RAYCHEM电伴热系统施工及维护手册
Raychem HWAT-M 单管热水配置系统维护指南说明书
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SPECIFICATION GUIDELINEHOT WATER TEMPERATURE MAINTENANCESPECIFICATION GUIDELINEHOT WATER TEMPERATURE MAINTENANCES12 – Hot Water ServicesApplication: Domestic Hot Water Services (DHWS)nVent RAYCHEM - HWAT-M system complete with HWAT-Eco controller, SBS-xx-HV-ECO-10 control panel, or ACS-30 control & Monitoring system and RAYCHEM cold applied RayClic connection devices.The RAYCHEM HWAT-M hot water temperature maintenance system will provide a constant maintenance temperature of 50-55°C across a single pipe hot water distribution system.The Product shall be manufactured, supplied and delivered by:nVent Ltd.3 Rutherford RoadStephenson Industrial EstateWashington, Tyne & WearNE37 3HXTel (UK): 0800 969 013Tel (Ireland) 1800 654 241E-mail (UK): ************************E-mail (Ireland): *****************The heating cables shall be specifically designed for this application and shall comply with HSEHS (G) 70 as does the RAYCHEM Hot Water Maintenance System by nVent.The heating cables shall be capable of demonstrating a lifetime in excess of 40 years and have been used for this application for at least 20 years.The heating cables and accessories shall be warranted for a minimum of 10 years, with the control devices being warranted for a minimum of 2 years. When installed by nVent or by a trained Certified Pro installer (named by the manufacturer), a 12 Year Warranty on heaters and accessories and 6 Years on controls is applicable.The domestic hot water supply has been designed as a single pipe system. No return pipes shall be fitted.All hot water service pipes shall be fitted with an energy efficient, self-regulating heating cable system, RAYCHEM HWAT-M, as manufactured by nVent, to compensate for heat losses and variably maintain pipe temperatures in the range 50-65°C.The self-regulating heating cables shall have modified polyolefin electrical insulation (radiation cross-linked, to ensure long life expectancy), laminated aluminium foil layer (for increased chemical ingress protection), tinned-copper braid and modified polyolefin over-jacket with metre marks for ease of installation. The self-regulating index of the heating cable shall be at least 0.25. The cable shall also comply with EN62395-1.SPECIFICATION GUIDELINEHOT WATER TEMPERATURE MAINTENANCEInterconnection and termination shall be with cold applied, insulation displacement connectors and gel type end seals, UV resistant, IP 68, 65°C rated, as manufactured by nVent and known as RayClic.Control of HWAT circuits shall be via an energy saving, programmable controller to provide adjustable maintained temperatures in the range 50-55°C, as manufactured by nVent. The controller shall have a boiler temperature sensor (i.e. HWS flow temp) and alarm system, 7-day programmable temperature/time function, integrated clock, pre-set specific building programs, Legionella prevention cycle capability, password protection, optical and acoustic alarm fault messages. Acceptable control solutions include: -RAYCHEM HWAT-ECO Controller-RAYCHEM SBS-xx-HV-ECO-10 Control Panel including electrical protection devices.-RAYCHEM ACS-30 Control & Monitoring system with centralized user interface and decentralized power and control modules.The HWAT cables shall be installed ‘straight traced’(i.e. not spirally wound), within their maximum circuit lengths, tested and commissioned strictly in accordance with the manufacturer’s instructions, preferably by a specialist installer named by the manufacturer. The commissioning report must be registered to gain benefit from the product warranty. The system should be installed to within 1000mm of each outlet or blending valve, or as close as is reasonably practicable, and in accordance with hot water maintenance regulations.Insulation selection and thickness shall be in strict accordance with the HWAT design guide, taking into account variations in ambient temperature, and must be applied without delay after the heating cable installation. Affix suitable “Electrically Traced” warning labels to the outer insulation, placed no less than 3m apart, on alternate sides of the pipe and visible from all sections.All HWAT circuits shall be controlled and monitored via an approved control solution including integrated MCB’s (BS EN 60898 type C or D) and RCD (30 mA sensitivity, tripping within 100 ms). All connections between the electrical supply, control panel and HWAT circuits shall be installed by an approved electrical contractor.SPECIFICATION GUIDELINEHOT WATER TEMPERATURE MAINTENANCEControl SystemsThe Single Pipe DHWS (HWAT) system shall be controlled by either of the following control solutions, selected in function of the size of the DHWS distribution system:-HWAT-ECO-SBS-xx-HV-ECO-10 Control Panel-ACS-30 Control and monitoring systemHWAT-ECO Control DeviceAll HWAT circuits shall be controlled via an energy saving, programmable controller to provide an adjustable maintained temperature and known as RAYCHEM HWAT ECO, manufactured by nVent.The controller shall have the following functions:-Adjustable maintenance temperatures in the range 50-55°C (or 55-65°C with HWAT-R cable)-Integrated power-off timer-Boiler temperature (HWS flow temp) tracking-Master/slave function for large hot water systems. One control unit (=Master) shall be programmable; the other control units (=slaves) shall automatically copy the master settings when connected to it. The master control unit shall have the facility to operate a further 8 slave units -BMS connection via a variable DC voltage (0-10V).-IP54 rated-9 editable built-in building specific programmes for temperature maintenance-Automatic summer/winter time and leap year correction programming-Visible and audible alarmSPECIFICATION GUIDELINEHOT WATER TEMPERATURE MAINTENANCESBS-xx-HV-ECO-10 Control PanelAll hot water temperature maintenance trace-heating circuits shall be controlled and monitored via an integrated electrically protected, multi circuit control panel, SBS-xx-HV-ECO-10, by nVent.The HWAT panel shall provide control and monitoring functionality for a multiple circuit single pipe hot water temperature maintenance system including the provision of all electrical and circuit protection devices for safety purposes. The electrical panel shall be approved for use with the HWAT system and be certified for use by nVent.The control panel shall be available, as standard, in the following variants:SBS-03-HV-ECO-10 (Control & monitoring for up to 3 circuits)SBS-06-HV-ECO-10 (Control & monitoring for up to 6 circuits)SBS-09-HV-ECO-10 (Control & monitoring for up to 9 circuits)The panel shall comprise an integrated power load management algorithm to avoid peak power loading.The control and monitoring panel shall have, as a minimum:EN60204-1 and EN60439-1 compliance, CE approved for use with heat tracing systems.RAL7035 (Light Grey) Coated Metal Housing – IP54 rated.A volt free alarm contact to indicate:•RCD or circuit breaker failure mode•Loss of power indicator•Controller or sensor error detection modeA phased switch-on to allow peak load management. The phased switching should be managed by an integrated time-shift duty-cycle control method.An HWAT-ECO control unit as the central control device for standard heating and economy set-back mode programmable functions.Type C circuit protection and residual current device (30 mA rated) per heating circuit.Mounted terminal blocks for easy connection of the heating circuits within the panel.An integrated boiler output temperature sensor for HWS flow temperature tracking capability.All electrical connections between the electrical supply, control panel, and the heating circuits shall be carried out by an approved electrical contractor.SPECIFICATION GUIDELINEHOT WATER TEMPERATURE MAINTENANCEACS-30 Control & Monitoring SystemAll heat-tracing circuits shall be controlled and monitored via an electrically protected, multi circuit control solution, with an integrated centralised user interface terminal (UIT), known as RAYCHEM ACS-30, from by nVent. The UIT shall include 3 customisable alarm outputs forcustomer specification.The control & monitoring (C&M) system shall provide control and monitoring functionality for a multiple circuit heat-tracing system including the provision of all electrical and circuit protection devices.The Control system shall be certified and approved by the manufacturer for use with the heat-tracing system. The C&M system shall be modular for easy design and shall comprise some or all of the following product modules:ACS-30-EU-UIT2 Touch screen colour user interface terminal for control and monitoring of up to 260 individual circuits (Always included in the system).ACS-30-EU-PCM2 power & control modules which include integrated control & monitoring capability and electrical safety for equipment personnel and circuit protection switchgear. The power & control module will also include 5, 10,or 15 heating circuit capability, dependent upon selection, and will include an input (temperature sensor or external device) per circuit for individual heater circuit temperature monitoring (At least one PCM shall be included in the system).ACS-30-EU-Moni-RMM2-E remote monitoring module for the addition of 8 resistance temperature detectors (RTDs) for connection to the