RN2高压限流熔断器使用说明书
熔断器产品说明书
一、西安西熔电力科技有限公司1、3.6-40.5kv高压限流熔断器本产品适用于户内50Hz，额定电压3.6-40.5ｋV系统作为电压互感器的过载或短路保护之用，（通过国家高压电器质量监督检测中心试验，产品符合GB/T15166.2和IEC60282-1）。
（1）型号（2）基本参数熔断器的基本参数如表：（3）外型及安装尺寸熔断器的外型及安装尺寸如(图3)和表2所示；2、40.5KV高压限流熔断器40.5KV高压限流熔断器本产品适用于户内交流50Hz，额定电压40.5kV电力系统，作为高压电力变压器及其它电力设备过载或短路等保护元件，还可与其它保护电器（负荷开关，真空断路器等）配合使用。
（1）型号（2）基本参数熔断器的基本参数如表：（3）外型及安装尺寸熔断件的外型尺寸如（图3）熔断器的外型及安装尺寸如（图4）：（4）熔断器的选用用于变压器初级端熔断器的一般选用原则见表：3、RN系列高压交流熔断器RN系列高压交流熔断器本系列高压交流熔断器适用于户内交流50Hz，额定电压3kV-35kV电力系统，用于对电力线路、变压器、电压互感器及其它电器的过载及短路保护，亦可用以保护电力系统分出的支路，当线路短路电流达到最大值之前熔断器就将线路切断。
（1）型号熔断器的基本参数如表：表一注：*号为双拼管表二注：*号为双拼管（3）外型及安装尺寸RN1、RN3型户内高压熔断器外形尺寸如(图1)、(图2)和表3所示；图1图2 表三( )为RN,RN3-6外形尺寸RN2型户内高压熔断器外形尺寸如(图3)、(图4)及表4图3图4表四。
供电实验报告
一、实验目的熟悉高低压电器、高低压成套配电装置的结构、功能, 了解其技术特性。
二、实验主要仪器与设备各种高低压电器设备、高低压成套配电装置。
三、实验原理（一）高压熔断器熔断器是常用的一种简单的保护电器。
当通过它的电流超过规定值并经过一定的时间后熔体熔化, 从而切断电流, 对线路及设备进行短路保护或过负荷保护。
1. 户内高压熔断器①RN1和RN2型高压管式熔断器。
RNl 及RN2型熔断器结构如图1-1所示, 主要由熔管、触座、动作指示器、绝缘子、石英砂填料和底座组成。
图1-1 RNl 及RN2型熔断器结构图 短路电流通过时, 并联铜丝熔断产生电弧, 电弧在充满石英砂填料的熔管内燃烧, 灭弧过程中利用了粗弧分细、长弧切短、狭沟灭弧和冷却灭弧等灭弧方法。
②XRNT 、XRNP 型高压限流熔断器。
XRNT 、XRNP 型高压限流熔断器结构如图1-2所示。
（a ）外形图 （b ）剖面图图1-2 高压限流熔断器的结构图（b ）熔管剖面图（a ）外形图熔断器本体主要由瓷质熔管、丝状或片状熔体、高纯度石英砂、瓷芯柱、撞击器等组成。
熔断器依靠石英砂对电弧的吸热和游离气体向石英砂间隙扩散的作用进行灭弧, 同时可利用冶金效应形成串联电弧, 将长弧切短加速灭弧。
熔丝熔断时, 撞击器迅速弹出, 驱动连锁电器（常用负荷开关）的脱扣器而使开关跳闸或并发出熔断信号。
２、户外高压跌开式熔断器如图1-3所示为RW4-10（G）型跌落式熔断器结构。
熔断器熔管外层为酚醛纸管或环氧玻璃布管, 内套纤维质消弧管, 其灭弧原理为: 短路电流使熔体熔断, 形成电弧, 电弧灼烧消弧管内壁, 产气纵吹电弧而熄灭。
如图1-4所示为RW10-10F跌开式熔断器。
在一般跌开式熔断器的上静触头上加装了一个简单的灭弧室, 因而可以带负荷操作, 相当于负荷开关。
图1-3RW4-10(G) 型跌落式熔断器图1-4 RW10-10负荷型跌开式熔断器（二）高压隔离开关高压隔离开关是一种没有灭弧装置的开关电器, 其功能主要是隔离高压电源, 以保证对其他电气设备检修工作的安全。
电能中高压熔断器说明书
18Medium Voltage FusesMedium Voltage Fuses18 Medium Voltage FusesProduct Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V12-T18-2Product History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V12-T18-2Product History Time Line. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V12-T18-2Product Application and Naming. . . . . . . . . . . . . . . . . . . . . . . . . . . . . V12-T18-3Current-Limiting Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V12-T18-4Expulsion Fuses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V12-T18-5Product Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V12-T18-6Further Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V12-T18-8Pricing Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .V12-T18-81818Medium Voltage FusesCurrent-Limiting and Expulsion FusesCurrent-Limiting andExpulsion FusesOriginally aWestinghouse ProductMedium Voltage FusesProduct DescriptionEaton medium voltagefuses offer such a range ofcharacteristics that almostany fuse application, withinthe practical range of suchinterrupting devices, maybe satisfied. This range ofcharacteristics is offeredin part by the production ofboth expulsion and current-limiting power fuses.Expulsion and current-limitingfuses provide such diversecharacteristics by employingdifferent areas of fusetechnology. These differencesin technology, along with thediverse characteristics, requirethat different questions beanswered when applyingexpulsion and current-limiting fuses.Product HistoryThe Eaton power fuse productline was introduced in the1930s by WestinghouseElectric Corporation. As powersystems grew in size, the needto sectionalize utility feedersand to protect equipmentbecame apparent. The initialfuse development effortsresulted in the creation ofnon-current-limiting, expulsiontype fuses. As the availablefault currents grew, the needfor a current-limiting fuse wasapparent