ACS-30-EU-PCM or to the - ACS-30-EU-UIT2. Up to 16 RMM modules may be controlled via a single User interface Terminal (UIT).The control system shall be capable of controlling and monitoring up to 260 individual circuits of heat-tracing via a centralised user interface terminal (UIT) for easy system monitoring.The heating circuit power and control modules (PCM) shall be modular, decentralised solutions to enable placement throughout the building, or group of buildings, in proximity to the required heating system to limit the quantity of power cabling.The PCMs shall be connected to the UIT via RS-485 cable for communication, control & monitoring purposes. In the event of power failure or communication failure from the UIT, the PCM shall be capable of continued function for safety and system continuity.The C&M system shall be capable of monitoring circuit by circuit line or ambient temperature, energy consumption, energy usage pattern, and ground fault/earth fault detection. There shall be an alarm function on a circuit by circuit basis. In the event of an alarm, the UIT shall provide details of the alarm reason as well as indicating the specific circuit(s) affected, with the event captured automatically in the event log in the UIT.The control system shall be compliant with European norm EN60439-1 and be tested and CE approved to this standard.SPECIFICATION GUIDELINEHOT WATER TEMPERATURE MAINTENANCEAll UIT and PCM units shall be RAL7035 (light grey) coloured metal enclosures for hard wearing durability. Type C circuit protection and residual current device (30mA rated) shall be included in the PCM per heating circuit. All electrical connections between the electrical supply, UIT, power & control modules, ancillaries, and heating circuits shall be carried out by a qualified and approved electrical contractor.In Engineering Notes ColumnThe domestic hot water supply has been designed as a single pipe DHWS. No return pipes shall be fitted in order to minimise heat loss and improve energy efficiency.All hot water service pipes shall be fitted with the energy efficient, self-regulating heating cables, RAYCHEM HWAT-R, as manufactured by nVent to maintain an adjustable temperature in the range 50-65°C.Termination of the self-regulating heating cables shall be with insulation displacement type connectors and gel type end seals, Rayclic, as manufactured by nVent.The circuits shall be controlled via an energy saving, programmable controller, HWAT ECO*, SBS-xx-HV-ECO-10*, or ACS-30* (*delete as appropriate), as manufactured by nVent, to provide adjustable temperatures in the range 50-65°C.The HWAT cables shall be installed ‘straight traced’ (i.e. not spirally wound), insulated, tested and commissioned strictly in accordance with the HWAT design guide and preferably by nVent or a specialist installer named by them.The cables shall be installed to within 1000mm of each outlet or blending valve, or as close to the draw-off point as is reasonably practicable.Insulation selection and thickness shall be in strict accordance with the HWAT design guide.SPECIFICATION GUIDELINEHOT WATER TEMPERATURE MAINTENANCEAppendix A.UKTel 0800 969 013Fax 0800 968 624************************IrelandTel 1800 654 241Fax 1800 654 240*****************Our powerful portfolio of brands:CADDY ERICO HOFFMAN RAYCHEM SCHROFF TRACER。
电伴热系统组成及日常维护
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03
尾端接线盒:尾端接线盒是用来密封电伴热带的尾端,从而使电伴热带不至于受潮发生短路现象的一种装置。
04
电伴热系统介绍-电伴热敷设
冬季电伴热的日常维护
进入冬季生产以后,电伴热系统对整个平台生产设施及工艺流程起着至关重要的保温作用,保证电伴热系统安全稳定无故障运行是保证安全生产的重要前提
每日检查各回路开关是否正常,是否有跳闸回路。如出现故障回路,及时汇报并及时检查处理故障回路,尽快恢复故障回路运行,并做好完整的维修记录。
电伴热系统介绍-电伴热带的工作原理
(*)
电伴热系统介绍-电伴热带结构
镍铜芯导线。 发热材料,(低、中、高温含氟PTC材料,材料为不燃) 乙烯、阻燃聚乙烯、氟塑料绝缘护层和加强护层。 丝、镀镍铜丝、铝合金丝、不锈钢编织屏蔽层
常用的电伴热带有如下几种型号 QTVR2-CT型自控电件热线专用于工艺管线或容器储罐的防冻和保温、最高维持温度为110℃。伴热线适用于普通区,危险区或腐蚀区。产品型号如下:10QTVR2-CT、15QTVR2-CT、20QTVR2-CT BTV2-CT型自控电件热线专用于工艺管线或容器储罐的防冻和保温、最高维持温度为65℃。伴热线适用于普通区,危险区或腐蚀区。产品型号如下: 3BTV2-CT、5BTV2-CT、8BTV2-CT XTV2-CT型自控电伴热线专用于耐间歇性高温蒸汽吹扫、工艺管线或容器储罐的防冻和保温、最高维持温度为121℃。伴热线适用于普通区,危险区或腐蚀区。 10XTV2-CT、15XTV2-CT、20XTV2-CT
电伴热具有热效率高,节约能源,设计简单,施工安装方便,无污染,使用寿命长等特点
电伴热是电热的能量来补充被伴热体在工艺流程中所散失的热量,以维持流动介质最合理的工艺温度,它是一种高新技术产品。
电伴热作业指导书
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一.概述 (2)二.施工规范及依据 ......................... (4)三.施工方法及程序 (5)四.质量验收评定标准及验收方法 (9)五.HSE管理措施............................. .10概述温控伴热电缆(简称电缆)又称自调控电伴热线或自限温电热带。
它是一种电热功率随系统温度自调的带状限温伴热器。
即电缆本身具有自动限温,并随着被加热体系的温度变化能自动调整发热功率的功能,以保证工作体系始终稳定在设定的最佳操作温区正常运行。
1.1 工作原理温控伴热电缆的电热元件,是在两根平行金属母线之间均匀的挤包一层PTC材料(半晶高聚物与炭黑的共混物)制成的芯带。
PTC 材料经熔融挤出、冷却定型之后,分散其中的炭微粒形成无数纤细的导电炭网络。
当它们跨接在两根平行母线上时,就构成芯带的PTC 并联回路。
电缆一端的两根母线与电源接通时,电流从一根母线横向流过PTC材料层到达另一根母线形成并联回路。
PTC层就是连续并联在母线之间的电阻发热体,将电能转化成热能,对操作系统进行伴热保温。
当芯带温度升到相应的高阻区时,电阻大到几乎阻断电流的程度,芯带的温度将达到高限不再升高(即自动限温)。
与此同时,芯带通过护套向温度较低的被加热体系传热,达到稳态时单位时间传递的热量等于电缆的电功率。
电缆的输出功率主要受控于传热过程以及被加热体系的温度。
1.2 主要技术参数低温系列性能参数—标准颜色:黑色—温度范围:最高维持温度65C最高曝露温度85 C最高表面温度85C—施工温度:最低-60 C—热稳定性:由10C至99C间来回循环300次后,电缆发热量维持在90% 以上。
—弯曲半径:20C室温时,为25.4mm -30C低温时,为35mm—绝缘电阻:伴热电缆长度100m环境温度75C时,绝缘电阻最小值为20M D。
中温系列性能参数—标准颜色:褐色—温度范围:最高维持温度105C最高曝露温度135C最高表面温度135C—施工温度:最低-30 C—热稳定性:由10C至149C间来回循环300次后,电缆发热量维持在90%以上—弯曲半径:20C室温时,为25.4mm -30C低温时为35mm—绝缘电阻:伴热电缆长度100m,环境温度75C时,绝缘电阻最小值为20 M Q。
高效节能的Raychem自调控电伴热
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nVent Raychem HWAT热水温度维护系统说明书
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INTRODUCTIONThe HWAT system is a hot water temperature maintenance system that utilizes an electronic controller, self-regulating electric heating cables, and an easy-to-install set of connection kits to provide commercial buildings with immediate hot water at the tap without the use of a water recirculation system.Recirculation systems require the water heater temperature to be at least five degrees above the maintain temperature to compensate for the heat that is lost in the recirculation loop. With HWAT systems, the water in the supply pipe is maintained at a constant temperature along the entire length of the supply pipe so heating the water above the maintain temperature is not required. Recirculation systems also require return lines, pumps, and balancing valves, all of which are all unnecessary with HWAT.A key component of the HWAT system is the HWAT controller. In addition to providing flexible temperature control, the controllers provide energy savings; a heat-up cycle that increases the water temperature in stagnant pipes; Building Management System (BMS) interface; alarm relay to signal power, temperature, or communication problems; a water heater sensor function; and nine predefined programs that can be customized by the user.This step-by-step design guide provides the tools necessary to design a nVent RAYCHEM Hot Water Temperature Maintenance System (HWAT). For additional information, contact your nVent representative or call (800) 545-6258. Also, visit our website at /RAYCHEM .Table of ContentsINTRODUCTION .................................................................................... 1Typical Applications ............................................................................................................. 2Approvals and Code Compliance ..................................................................................... 2Safety Guidelines .................................................................................................................. 2Ground Fault Protection ...................................................................................................... 3Scald Protection ................................................................................................................... 3Design Requirements .......................................................................................................... 3SYSTEM OVERVIEW .............................................................................. 3HWAT Electronic Controllers ............................................................................................. 4HWAT Heating Cables ......................................................................................................... 4RayClic, FTC and HWT Connection Kits ......................................................................... 5DESIGN GUIDELINES ............................................................................ 5Before You Begin (6)Hot Water Temperature Maintenance –HWAT SystemTypical ApplicationsThe HWAT system is designed to be installed and operated in commercialbuildings. Table 1 shows typical HWAT applications, desired maintain temperatureswhen nVent RAYCHEM HWAT-P1 heating cable is used in conjunction with thenVent RAYCHEM HWAT-ECO-GF, or when nVent RAYCHEM HWAT-R2 heatingcable is used in conjunction with the nVent RAYCHEM HWAT-ECO-GF orACS-30 controllers.Table 1 Typical HWAT Applications* with HWAT-R2 only.This design guide covers standard HWAT applications which must meetthe following conditions:• Installed on copper or rigid plastic pipes• Insulated in accordance with the insulation schedule shown in Table 6• Powered at 120 V using HWAT-ECO-GF or at 208 - 277 V using the ACS-30 orHWAT-ECO-GF controller• Operated indoors where the ambient temperature is relatively constant andbetween 60°F (15°C) and 80°F (27°C)If your application does not meet the above conditions, contact yournVent representative for custom design assistance.Approvals and Code ComplianceThe HWAT system components are c-UL-us Listed, CSA Certified, and/orFM Approved in nonhazardous locations.HWAT-P1 and HWAT-R2 heating cables, RayClic and HWT connection kits are UL Listed, CSA certified andFM approved for use in non-hazardous locations. The FTC-HST-PLUS connection kit and the HWAT-ECO-GF controller are c-UL-us Listed and the ACS-CRM and the ACS-CRMS controllers are c-UL-us certified(ACS-UIT3) to US and Canadian standards for us in non-hazardous locations. Refer to the specific productdata sheets for details.The HWAT system is designed in accordance with the following international andnational codes:• International Plumbing Code• International Building Code• International Energy Conservation Code• National Standard Plumbing Code• National Electrical Code• Canadian Electrical Code• ANSI/ASHRAE Standard 188-2018 - Legionellosis: Risk Management for BuildingWater Systems• CIBSE TM13-2013 Minimising the Risk of Legionnaires DiseaseAdditionally, our HWAT solution has numerous state and local code approvals.Contact your nVent representative for further information. Due to its potentialto reduce energy usage and greenhouse gas emissions, HWAT solutions areeligible for LEED points.Safety GuidelinesThe safety and reliability of any heat-tracing system depends on the quality of theproducts selected and on proper design, installation, and maintenance. Incorrectdesign, handling, installation, or maintenance of any of the system componentscan cause underheating or overheating of the pipe or damage to the heating cablesystem and may result in system failure, electric shock, or fire. The guidelinesand instructions contained in this guide are important. Follow them carefully tominimize these risks and to ensure that the HWAT system performs reliably.Pay special attention to safety warnings identified as WARNING.Ground Fault ProtectionTo minimize the danger of fire from sustained electrical arcing if the heatingcable is damaged or improperly installed, and to comply with nVent requirements,agency certifications, and national electrical codes, ground fault equipmentprotection must be used on each heating cable branch circuit. Arcing may notbe stopped by conventional circuit breakers. The HWAT-ECO-GF and ACS-30controllers meet the electrical code requirements for ground fault equipmentprotection.Scald ProtectionHWAT systems present an increased risk of scalding due to the high water Array temperature. Pay special attention to the scald warning to the left.Design RequirementsTo comply with warranty requirements, the design and installation of the HWATsystem must be in accordance with this guide and the additional documentslisted below:• HWAT-ECO-GF Installation and Operations Manual (H60223)• HWAT System Installation and Operations Manual (H57548)• Rayclic Connection Kit Installation Instructions (H55388 and H55092)Installation documents are shipped with the respective products and are alsoavailable on our website at /RAYCHEM.SYSTEM OVERVIEWA complete HWAT system includes one or more HWAT-ECO-GF or ACS-30electronic controllers, HWAT-P1 or HWAT-R2 heating cable and nVent RAYCHEMRayClic connection kits. Fig. 1 illustrates a typical HWAT system. The keycomponents of the system will be described in this section.Fig. 1 Typical HWAT heating cable systemHWAT Electronic ControllersThe HWAT-ECO-GF electronic controller is designed for use with a single circuit ofHWAT-P1 or HWAT-R2 self-regulating heating cable. For large hot water systemsthe ACS-30 distributed controller is available, refer to the ACS-30 data sheet(H58261) for more information. The HWAT-ECO-GF provides a variety of featuresand control options, listed below, for your hot water temperature maintenancesystem.Fig. 2 HWAT-ECO-GF controller• Equipment rated ground fault protection built-in• Intuitive set-up and programming, includes a 5" inch color touch screen• Flexible temperature control of hot water temperature maintenance systems• Energy savings through an integrated function that lowers the maintaintemperature during hours of low water consumption• Heat-up cycle function that increases the water temperature of the hot waterin the pipes• Alarm relay to signal power, temperature or communication problems• Hot water storage and pipe temperature monitoring with high and lowtemperature alarms and automatic system shut down• Seven pre-defined building timer programs that can be customized by the user• Program in advance in power-off mode by using external power bank/chargerand USB connectionHWAT Heating CablesHWAT-P1 or HWAT-R2 self-regulating heating cables are installed on hot watersupply pipes underneath standard pipe insulation. The heating cable adjusts itsFig. 3 HWAT heating cableHWAT heating cables provide the following features:• Adjust power output to reduce the variations in water temperature • Can be cut to length, spliced, teed, and terminated in the field • Designed for use with the HWAT-ECO-GF or ACS-30 controllerrRayClic, FTC and HWT Connection KitsThe RayClic connection system is a simple, fast, and reliable set of connection kits developed for use with HWAT self-regulating heating cables. RayClic connection kits reduce installation time, lowering the total installed cost of the HWAT system. nVent RAYCHEM HWT-P and FTC-HST-PLUS heat shrink kits may also be used.RayClic-PCAlternate lighted end sealFig. 4 RayClic connection kitsDESIGN GUIDELINESThis section describes the seven steps necessary to design an HWAT system:1 Select the heating cable 2 Lay out the heating cable3 Select connection kits and accessories4 Finalize circuit length5 Select control configurations6 Select thermal insulation7 Complete Bill of MaterialsTo assist you with the design, we will carry two design examples through this process. The example details are listed below each step in red.Example 1Example 2An elementary school where 115°F (46°C) is the desired maintain temperature and no heat-up cycle is required. Piping layout showsapproximately 300 ft of pipe with two branches at the same location.A medium security prison where 115°F (46°C) is the desired maintain temperature and a 140°F (60°C) heat-up cycle is required. Pipinglayout shows approximately 700 ft of pipe with two branches at different locations.Before You BeginBefore you begin designing your HWAT system, gather this necessary information:• Desired maintain temperature • Indoor ambient temperature • Supply voltage • Piping layout • Total pipe length • Pipe diametersStep 1 Select heating cableUse Table 2 to select the appropriate system temperature setting. For more information on heat-up cycles, refer to the HWAT-ECO-GF Installation and Operations Manual (H 60223) or ACS-30 Programming Guide (H 58692). Heating Cable Catalog NumberBefore beginning, take a moment to understand the structure underlying heating cable catalog numbers. You will refer to this numbering convention throughout the product selection process. Your goal is to determine the catalog number for the product that best suits your needs.Catalog number: HWAT -P 1 or R 2Voltage P 1 = 120 VR 2 = 208, 240, 277 VFig. 5 Heating cable catalog numberRecord the following information: • Desired maintain temperature (°F/°C) _____________• Indoor ambient temperature (°F/°C) _____________• Supply voltage (V) _____________• Heat-up cycle (Yes/No) _____________• Temperature (°F/°C)_____________Example: Heating Cable Selection Example 1 Example 2Desired maintain temperature 115°F (46°C) 115°F (46°C)Ambient temperature 70°F (21°C) 70°F (21°C)Supply voltage208 Vac208 VacHeat-up cycle required No Yes Heat-up cycle temperature n/a 140°F (60°C)Table 2 HWAT System Temperature Range* For additional information on heat-up cycles, refer to the “Expanded HWAT-ECO-GFElectronic Controller Capabilities” section of the HWAT-ECO-GF Installation and Operations Manual (H 60223).Heating Cable Selection ExampleHeating cable selected HWAT-R 2Step 2 Lay out the heating cableThe piping layout of your building may require more than one HWAT circuit. To determine the number of circuits, group your piping by maintain temperature and location, a step that may require you to consult the plumbing and/or electricalengineer. Calculate the total length of pipe in each group, allowing one foot of heating cable for each foot of pipe. The length of heating cable in each group must not exceed the circuit lengths listed in Table 3.In Step 4, you will calculate the additional cable required to install the connection kits. This will increase the total length of heating cable and may require the needfor additional circuits.Table 3 Maximum Circuit LengthNote: Assumes a minimum water temperature of 50°F (10°C) at startupExample: Lay out circuits Example HWAT heating cable selected HWAT-R 2Length of pipe 700 ft Number of circuits 2Circuit breaker size30 AmpStep 3 Select connection kits and accessoriesHWAT systems are approved and warranted only as a complete system. The appropriate RayClic, FTC or HWT connection kits must be used. Use Table 4 to select the connection kits and accessories necessary for your HWAT system. Refer to the RayClic Connection System data sheet (H 57545) and the FTC Heat Shrinkable Connection Kits Datasheet (H 58159) in the Technical Data section for more information on the products.The appropriate numbers of end seals are included with each connection kit.Table 4 Connection Kits and Accessories* To minimize cable waste, nVent recommends that one RayClic-S be ordered for every 500 feet of cable.Example: Select connection kits and accessories Example Piping layout determined that the following 2 RayClic-PC connection kits and accessories are required. 