and this resulted innew interruption techniques.While basic fuse technologyhas not changed greatlyover the years, gradualimprovements have beenmade to make the fusesmore current-limiting andeasier to manufacture andinstall. Because standardsfor fuses (ANSI C37) detailonly test methods and basicperformance requirements,many different varieties offuses (length, diameter, short-circuit interruption curves)have been introduced overthe years.Eaton presently manufacturesmedium voltage fuses inHaina, DR.Product History Time LineFuses in PerspectiveAdvantagesMedium Voltage Fuse ComparisonNotes1BAL superseded by CLE.2BAL-R superseded by CLS.3BA—Refills and holders only, new installations use RBA.4DBA—Refills only.5DBS—Superseded by DBU.VoltageTypeClassApplicationAmp RatingExpulsion Current-LimitingVented SealedElectromechanical StaticExpels gases/noise No gases/noiseInterrupts at natural current zero Limits fault currentGenerally higher voltage/current applications Generally higher interrupting ratingsDifferences in time/current characteristics Differences in time/current characteristics1818Medium Voltage FusesCurrent-Limiting and Expulsion FusesApplication GuideGuide to NamesBCLS—Bolt-in version of CLS fuse .BHLE—Bolt-in version of HLE fuse.CLE —Current-limiting E-rated.HLE/HCL —Current-limiting E-rated, interchangeable with General Electric and Gould Shawmut.CX/CXN —Current-limiting interchangeable with McGraw-Edison’s NX brand fuses, C-rated.CLT —Current-limiting transformer fuse.CLPT —Current-limiting E-rated for potential transformers.CLS —Current-limiting for motor starters, R-rated.RBA —Refillable boric acid expulsion fuse (indoor use).RDB —Refillable dropout boric acid expulsion fuse (outdoor use).DBU —Dropout boric acid fuse interchangeable with S&C’s SMU-20 refill.Guide to Ampere Ratings“E” DesignationFuse rated 100E or below will melt in 300 seconds at a current value between 2.0 and 2.4 times the E number.Fuse rated above 100E will melt in 600 seconds at a current value between 2.2 and 2.64 times the E number.If the current is higher than 2.4 or 2.64 times the E number, the user must consult the time-currentcurves for that particular fuse.“R” DesignationThe fuse will melt in 15 to 35 seconds when the current equals 100 times the R number.If the current is higher than 100 times the R number, the user must consult the time-current curves for that fuse.“C” DesignationThe fuse will melt in1000 seconds at a current value, between 1.7 and 2.4 times the C number.If the current is higher than 2.4 times the C number, the user must consult the time-current curves for that particular fuse.“A” DesignationFuses that do not comply with “E,” “R” or “C” designations.Expulsion fuses can also be E-rated, K-rated and T-rated, and are also covered in the ANSI standards. The K and T ratings refer, respectively, to relatively “fast” and “slow” melting expulsion fuses. Detailed time-current tables adequately define these ratings.Selection GuideRatingsFeeder Circuit Section-alizing Fused Switches Power Trans-formersSubstationService Trans-formers DIP Pole Underground DistributionTransformersPole-MountedTrans-formers Pad-Mounted Distribution Transformers Motor Starters Potential Trans-formers Sub-stationCapacitorBanksType Class UseBrand kV,Ampere,kACurrent limitingGeneral purposePower BHLE/CLE/HLE/HCL 2.4–15.5 kV 10E–1350A to 85 kA ■■■■■Dist.CX/CXN 4.3–15.5 kV 3.5C–300C 50 kA ■■CLT2.4–15.5 kV 4A–150A 25 kA ■Backup Power CLPT2.4–38 kV 0.25E–10E to 80 kA ■Power BCLS/CLS2.4–8.3 kV 2R–36R 50 kA ■ExpulsionBoric acidPower RBA4.8–34.5 kV 0.5E–720E ■■■■RDB 4.8–34.5 kV 0.5E–720E ■■■■■■DBU14.4–38 kV 5E–200E 15SE–200SE 3K–200K■■■■■■1818Medium Voltage FusesCurrent-Limiting FusesCurrent-Limiting FusesCLE and HLE Current-Limiting—E-RatedCLPT Current-Limiting E-Rated forPotential Transformer ProtectionCLS Current-Limiting for Motor StarterCX Current-Limiting—Interchangeablewith McGraw Edison’s NX TypeCLT Current-Limitingfor Transformer ProtectionProduct DescriptionCurrent-limiting fuses areconstructed with pure silverfuse elements, a high-puritysilica sand filler, a speciallydesigned core and a glassresin outer casing.A high fault current melts thesilver element almost instantlyand loses energy to thesurrounding sand. The sandmelts and forms fulgurite,a glass-like substance.The arc voltage rapidlyincreases to nearly threetimes the fuse voltage ratingand forces the current tozero. Low fault current meltsa solder drop on the silverfuse element that, in turn,melts the silver.The element burns back untilthere is a sufficient internalgap to interrupt the current.This is known as the M-effect.Eaton current-limiting fusesare offered in two basictypes: backup and generalpurpose. Backup fuseshave a published minimuminterrupting current andrequire a series device forbreaking the circuit forcurrents below this minimumlevel. General purpose fuseshave improved low currentinterruption capability and aredesigned to interrupt low faultcurrents that cause the fuse tomelt in one hour or less.General InformationApplicationsCurrent-limiting technologiescan be used to meet almostevery fuse application. Typicalapplications for utility,industrial, construction andOEM customers include:●Feeder circuitsectionalizing●Power transformers●Substation servicetransformers●Underground distributiontransformers●Pole-mountedtransformers●Pad-mounted distributiontransformers●Fused switches●DIP poles●Motor starters●Potential transformers●Substation capacitor banksAccessoriesA wide assortment ofmountings, live parts andend fittings are availableto facilitate power fuseinstallation.Mountings include a base,porcelain or glass polyesterinsulators and live parts. Theyhelp enable the fuse to besafely attached to the gear.Mountings can be eitherdisconnect or nondisconnect.Live Parts attach the fuseto the mountings and areconsidered part of themounting. All parts abovethe insulators are live parts.Live PartsEnd Fittings are metal partsthat attach to each end ofthe fuse at the ferrules.They are used only ondisconnect fuses or whenconverting a nondisconnectto a disconnect fuse.1818Medium Voltage FusesExpulsion FusesExpulsion FusesRBA—Refillable Boric AcidRDB—Refillable Dropout Boric AcidDBU—Dropout Boric Acid—Interchangeable with S&C’s SMU-20Product DescriptionEaton expulsion fuses use boric acid as theinterrupting medium. Under a fault condition, arc heat decomposes the boric acid, which produces gases and boric anhydride. The water vapor blast extinguishes the arc in a deionizing action and exits from the bottom of the fuse.Type RBA indoor expulsion fuses are fitted with a filter or condenser that moderates the discharge exhaust. The discharge filter limits the exhaust to a small and relatively inert amount of gas and lowers the noise level without affecting the fuse interrupting rating. Steam discharge, that can affect the interrupting, is fully restricted by the condenser.Each type RDB outdoor dropout fuse includes an ejector pin that is