2 RayClic-T 14 GT-6670 ETLStep 4 Finalize circuit lengthAdditional cable is required for future access at each connection kit. Add the additional cable, as detailed in Table 5, to the estimated circuit lengths from Step 2. Confirm that the maximum lengths shown in Table 3 have not been exceeded. If your circuit lengths are greater than those shown, reconfigureyour heating cable layout to allow for additional circuits.Table 5 Additional Cable Required for Each Connection KitExample: Finalize circuit length ExampleCircuit 1* Circuit 2*Length of heating cable per circuit 350 ft 350 ft Additional cable required RayClic-PC 2 ft 2 ft RayClic-T3 ft 3 ft RayClic-X n/a n/aTotal length of heating cable required355 ft355 ft* In this example, the circuits were evenly divided. Equal circuit lengths are notrequired.Step 5 Select control configurationFor single circuit applications, choose the HWAT-ECO-GF controller. For multi-circuit applications, choose the ACS-30 controller.Example: Select control method Example 1 Example 2TypeIndividual circuit Multi-circuit Number of circuits 1up to 260ControllerHWAT-ECO-GF ACS-30Step 6 Select insulationSelect the size of thermal insulation from Table 6. You will need to know the length and diameter of each pipe used in your application.For pipes 1 1/4 inches and smaller, use insulation that is oversized by 1/4 inch to allow room for insulating over the heating cables. Table 6 specifies IPS (Iron Pipe Size) insulation, which has a greater inner diameter than CTS (Copper Tube Size) insulation.For pipes 3 inches and larger, the thickness of insulation can either be equal to the pipe diameter with a single heating cable or 1/3 the pipe diameter with two heating cables. For example, a 6 inch pipe with 6 inches of insulation and one run of heating cable is equivalent to a 6 inch pipe with 2 inches of insulation and tworuns of heating cable.Table 6 Fiberglass Insulation Selectionpipe diameter with one run of heating cable or 1/3 the pipe diameter with two runs of heating cable.Example: Select InsulationCopper pipe size (in)IPS insulation size (in)Insulation thickness (in)Example 13/41111 1/411 1/21 1/21 1/2Example 211 1/412222 1/22 1/22 1/2Step 7 Complete Bill of MaterialsYou are now ready to compile a Bill of Materials. Using the design results, detail each item as shown in Table 7 below. Fig. 5 illustrates a complete typical HWAT system./RAYCHEM | 11RAYCHEM-DG-H57510-HWATHotWaterTempMaint-EN-2210Fig. 7 Typical configuration for the ACS-30 system Table 7 Bill of Materials (Example)North AmericaTel +1.800.545.6258Fax +1.800.527.5703**********************©2022 nVent. All nVent marks and logos are owned or licensed by nVent Services GmbH or its affiliates. All other trademarks are the property of their respective owners.nVent reserves the right to change specifications without notice./RAYCHEM | 12。
nVent Raychem SBS-XX-CM-20 表面雪融系统控制面板说明书
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20DESCRIPTIONThe nVent RAYCHEM SBS-XX-CM-20 control panel for ice andsnow prevention systems provides a totally integratedelectrical safety, connection and control solution for nVentRAYCHEM EM2-CM constant wattage heating mats for surfacesnow melting applications. The control panel comprises theVIA-DU-20 multi-sensor control unit for energy efficient groundsurface heating, and integrated electrical safety devices.The SBS-XX-CM-20 panels offer solutions up to 18 maximumcircuits of EM2-CM mats.The panel also includes electrical circuit protectiondevices (C-type circuit breakers) and residual current devices forsafety and peace of mind. The panels needonly be connected to the 400Vac (3 phase) supply. ADVANTAGESFast connection of multiple circuits directly into the control panel• No need for additional connections terminals–3-18 heating circuit can be connected and switched by a single panel–Circuit protection and safety devices integrated into the panel• No need for separate safety devices–Complete system from the manufacturer• System and components specifically selected for high performance ice and snow prevention system controlTECHNICAL DATAControl VIA-DU-20 multi-sensor control unitNominal Voltage (Un)400V (3 Phase)Rated voltage per heater circuit (Ue)230VSensor Ground temperature, moisture, and ambient temperature sensorsApproval CE (Approved to IEC61439)Supply Dependent on selected panel (25A-125A)RCD30mAAmbient temperatures +10ºC to +35ºCLine Circuit breakers20A (Type C) per 3 heater circuit groupInstallation Location IndoorExternal protection rating IP65Colour RAL 7035 (Grey)Enclosure type and material HOFFMAN Brand (nVent), Metal enclosureSelector switch Auto/Manual heating circuit switchingAlarm function1 general potential free alarm contact; alarm light indicator on panel front©2018 nVent. All nVent marks and logos are owned or licensed by nVent Services GmbH or its affiliates. All other trademarks are the property of their respective owners. nVent reserves the right to change specifications without notice.SBS CONTROL PANEL WEIGHT & DIMENSIONS TABLESBS-03-CM-2032600400210SBS-06-CM-2045600600210SBS-09-CM-2045600600210SBS-12-CM-2090800800210SBS-15-CM-2090800800210SBS-18-CM-201151000800300RELATED PRODUCTSThe SBS-XX-CM-20 control panel is compatible with the RAYCHEM EM 2-CM heating mats:RAYCHEM EM 2-CM heating mats (300W/m 2)GM-2XT (for drain line heating)**T he SBS-XX-CM-20 panel includes an additional circuit connection for drain heating capabilities at the edge of heated surfaces or at the lower end of ramps using GM-2XT heating cable (maximum drain line circuit length of 15m).PRODUCT REFERENCETo order the SBS-XX-CM-20 control panel, please reference:1244-006430SBS-03-CM-20Up to 3 Circuit control panel for EM 2-CM surface heating products 1244-006431SBS-06-CM-204-6 Circuit control panel for EM 2-CM surface heating products 1244-006432SBS-09-CM-20 7-9 Circuit control panel for EM 2-CM surface heating products 1244-006433SBS-12-CM-2010-12 Circuit control panel for EM 2-CM surface heating products 1244-008212SBS-15-CM-2013-15 Circuit control panel for EM 2-CM surface heating products 1244-008213SBS-18-CM-2016-18 Circuit control panel for EM 2-CM surface heating productsINSTALLATION INFORMATIONComplete panel wiring information and schematics are provided with the product. All electrical installations must be carried out by an approved electrician in compliance with local electrical requirements and norms.India - NoidaTel +91 120 464 9500Fax +91 120 464 9548*******************India - MumbaiTel +91 22 6775 8800/01Fax +91 22 2556 1491*******************UAETel +971 4 378 1700Fax +971 4 378 1777*******************United KingdomTel 0800 969 013Fax 0800 968 624************************IrelandTel 1800 654 241Fax 1800 654 240*****************South East AsiaTel +65 67685800Fax +65 67322263AustraliaTel +61 2 97920250Fax +61 2 97745931。
nVent RAYCHEM NGC-30 电伴热控制、监测及配电系统说明书
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30产品概述和防冻中的电伴热。
该系统拥有多个部件,满足从单一温度监测到接地故障、电压及电流测量的需求,从而将电伴热回路的运行状况等重要信息从现场传递到中心。
NGC-30系统可以按照维护和操作所需将现场所获数据转化成有用的信息,进而将常规检查降到最低。
NGC-30盘柜NGC-30是一个完整的分布式盘柜系统。
其特征包括:易于访问、将电线预先布置在易于访问的端子上。
为便于维护,工业标准仪表箱布线得以优化。
面板装配了漏电保护断路器和一个主断路器。
除了这些标准特性外,用户还可以选择性添加电伴热监测和控制的其他需求。
例如,选项可以包括接触器类型 (电子式或机械式),回路数以及备用数量,电压监测,警报灯指示,盘柜尺寸,电缆接入位置以及其他参数。
NGC-30盘柜系统可包含使用专用通讯线连接的多个互联电路柜。
主柜通常包括用户界面终端 (UIT),一般安装于门上。
NGC-30组件用户可以购买单独的组件并将NGC-30系统集成到自己的控制柜内。
NGC-30系统可按客户需求进行相应配置。
NGC-30的用户界面即用户界面终端(NGC-UIT3-EX)。
对于电流测量、接地故障或者分布控制等的需求逐渐凸显时,我们应该选择卡柜 (CR),机械继电器的卡柜模块 (CRM)、和/或电子式继电器的卡柜模块(CRMS)、变流器模块 (CTM) 和电压模块 (CVM)。
NGC-30系统有两种远程测量模块可选,这些模块是用于温度测量的RMM2和用于数字输入的RMM2-DI。
对于MoniTrace 200N-E 系统的用户,可以使用远程监控模块 (RMM) 和远程控制器模块 (RMC) 等完全兼容的组件。
功能强大的RAYCHEM Supervisor监控软件通过电伴热控制配置和监测的PC 机软件包对系统进行完善。
用户端- 服务器应用可以让世界各地的用户随时访问所有信息。
这使得RAYCHEM Supervisor监控软件成为电伴热解决方案中强有力的管理工具。
nVent Raychem HWAT 混合热水系统规格指南说明书
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SCOPEThis specification describes an energy efficient system fortemperature maintenance of a domestic potable hot water supply.GENERALThe domestic hot water supply has been designed as a hybridsystem, with recirculation loops on the main supply pipesoptimised by the use of a self-regulating heating cable systemon all branch pipe run outs, known as nVent RAYCHEM HWATas manufactured by nVent.The system shall be complete with self-regulating heatingcables, advanced energy efficient controller and cold appliedcomponents for interconnection and termination.All electrical system components shall be sourced from a singlemanufacturer, under no circumstances shall any components beinstalled other than those supplied by the cable manufacturer, toensure system integrity and meet warranty requirements.The manufacturer shall offer an extended warranty of 10 years for heating cables and components and 2 years for controllers, subject to the system being designed, installed, tested and commissioned strictly to their requirements. The warranty shall be extended to 12 years on heating cables/components and 6 years on controls when installed by the manufacturer or by a trained installer recognised by them. All subject to the completion of the online warranty registration.The system shall be capable of being designed within a BIM model and the manufacturer shall provide a BIM add-in for Autodesk Revit MEP to automate the design process.The heating cables, controls and system components shall be CE marked and certified according to EN codes by BSI, VDE, CSTB, SEV, ÖVE and fulfil the hygiene requirements of DGVW and SVGW.Document submittal shall include all of the following: data sheets (for heating cables, interconnection/termination components and controller), system design guide, typical system schematic drawings, controller wiring diagrams, system installation and operation manual, along with approval certificates upon request.SELF-REGULATING HEATING CABLESThe self-regulating heating cables shall be specifically designed for this application, tested and approved to IEC 62395 andIEEE 515.1, suitable for use with 20A circuit breakers and with a minimum bend radius less than or equal to 10mm.The manufacturer shall demonstrate minimum 40 year experience in producing self-regulating heating cables and beISO-9001 registered.The manufacturer shall provide an extensive global reference list for this application, including installations that have been in operation for over 15 years.The self-regulating heating cables shall be qualified and tested to demonstrate a useful lifetime in excess of 40 years.The construction of the self-regulating heating cables shall include a conductive polymer core (qualified for hot water temperature maintenance), modified polyolefin electrical insulation (radiation cross-linked, to ensure long life expectancy), laminated aluminium foil layer (to protect the heater core from chemical ingress), tinned copper braid with minimum 70% coverage and modified polyolefin over jacket printed with cable model, batch number and metre marks (for ease of installation within maximum circuit length).[Select One Option][Option 1]The self-regulating heating cable shall be nVent RAYCHEM HWAT-R and provide pipe maintained temperatures in the range 50-65°C [Option 2]The self-regulating heating cable shall be nVent RAYCHEM HWAT-M and provide pipe maintained temperatures in the range 50-55°C INTERCONNECTION AND TERMINATION COMPONENTSInterconnection and termination shall be with cold applied insulation displacement connectors and gel type end seals, which are UV resistant, IP68 and 65°C rated, suitable for 2500Vdc insulation resistance test, with Torx head fittings for ease of installation and both audible & visual installation confirmation, known as RayClic, manufactured by nVent.THERMAL INSULATIONInsulation selection and thickness shall be strictly in accordance with the self-regulating heating cable system design guide,with variations in ambient temperature fully considered. Insulation sections shall be applied without delay after the heating cable installation, affixed with suitable warning labels less than 3 m apart on alternate sides and visible from all sections.ENERGY EFFICIENT, CONTROL SYSTEM[Select One Option](Option 1)Multi-Circuit, Multi-Application Distributed Digital Control SystemAll hot water temperature maintenance circuits shall be controlled and monitored using a centralised control system with distributed power and control modules, known as nVent RAYCHEM ACS-30, complete with integrated HWAT ECO, manufactured by nVent.The centralised control system shall provide pre-programmed parameters to provide concurrent control for heating cables used for hot water temperature maintenance, pipe freeze protection, flow maintenance, surface snow melting, roof and gutter de-icing and floor heating applications.The control & monitoring system shall be modular for easy design and include:[select some or all of the following product modules]User Interface Terminal (UIT): a colour touch-screen central user interface terminal for control and monitoring up to 260 heating cable circuits, known as ACS-30-EU-UIT2, manufactured by nVent [always included in the system]Power Connection Module (PCM): to provide distributed power connection, control and monitoring of heating cable circuits, and integrated electrical protection, known as ACS-30-EU-PCM2, manufactured by nVent [at least 1 PCM shall be included in the system, up to 52 PCMs may be connected to each UIT]Remote Monitoring Modules (RMM): to measure additional temperatures for control and monitoring of heating cable tracing circuits, known as ACS-30-EU-Moni-RMM2-E, manufactured by nVent [up to 16 RMM modules may be controlled via a single UIT, with up to 8 RTDs per RMM]The centralised control system shall have the following functions:Multiple circuit, multiple heating cable applicationsModular design and installation - to provide total flexibility, including any future building modificationsControl and monitoring of up to 260 heating cable circuits - through a single user interface terminal (UIT)Central programming through the UIT3 user programmable alarm relays for user specified communication of alarm conditionsProtoNode high performance protocol gateway connection to allow translation from native ModBus to BacNet protocols Distributed power control modules (PCMs) - for placement throughout the building or group of buildings, to provide power connection, circuit protection and integrated control & monitoring in proximity to all required heating cable applications and to limit the power cabling neededPCMs with 1 sensor input per circuit for individual circuit temperature monitoringRemote monitoring modules (RMMs) - to measure additional temperatures for control and monitoringRMMs with up to 8 additional resistance temperature detectors (RTDs)UIT communication with up to 52 PCMs and up to 16 RMMsPCMs shall additionally• Provide 5, 10 or 15 circuits with integrated electrical and circuit protection (either 20A or 32A)• Contain control logic circuitry to ensure continuity of heating cable operation in the event of power failure orcommunication failure with the UIT• Provide circuit by circuit monitoring of line or ambient temperature, energy consumption, energy usage pattern andground fault/earth fault detection• Enable circuit by circuit alarm function, with the UIT providing details of the alarm, the circuit(s) affected and capture automatically in the event log.• Connect to the UIT via RS-485 cable for communication, control & monitoring purposesThe control system shall be compliant with IEC61439 and be tested and CE approved to this standard.The integrated energy efficiency controller shall have the following functions:Adjustable maintenance temperatures in the range 50-65°CWater heater temperature sensor (HWS flow temp) and alarm systemIntegrated power off timer function with 7 day programmable temperature versus time function, 8 editable built-in building specific programs for temperature maintenance, thermal shock program (for use with HWAT R), automatic summer/winter time and leap year correctionVisible and audible alarm5" Colour touch screen user interfacePassword protectionIP54 rated(Option 2)Single Circuit, Single Application ControllerAll self-regulating heating cable circuits shall be controlled with an energy saving thermostat, known as HWAT-T55, manufactured by nVent.The controller shall have the following functions:Digital display for pipe temperature and alarmPipe sensing temperature control with preset temperatures (55°C or 50°C)Maximum circuit length 50m3 operation modes (ON/ECO/OFF)Built in timer for ECO modeDIN rail mountable (35mm)EXECUTIONDesign DeliverablesThe manufacturer shall be able to provide heat loss calculations and corresponding selection of self regulating heating cables with variations in ambient temperature and pipe size and thermal insulation fully considered, system layout and schematic drawings indicating power connections, tees and end seals, electrical schedules indicating cable length and circuit protection, controller configuration listing and wiring diagrams.Installation DeliverablesThe self-regulating heating cables shall be installed in accordance with the design plans, ‘straight traced’ (i.e. not spirally wound) within the manufacturers defined maximum circuit lengths, tested and commissioned strictly in accordance with the manufacturer’s instructions. Installation of thermal insulation shall be closely coordinated with the responsible sub-contractors.[Select One Option][Option 1]The system shall be installed, tested and commissioned by the manufacturer.[Option 2]The system shall be installed and tested by installers trained and recognised by the manufacturer and then commissioned by the manufacturer.[Option 3]The system shall be installed, tested and commissioned by installers trained and recognised by the manufacturer.[Option 4]The system shall be installed, tested and commissioned under periodical supervision by the manufacturer.Electrical ConnectionAll connections between the electrical supply, control panel and self-regulating heating cable circuits shall be installed by an approved electrical contractor. All self-regulating heating cable circuits shall be electrically protected by MCB (BS EN 60898 type C or D) and RCD (30 mA sensitivity, tripping within 100ms).ENGINEERING DRAWING NOTESThe domestic hot water supply has been designed as a hybrid system, with recirculation loops on the main supply pipes optimised by the use of a self-regulating heating cable system on all branch pipe run outs, known as nVent RAYCHEM HWAT as manufactured by nVent.Interconnection and termination shall be with cold applied insulation displacement connectors and gel type end seals, which are UV resistant, IP68 and 65°C rated, suitable for 2500Vdc insulation resistance test, with Torx head fittings for quality of closure and both audible & visual installation confirmation, known as RayClic, manufactured by nVent.The circuits shall be controlled via an energy saving, programmable controller[Select One](Option 1)ACS-30 as manufactured by nVent(Option 2)HWAT-T55 as manufactured by nVentThe self-regulating heating cables shall be installed in accordance with the design plans, ‘straight traced’ (i.e. not spirally wound) within the manufacturers defined maximum circuit lengths, tested and commissioned strictly in accordance with the manufacturer’s instructions. Installation of thermal insulation shall be closely coordinated with the responsible sub-contractors.Insulation selection and thickness shall be strictly in accordance with the self-regulating heating cable system design guide, with variations in ambient temperature fully. Insulation sections shall be applied without delay after the heating cable installation, affixed with suitable warning labels less than 3 m apart on alternate sides and visible from all sections.All connections between the electrical supply, control panel and self-regulating heating cable circuits shall be installed by an approved electrical contractor.©2018 nVent. All nVent marks and logos are owned or licensed by nVent Services GmbH or its affiliates. All other trademarks are the property of their respective owners. nVent reserves the right to change specifications without notice.AustraliaTel +61 2 97920250Fax +61 2 97745931United KingdomTel 0800 969 013Fax 0800 968 624************************India - NoidaTel +91 120 464 9500Fax +91 120 464 9548*******************IrelandTel 1800 654 241Fax 1800 654 240*****************India - MumbaiTel +91 22 6775 8800/01Fax +91 22 2556 1491*******************South East AsiaTel +65 67685800Fax +65 67322263UAETel +971 4 378 1700Fax +971 4 378 1777*******************。
电伴热安装运行维护注意事项
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电伴热运行可靠性性能分析及应用、电伴热应用情况介绍:电伴热作为给设备过冬提供保障的保温材料得到了广泛应用,个别作业区的冬防保温全部依赖电伴热带。
随着电伴热带的大量使用,电伴热带的安全平稳运行是冬季能否安全平稳运行的重要保障。
而电伴热出现了一系列问题,,也给冬季安全运行带来了极大的隐患。
运行时间越长出现的问题就越多,一方面要保障冬季安全运行就必须保障电伴热带的安全运行;另一方面电伴热带价格昂贵,增加了昂贵的成本。
如何确保电伴热带的安全平稳运行,已成为迫不及待的问题。
三、电伴热带运行中出现的问题:电伴热系统经过几年的运行后都会或多或少的出现下列问题:1)、安装不规所造成的各种问题:(1)、安装的电伴热带没有紧贴保温设备管壁安装,以及没有按规定方法缠绕(图1,图2),导致这些电伴热带没有起到伴热效果,无法达到需求的伴热效果。
、电伴热平稳运行的重要性:图1图22)、安装人员装保温层时,在打孔时,将伴热带打穿(图3),导致开关跳闸。
图33)、制做电伴热首头不合规范(图4),导致开短路跳闸。
图44)、电伴热安装未考虑防水,尾端进水(图5)短路,导致开关跳闸。
尾端进水短路图5(5)、施工人员在安装电伴热接线盒时,没考虑接线盒进水的进水的可能,造成接线盒进水结冰(图6),最终造成端子排短路。
进水接冰短路图6(6)、在包保温铁皮时,电伴热没有完全固定好,造成伴热带与保温铁皮相互磨损,最终造成伴热带破损(图7)短路。
破损图72)、同一根电伴热带出现一段热一段不热等现象。
3)、弯曲的电伴热出现了不热的现象。
4)、电伴热老化速度快。
5)、电伴热短路造成着火。
6)、使用时间长的电伴热带发热效果降低。
7)、电伴热接线盒容易进水,造成伴热工作不正常。
8)、安装时将绝缘层损坏。
四、问题分析自限式电伴热带内部都是相当于无数个发热电阻的并联回路(图8)组成自调控发热内芯。
从下图中的“冷、暖、热”区域可以看出在低温时导通路径增多,从而允许更大的电流流经母线,在高温时聚合物扩张,导通路径减少,从而减少了伴热线的功率输出(图9)。
nVent RAYCHEM长线电热溯理系统说明书
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This section provides an overview and general design guidelines fornVent RAYCHEM longline heat tracing systems. For complete design assistance,contact your nVent representative or visit our website at /RAYCHEM.ContentsINTRODUCTION (1)SELF-REGULATING HEATING CABLES (2)LBTV (2)SERIES RESISTANCE MINERAL INSULATED HEATING CABLES (3)MI (3)SERIES-RESISTANCE POLYMER INSULATED HEATING CABLES (4)SC (4)SKIN-EFFECT HEAT-TRACING SYSTEM (5)STS (5)LONGLINE SYSTEM SELECTION (6)INTRODUCTIONHeating long pipelines for freeze protection, viscosity control, or temperaturemaintenance presents special requirements for electrical heat tracing. Theseapplications require long electrical circuit lengths, usually with a single electricalpower point. nVent RAYCHEM provides a wide range of industry-proven solutionsfor these applications. Extreme long lines are usually transfer lines betweenprocessing plants or to storage or transportation facilities. Tank farms, piersfor ocean transport vessels, and pipes between petrochemical facilities are allexamples of applications for which longline heat tracing may be used. Even if aprocessing plant uses steam for in-plant heat tracing, electrical tracing may bebeneficial for these transfer lines.Typical applications for longline heating systems include:• Water and steam condensate lines• Water supply and injection lines• Sewage lines• Natural gas gathering lines (condensation prevention)• Crude oil gathering lines (viscosity control)• Off-site crude and fuel oil lines• Temperature-sensitive lines• Product transfer linesLongline tracing systems can be complex to design and install. For this reasonnVent RAYCHEM offers several technologies to choose from, thus providing thebest cost optimization for your project. These technologies are:• Self-regulating heating cables• Series resistance mineral insulated heating cables• Series-resistance polymer insulated heating cables• Skin-effect tracing systems (STS)All longline heat tracing should be designed with engineering support from nVent.For assistance in selecting the best technology for the application, contact yournVent representative.SELF-REGULATING HEATING CABLESnVent RAYCHEM LBTVFig. 1 LBTV heating cableLBTV heating cables provide electrical freeze protection and temperaturemaintenance up to 150°F (65°C) for long piping systems in both nonhazardousand hazardous locations. This single-phase, self-regulating heating cableprovides freeze protection and low-temperature maintenance for medium-lengthapplications. The parallel circuit design results in a cable that can be cut to lengthin the field.Within the circuit length limitations, the heat output per foot is independent ofcircuit length. The cable is constructed with 10 AWG copper bus wires, permittinglonger circuit length with less voltage drop than the 16 AWG BTV cable bus wires.These heating cables maintain process temperatures up to 150°F (65°C) and canwithstand intermittent exposure to temperatures up to 185°F (85°C). They areapproved for use in nonhazardous and hazardous locations, including areas wherecorrosives may be present.Refer to the data sheets for more detailed information. Data sheets can be foundon /RAYCHEM, or the Technical data sheet section of the IndustrialHeat Tracing Solutions Products & Services Catalogue (H56550).Fig. 2 MI heating cablenVent RAYCHEM mineral insulated heating cables are used in longline applications where high maintain temperatures and/or high exposure temperatures exist, or high power output is required. MI heating cable is used in many applications, including transfer lines. It is rugged and economical, and can be used for lines up to 5000+ feet (1500+ m).A 600-Vac Delta or Wye electrical configuration balances the electrical load well. Designs must be done on a case-by-case basis because the total resistance must be matched to the transformer characteristics.Refer to the Mineral Insulated Cables design guide (H56884) for more detailed information.circuit lengths exceed the ratings of conventional parallel-resistance heating cables and a single power source is needed. Ohmic heating of the conductor provides the heat in this series circuit heating cable. Engineering design by nVent is required since the wattage output depends on the total circuit length and the voltage applied.SC cables are available in single-, double-, and triple-conductor configurations for single- or three-phase system designs. The resistance conductors are electrically isolated with high-temperature, heavy-wall fluoropolymers; a grounding braid; and a final fluoropolymer jacket. Maximum exposure temperatures are 400°F (204°C) for SC cables, 482°F (250°C) for SC/H cables, and 195°F (90°C) for SC/F cables. SC cables are capable of supporting circuit lengths up to 12,000 feet (3659 m) with one power supply point, and voltages up to 600 Vac.SKIN-EFFECT HEAT-TRACING SYSTEMnVent RAYCHEM STSFig. 4 Skin-effect Tracing System (STS)nVent RAYCHEM skin-effect tracing systems (STS) are custom engineered bynVent for each unique application and are ideally suited for long transfer pipelinesover one mile (1.6 km) in length, and for individual circuit lengths up to 31 miles(50 km) in length. Consideration is given to transformer power requirements,control and monitoring designs, conductor wire selection, and the installation ofthe complete system. In the STS heating system, heat is generated on the innersurface of a ferromagnetic heat tube that is thermally coupled to the pipe to beheat traced. An electrically insulated, temperature-resistant conductor is installedinside the heat tube and connected to the tube at the far end. The tube andconductor are connected in series to an AC voltage source. This method of heatingis called skin-effect heating because the return path of the circuit current is pulledto the inner surface (approximately 1 mm) of the heat tube by both the skin effectand the proximity effect between the heat tube and the conductor. The outsidesurface of the heat tube is at ground potential, while the inner surface of the tubecarries full current.Insidesurface toconductorOutsidesurfaceto earthFig. 5 nVent RAYCHEM STS cross sectionThe STS circuit impedance is mainly resistive, generating heat in the heat tubewall and, to a lesser extent, in the insulated conductor. Additional heat results fromeddy currents induced in the heat tube wall.The allowable circuit length is determined by the power output, heat tube size,conductor size, and the carrier pipe temperature. STS cables are available in twodifferent temperature ratings, 302°F (150°C) and 482°F (250°C), and three voltageratings, 2,500V, 5,000V and 10,000V. These cables are also available in differentconductor sizes for design and installation efficiency. The highest installed costcomponent in electrical heat-tracing systems is often the power distributionsystem. This is especially true for long lines where power feeds are unavailable.A nVent RAYCHEM STS system minimizes the number of power supply pointsrequired by offering the longest circuit lengths available to the industry.LONGLINE SYSTEM SELECTIONnVent provides a broad range of options for heat-tracing long lines. Decisionvariables include maintenance temperature, heat-loss circuit length, maximumexposure temperature, power availability, piping system support and construction,thermal insulation k values, and local codes and standards. Use the following tablefor preliminary cable selection and contact nVent for complete system design andoptimization.TABLE 1 SYSTEM CHARACTERISTICS MATRIXNorth AmericaTel +1.800.545.6258Fax +1.800.527.5703**********************Latin America Tel +1.713.868.4800Fax +1.713.868.2333**********************©2022 nVent. All nVent marks and logos are owned or licensed by nVent Services GmbH or its affiliates. All other trademarks are the property of their respective owners. nVent reserves the right to change specifications without notice.。
nVent RAYCHEM E507S-LS热 tracing系统温控器说明书
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proper operation and to prevent shock or fire. Read these important warnings and carefully follow all the installation instructions.only. Do not use substitute parts or vinyl electrical tape to make connections.3⁄4 in E507S-LSLine-Sensing Thermostat for Hazardous Locations Installation InstructionsFigure 4. Contactor controlFigure 1. Pipe-sensingFor switching heat-tracing loads greater than 22 A or switching multiple heat-tracing circuits.ØØControl thermostatControl thermostatGFEPD208-V or 240-V supply – 240-V heater Figure 2. Low-temperature alarm ØØControl thermostat GFEPD208-V or 240-V supply Figure 3. High-temperature alarmØØControl thermostatGFEPD208-V or 240-V supply WIRINGINSTALLING THE THERMOSTAT1. Verify that the thermostat issuitable for the area where it is to be installed. 2. Check the line voltage and theheat-tracing load to ensure that the thermostat ratings are not exceeded.3. Mount the unit using unistrut or the RAYCHEM universal mounting bracket (UMB-263757) in a position that prevents condensation from draining into the enclosure from the connecting conduit (see diagram above).POSITIONING THE SENSOR BULB4. Position the bulb in the lower quadrant of the pipe as shown in the diagrams to the left. Place the bulb at least three feet from pipe supports, valves, or other heat sinks; protect the capillary from kinks or bends less than 1⁄2 inch in radius.5. Tape the bulb firmly to the pipe with AT-180 aluminum tape, making sure there is no air space between the bulb and pipe. Do not overlap the bulb and heating cable with the same piece of AT-180 tape.6. For metal-tank-wall sensing, use the BCK-35 bulb clamp(purchased separately) and install the clamp per the instructions provided. Make sure there is no air space between the tank wall and the bulb.For installation on plastic tanks, contact nVent at (800) 545-6258.SETTING THE THERMOSTAT7. Set the thermostat dial to the desired temperature, then finish wiring.8. Complete insulating. Do not turn the system on until the bulb is covered with thermal insulation.9. Fill the piping or tank. Once the thermostat has begun to cycle, check the fluid temperature with an immersed thermostat (best for plastic systems) or an accurate temperature indicator. Adjust the dial setting if necessary.North AmericaTel +1.800.545.6258Fax +1.800.527.5703**********************Europe, Middle East, AfricaTel +32.16.213.511Fax +32.16.213.604**********************Asia PacificTel +86.21.2412.1688Fax +86.21.5426.3167*************************Latin AmericaTel +1.713.868.4800Fax +1.713.868.2333**********************PN 137863。
电伴热-瑞侃raychem
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最最高高维维持持 温温度度
6655 ℃℃
111100 ℃℃
112200 ℃℃
6655 ℃℃ 111100 ℃℃ 112200 ℃℃ 6655 ℃℃ 6655 ℃℃ 6655 ℃℃ 112200 ℃℃
Self-regulating heating cable
最最高高曝曝露露 温温度度
8855 ℃℃
最最长长回回路路 长长度度
220000 mm
111100 ℃℃
112200 mm
221155 ℃℃
222200 mm
8855 ℃℃ 111100 ℃℃ 221155 ℃℃
8855 ℃℃ 8855 ℃℃ 8855 ℃℃ 221155 ℃℃
220000mm 112200mm 222200mm
330000 mm 666600 mm 11550000 mm 22000000 mm
装时除上述专业外还涉及非常重要的环节-保温,应做好各专业的协
调、衔接才能保证电伴热系统达到预期的伴热效果。
17
六、电伴热设计及软件应用
• 电伴热设计-设计参数:
TM维持温度:管道内流体必须维持的温度 TC暴露温度:一般是指最高连续暴露温度,有时也叫最高连续承受温 度,指伴热带或电伴热系统中的某一部件在断电情况下长时间所能承受的 最高温度 。 TA最低环境温度:应指所设计项目的极端最低温度,在某些情况下也可 指月平均最低温度。 环境条件,如是否为酸、碱、盐雾等腐蚀性环境 。 爆炸性危险区域:采用NEC还是IEC的分区方式 。 要求附件的防护等级,如电源接线盒 Exe Exd。 温度控制要求,用温控器控制、采用机械式管线温控器或电子温控器。
10
五、主要产品介绍
• Raychem 电伴热产品-限功率伴热线特性(VPL)
电伴热施工及维护要点
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实用文档
十一、其他相关
绝缘电阻测试和 记录
实用文档
十一、其他相关
管道的预安装检查 1、按照施工进度计 划 2、查看系统定路径
实用文档
十一、其他相关
实用文档
十一、其他相关
伴热带的固定及附件安装
实用文档
十一、其他相关
伴热带的固定及附件安装
实用文档
十一、其他相关
实用文档
十一、其他相关
实用文档
实用文档
五、绝热层、防潮层及保温层材料选用
绝热材料及制品,选择要求:
1)测量管线的绝热材料应由阻燃材料组成,测量 管线的绝热层宜选用绝热制品; 2)保温材料及其制品的允许使用温度应高于测量 管线和伴热管线的设计温度; 3)保冷材料及其制品的允许使用温度应低于测量 管线的设计温度;
实用文档
五、绝热层、防潮层及保温层材料选用
Raychem(美国瑞侃)电伴热施工 及维护要点
实用文档
主要内容
1、伴热 2、绝热 3、伴热绝热的设计原则 4、仪表测量管线的保温结构 5、绝热层、防潮层及保温层材料选用 6、吕四电伴热带选型简介(仅介绍中温) 7、电伴热系统 8、电伴热带安装 9、保温层、保护层安装 10、一些安装示意图
实用文档
实用文档
六、吕四电伴热带选型简介(仅介绍中 温)
瑞侃XTV2-CT型自控电伴热带专用于: 需间歇性高温蒸汽吹扫(最高215℃)的工艺管线、 容器储罐或测量仪表管线的防冻和保温。适用于 普通区、危险区或腐蚀区。
产品序列如下:
实用文档
六、吕四电伴热带选型简介(仅介绍中 温)
实用文档
六、吕四电伴热带选型简介(仅介绍中 温)
实用文档
五、绝热层、防潮层及保温层材料选用
暖化系统维护指南说明书
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Cooling System4. Remove the reserve tank from its holder by pulling it straight up.Drain the coolant, then put the tank back in its holder.5. When the coolant stops draining,tighten the drain plug in the bottom of the radiator.6. Mix the recommended antifreeze with an equal amount of purified or distilled water in a clean container. The cooling system capacity is:With 5-speed manual transmission:0.82 US gal (3.1 ,0.68 Imp gal)With automatic transmission:0.79 US gal (3.0 ,0.66 Imp gal)7. Pour coolant into the radiator up to the base of the filler neck.Start the engine and let it run for about 30 seconds. Then turn off the engine.MaintenanceRESERVE TANKRESERVE TANK CAPHOLDERFILLER NECKFill up to hereCooling System8. Fill the reserve tank to the MAX mark. Install the reserve tank cap.9. Check the level in the radiator,add coolant if needed.10.Install the radiator cap, and tighten it to the first stop.11.Start the engine and let it run until the cooling fan comes on two times. Then stop the engine.12.Remove the radiator cap. Fill the radiator with coolant up to the base of the filler neck.13.Start the engine and hold it at 1,500 rpm until the cooling fan comes on. Turn off the engine.Check the coolant level in theradiator and add coolant if needed.14.Install the radiator cap, and tighten it fully.15.If necessary, fill the reserve tank to the MAX mark. Install the reserve tank cap.MaintenanceRESERVE TANKWindshield WashersCheck the level in the windshield washer reservoir at least monthly during normal usage. In bad weather,when you use the washers often,check the level every time you stop for fuel. This reservoir supplies the windshield and rear window washers.The windshield washer reservoir is located behind the driver's sideheadlight. Check the reservoir's fluid level by removing the cap andlooking at the level gauge attached to the cap.Canadian ModelsThe low washer level indicator will light when the level is low (see page 54).Fill the reservoir with a good-qualitywindshield washer fluid. Thisincreases the cleaning capability and prevents freezing in cold weather.When you refill the reservoir, clean the edges of the windshield wiper blades with windshield washer fluid on a clean cloth. This will help to condition the blade edges.Do not use engine antifreeze or a vinegar/water solution in the windshield washer reservoir.Antifreeze can damage your car's paint,while a vinegar/water solution can damage the windshield washer e only commercially-available windshield washer fluid.MaintenanceLEVEL GAUGENOTICETransmission FluidAutomatic TransmissionCheck the fluid level with the engine at normal operating temperature.1. Park the car on level ground. Shut off the engine.2. Remove the dipstick (yellow loop)from the transmission and wipe it with a clean cloth.3. Insert the dipstick all the way into the transmission securely as shown in the illustration.4. Remove the dipstick and check the fluid level. It should be between the upper and lower marks.5. If the level is below the lower mark, add fluid into the filler hole to bring it to the upper mark.Always use Honda PremiumFormula Automatic Transmission Fluid (ATF). If it is not available,you may use a DEXRON ® III automatic transmission fluid as a temporary replacement. However,continued use can affect shift quality. Have the transmission drained and refilled with Honda ATF as soon as it is convenient.6. Insert the dipstick all the way back into the transmission securely as shown in the illustration.The transmission should be drained and refilled with new fluid according to the time and distance recommen-dations in the maintenance schedule.MaintenanceDIPSTICKUPPER MARK LOWERMARKTransmission Fluid, Brake and Clutch FluidCheck the fluid level with the transmission at normal operating temperature and the car sitting on level ground. Remove thetransmission filler bolt and carefully feel inside the bolt hole with your finger. The fluid level should be up to the edge of the bolt hole. If it is not, add Genuine Honda Manual Transmission Fluid (MTF) until it starts to run out of the hole. Reinstall the filler bolt and tighten it securely.If Honda MTF is not available, you may use an API service SG, SH or SJ grade motor oil with a viscosity of SAE 10W-30 or 10W-40 as a temporary replacement. An SG grade is preferred, but an SH or SJ grade may be used if SG is not available. However, motor oil does not contain the proper additives and continued use can cause stiffer shifting. Replace as soon as convenient.The transmission should be drained and refilled with new fluid according to the time and distance recommen-dations in the maintenance schedule.Brake and Clutch FluidCheck the fluid level in the reser-voirs monthly. There are up to two reservoirs, depending on the model.They are:Brake fluid reservoir (all models)Clutch fluid reservoir(manual transmission only)The brake fluid should be replaced according to the time and distance recommendations in the mainte-nance schedule.FILLER BOLTCorrect level5-speed Manual TransmissionMaintenanceBrake and Clutch FluidAlways use Genuine Honda DOT 3brake fluid. If it is not available, you should use only DOT 3 or DOT 4fluid, from a sealed container, as a temporary replacement. However,the use of any non-Honda brake fluid can cause corrosion and decrease the life of the system. Have the brake system flushed and refilled with Honda DOT 3 brake fluid as soon as possible.Brake fluid marked DOT 5 is not compatible with your car's braking system and can cause extensive damage.Brake SystemThe fluid level should be between the MIN and MAX marks on the side of the reservoir. If the level is at or below the MIN mark, your brake system needs attention. Have the brake system inspected for leaks or worn brake pads.Clutch SystemThe fluid should be between the MIN and MAX marks on the side of the reservoir. If it is not, add brake fluid to bring it up to that level. Use the same fluid specified for the brake system.Low fluid level can indicate a leak in the clutch system. Have this system inspected as soon as possible.MaintenanceMAXMIN MAXM INPower SteeringOn DX model and CX model with automatic transmissionCheck the level when the engine is cold. Look at the side of the reservoir. The fluid should be between the UPPER LEVEL and LOWER LEVEL. If it is below the LOWER LEVEL, add power steering fluid to the UPPER LEVEL.Always use Genuine Honda Power Steering Fluid. If it is not available,you may use another power steering fluid as an emergency replacement.However, continued use can cause increased wear and poor steering in cold weather. Have the powersteering system flushed and refilled with Honda PSF as soon as possible.A low power steering fluid level can indicate a leak in the system. Check the fluid level frequently and have the system inspected as soon as possible.Turning the steering wheel to full left or right lock and holding it there can damage the power steering pump.MaintenanceUPPER LEVELLOWER LEVELNOTICEAir Cleaner ElementThe air cleaner element should be replaced according to the time and distance recommendations in the maintenance schedule.ReplacementThe air cleaner element is inside the air cleaner housing in the engine compartment.To replace it:1. Unsnap the four clips and remove the air cleaner housing cover.2. Remove the old air cleaner element.3. Carefully clean the inside of the air cleaner housing with a damp rag.4. Place the new air cleaner element in the air cleaner housing.5. Reinstall the air cleaner housing cover, snap the four clips back into place.MaintenanceCLIPSAIR CLEANER ELEMENT。
电伴热施工及维护要点共51页文档
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2、要冒一次险!整个生命就是一场冒险。走得最远的人,常是愿意 去做,并愿意去冒险的人。“稳妥”之船,从未能从岸边走远。-戴尔.卡耐基。
梦 境
3、人生就像一杯没有加糖的咖啡,喝起来是苦涩的,回味起来却有 久久不会退去的余香。
电伴热施工及维护要点 4、守业的最好办法就是不断的发展。 5、当爱对你的记忆,我不求天长地久的美景,我只要生生世世的轮 回里有你。
谢谢你的阅读
❖ 知识就是财富 ❖ 丰富你的人生
71、既然我已经踏上这条道路,那么,任何东西都不应妨碍我沿着这条路走下去。——康德 72、家庭成为快乐的种子在外也不致成为障碍物但在旅行之际却是夜间的伴侣。——西塞罗 73、坚持意志伟大的事业需要始终不渝的精神。——伏尔泰 74、路漫漫其修道远,吾将上下而求索。——屈原 75、内外相应,言行相称。——韩非
电伴热-瑞侃raychem
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Self-regulating heating cable
五、主要产品介绍
• Raychem 电伴热产品-自调控电伴热线外观
BTV QTV
Self-regulating heating cable
XTV
9
五、主要产品介绍
• Raychem 电伴热产品-自调控电伴热线型号参数
应应用用
系系列列
防防冻冻 防防冻冻及及低低温温维维持持 高高温温度度维维持持
27
六、电伴热设计及软件应用
• 电伴热设计-初步设计阶段
各专业需提供的条件: ¾工艺专业:工艺自控流程图和管线表,在管线表中如可能 应注明管线的暴露温度 ¾配管专业:根据管线表,估算其中伴热管线的长度 ¾电气专业:完成伴热设计计算书中设计条件交给我们进行 选型、计算,从而可以估算出系统总电量、电伴热所需的容 量、配电柜的数量及尺寸,并确定伴热回路的控制方式。电 伴热系统参数的准确性取决于配管专业提供的管线长度
最最高高维维持持 温温度度
6655 ℃℃
111100 ℃℃
112200 ℃℃
6655 ℃℃ 111100 ℃℃ 112200 ℃℃ 6655 ℃℃ 6655 ℃℃ 6655 ℃℃ 112200 ℃℃
Self-regulating heating cable
最最高高曝曝露露 温温度度
8855 ℃℃
最最长长回回路路 长长度度
10
五、主要产品介绍
• Raychem 电伴热产品-限功率伴热线特性(VPL)
高功率输出 高暴露温度 缠绕并联结构允许任意剪切 可单次交叉重叠安装 耐高温外护套 能承受 250℃ (断电时) 输出功率随温度上升而降低
Power Limiting heating cable
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每一回路的资料都应记录在安装记录单上
2
设计参数
应用环境: 室内
介质名称: 维持温度: 最低环境温度: 最高环境温度: 正常操作温度:
551-0001。。05CC。。CC
环境防爆等级: CID II
电压等级:
220V
管道材料:
碳钢 (DN)
室外
X
材料清单
保温材料名称: 材料保温系数:
岩棉 0.038W/m。C (@10。C)
Traced),另更需注明所有配件的位置。
* 在小于100mm外径的管道上,保温层内径应加大
13mm。
(九) 温控系统的安装(Installing Controls)
(A) 环境感应温控器 (Ambient Sensing Thermostats)
* 按设计要求采用适当的温控器,并应达防水,防爆等级 * 按要求电压供电 * 温控器应尽可能安装于最冷最当风的位置。
* 测试后将温控器调至原需的指数
(B) 对用管道感应温控器控制的系统
* 将温控器微调至回路供电的状态 * 使回路供电至达到温控器所调校的温度止 * 测量每一回路的电压,电流,环境温度,管道温度,并将
资料记录在安装记录单上。
(C) 对后备系统的测试如上,但每次只测试其一系统。
(十一) 安装记录单(参考图1.6)
Ohms
2500 Vdc
500 Vdc
1000 Vdc
2500 Vdc
(Vac) (Vac) (Amps) (°F) (watts/ft)
Ohms
Ohms
Ohms
Ohms
9
FM要求的I类1区危险场所安装记录
为了通过FM的认证过程,必须以下填写内容并 提交泰科热控用户服务中心 (传真:(800) 527-5703)。 公司名称 电路标识号
Ohms
Ohms
Ohms
Ohms
8
安装与检验记录
泰科热控工业电伴热系统安装与检验记录
设备名称 回路编号 伴热线型号 回路长度
检验日期
试运行
目视检查
目视检查伴热线的连接部位是否有过热、腐蚀、 受潮、连接松动或其他问题。
在整个回路上检查电气连接、接地和母线绝缘情况。
保温层是否潮湿或缺失;保护层或防水层是否损 坏、缺失或变形;填密处是否有裂缝。 保温层或保护层上是否正确标识终端密封、两通和 三通的部位。
(二) 施工前准备工作(Preparation): (A) 管道系统 1. 管道系统与配备都已施工完毕 2. 防锈防腐涂层已干透 3. 管道系统施工和规格与设计图中所示一致 4. 锉去所有毛刺和利角 (B) 伴热线和配件 1. 伴热线表面有否损破 2. 伴热线的绝缘性能良好(要求用摇表在2500VDC 测试时绝缘电阻为20MΩ)(越大越好) 3. 伴热线与所有配件的型号与设计要求一致。 (C) 现场准备(参考图1.2)
试验A (编织层-管道)
功率检查 回路电压
控制盘 回路端部* 通电10 min后电流 管道温度 功率=电压×电流/英尺 * 仅适用于试验运行
500 Vdc 1000 Vdc
Ohms
2500 Vdc
500 Vdc
1000 Vdc
2500 Vdc
(Vac) (Vac) (Amps) (°F) (watts/ft)
第三章: 维修
31
2.20 JBM-100-E/JBM-100-A多功能电源接线盒安装说明
38
2.21 S-150-E两通接线盒安装说明
46
2.22 T-100两通及三通接线盒
50
2.23 E-150-E尾端安装说明
55
2.24 E-100-A尾端的安装说明
57
2.25 E-100-L带灯尾端的安装说明
自调控电伴热系统 安装与操作手册
目录
第一章:自调控电伴热的安装和测试
1
施工前准备工作
2
单根伴热线施工法
5
多根伴热线施工法
7
安装记录单
8
第二章:伴热线及配件安装细节
11
2.1 伴热线安装位置
12
2.2 缠绕安装
132.3 管道支架源自142.4 管道吊架
15
2.5 管道弯头
16
2.6 孔板
17
2.7 管道三通
时用
(七) 保温材料安装前的检查和测试 (Pre-Insulation Inspection and Testing) 伴热回路安装完成后应立即进行以下的检查和测试
* 视察伴热线表面是否损伤 * 视察所有配件是否安装完整 * 用摇表(Meggar)2500VDC摇试回路一端,绝缘电
阻20MΩ以上。注意摇试时间应在一分钟,供电 电缆对金属屏蔽摇试
(B) 管道感应温控器(Line-Sensing Thermostats)
* 按设计要求采用适当的温控器,并应达防水,防爆等级 * 按要求电压供电 * 感应器与管道紧贴并远离伴热线,并至少离开散热体
1m以上
* 感应器应安装于较隐蔽地方以免受损 * 温控器应加以适当的调校
(十) 最后测试(Final Testing)
* 视察所有管道,保温层和所有配件的安装都没有问题。 * 将所有回路的空气开关关闭。 * 用摇表对每一回路摇试一次。
(A) 对用环境感应温控的控制的系统
* 将温控器调至回路供电的状态 * 对回路进行4小时的供电使管道温度达到一平衡状态 * 测量每一回路的电压,电流,环境温度,管道温度,并将
资料记录在安装记录单上。
1.设计图指明缠绕系数为2、3或以上,一般采用于大 口径管道上,有以下两种方法:
(A) 各种热线由各独立的线圈取出(参考图1.5): * 散热体所需伴热线长度由一伴热回路供给。 * 各回路轮流供给沿管道回路各散热体所需的伴热线。 (B) 各伴热线由同一线圈取出(较少采用) * 伴热线由管道回路一端起布线至尾端再回头至起点。 * 各散热体所需伴热线长度由其一回路供给。 * 供电点只有回路的一端
18
2.8 管道托架
19
2.9 地面以下管道
20
2.10 闸阀
21
2.11 球阀
22
2.12 止回阀
23
2.13 外壳泵
24
2.14 离心泵
25
2.15 过滤器
26
2.16 水位开关仪
27
2.17 液面指示器
28
2.18 压力表
29
2.19 JBS-100-E/JBS-100-A单进线电源接线盒安装说明
61
2.26 PMKG-LSC两通接线盒
66
2.27 PMKG-LTC三通接线盒
70
2.28 PMKG-LEC尾端密封接线盒
74
2.29 E507S-LS危险区域用管线感温探头式温控器安装说明
76
2.30 NGC-20-C-E和NGC-20-CL-E电子式伴热控制器
2.31 NGC-20的安装
电路准备就绪,可进行试运行
填写
批准
订购合同号 参考图纸
危险场所分级
电路长度 温度组别 接头 终端密封
设备跳闸能力
校准日期 测得值
测得值
日期 日期
公司 公司
10
签名 签名
日期 日期
第二章:伴热线及配件安装细节 (Installation Details)
2. 尽可能将伴热线附在管道的下半方 3. 在回路的每一供电点和尾端各预留60cm长的伴热线 4. 按设计图所示「缠绕系数」布线 5. 所有散热体(参考图1.4)(如支架、阀门、法兰等)应
按设计图要求预留所需伴热线长度,将此段伴热 线缠绕于散热主体上并固定。下列各点应注意 * 散热体应有设计所需的伴热长度 * 伴热线可互相重叠 * 缠绕方法应尽可能使散热体必要时可随时拆除进 行维修或更换而不损坏伴热线或影响其他回路。 * 在使用两通或三通配件处,伴热线各端应预留 60cm长度。
检查控制监视系统是否受潮或腐蚀;设定点和开 关工作是否正常;毛细管是否损坏;故障接地保 护设备工作是否正常。
绝缘电阻试验 试验A (母线-编织层)
试验A (编织层-管道)
功率检查 回路电压
控制盘 回路端部* 通电10 min后电流 管道温度 功率=电压×电流/英尺 * 仅适用于试验运行
500 Vdc 1000 Vdc
区域 自燃温度 电伴热电路 伴热线型号 电源电压 最大管道温度 部件 电源接口 三通
接地故障保护 制造商/型号
安装说明 所有部件均符合制造商的技术规范: 密封接头打开检查浇注是否正确: 接地故障保护设备试验:
绝缘电阻试验 自调控和自限功率伴热线试验电压2500Vdc 使用仪器 在管道上安装保温层前测量* 导体与编织层之间的绝缘电阻(试验A) 编织层与管道之间的绝缘电阻(试验B) 在管道上安装保温层后测量* 导体与编织层之间的绝缘电阻(试验A) 编织层与管道之间的绝缘电阻(试验B) * 最小绝缘电阻必须为1000 MΩ
* 将摇试结果记录在安装记录单上
(八) 保温层安装(Installing Thermal Insulation) 伴热线施工测试后立即进行保温层安装,并注 意以下各点:
* 所采用保温层的材料,厚度和规格与设计图要求
符合
* 施工时管道、保温材料必须干燥 * 保温层外应加防水外罩 * 保温层施工时应避免损伤电热线 * 保温层施工后应立即对电热线进行绝缘测试 * 在保温层外加标签注明“内有伴热线”(Electrical
1. 将一卷伴热线与卷筒放置于一支架上,并放置 在回路其中一端附近。
2. 沿管道布伴热线并避免下列事项: * 放置伴热线于毛刺和利角上 * 用力拉扯伴热线 * 脚踏或重物放置伴热线上
(三) 单根伴热线施工法(Single Heater Cable) (参考图1.3)