forced through the top of the fuse. The ejector pin releases a latch on the mounting and the fuseholder is kicked outward and swings into the dropout position, through 180° with a vertical mounting, or 90° with an underslug mounting.Refill units can be fieldinstalled into RBA and RDB expulsion fuses. Once the old unit has been removed, the separately purchased unit can be easily installed into the fuse holder.General InformationApplicationsExpulsion technologies can be used to meet a number of fuse applications. Typical applications for utility, industrial construction and OEM customers include:●Feeder circuit sectionalizing ●Fused switches ●Power transformers ●Substation service transformers ●DIP poles●Potential transformers●Substation capacitor banksAccessoriesThe following accessories are available for expulsion fuses:Mountings include a base, porcelain or glass polyester insulators and live parts. They help enable the fuse to be safely attached to the gear. Mountings can be either disconnect, nondisconnect or dropout. Fuses may be vertical or underhung.Live Parts attach the fuse to the mountings and are considered part of the mounting. All parts above the insulators are live parts.End Fittings must bemounted on DBU fuse units to enable them to be fitted into the mounting.Filters and Condensers are for indoor applications of RBA expulsion fuses. They confine the arc within the fuse and substantially reduce the noise and exhaust when the fuse interrupts.Mufflers are used with DBU fuses in indoor applications to virtually eliminate offensive noise and exhaust gases when the fuse interrupts.18Medium Voltage FusesCurrent-Limiting and Expulsion FusesProduct SelectionEasy to Use, Easy to Order! Eaton’s fuse catalog numbering system makesit easy to order the right fuse. The catalog numbers are easy to remember, unique to each fuse, andare broken down in three descriptive segments: fuse type, voltage rating and current rating.These catalog numberscan be entered directlyand easily:●No change in orderprocessing will occur if you use either a style numberor its correspondingcatalog number. Y ouwill get the same fuse●In the back of this orderingguide is a style numberto catalog number cross-reference chartCurrent-Limiting Fuse Examples●5CLE-30E5.5 max. kV, CLE fuse unit,30E amperes●15CXN-45C15.5 max. kV, CXN fuseunit, 45C amperes●5CLS-GDM-E5.5 max. kV, CLS fuseunit, glass polyesternondisconnect mounting ●CLE-DL-DCLE, disconnect liveparts, size D Catalog Numbering SystemCurrent-Limiting FusesCurrent-Limiting Fuse AccessoriesAmperes0.5–1350SizeABDClassERCXMaximum kV2 =(2.4, 2.5, 2.75)4 =(4.3, 4.8)5 =(5.08, 5.5)7=(7.2)8=(8.3)15 =(15.5)25 =(25.5)38 =(38.0)TypeCLEHLEBHLECLPTNCLPTCLSBCLSCLS70CLS75HCLSLCLSCXCXNCLTAHLEACLS15CLE–100E–(D)InsulatorG=Glass polyesterP=PorcelainH=High BILDiameter SizeA=1-5/8 inches (41.3 mm)0.5E–1.5E single barrelB=1-5/8 inches (41.3 mm)3E–10E single barrelC=2.00-inch (50.8 mm)single barrelD=3.00-inch (76.2 mm)single barrelE=3.00-inch (76.2 mm)double barrelF=4.00-inch (101.6 mm)double barrelG=5/8-inch (15.9 mm)ferrule (CX/CXN only)HardwareDM=Disconnect mountingNM=Nondisconnect mountingDL=Disconnect live partsNL=Nondisconnect live partsDF=Disconnect end fittingsTypeCLEHLECLPTNCLPTCLSHCLSLCLSCXCXNCLTMaximum kV2 =(2.4, 2.5, 2.75)4 =(4.3, 4.8)5 =(5.08, 5.5)7=(7.2)8=(8.3)15 =(15.5)25 =(25.5)38 =(38.0)15CLE–P NM–(C)1818 Medium Voltage FusesCurrent-Limiting and Expulsion FusesProduct Selection Expulsion Fuse Examples●8RBA2-10E8.3 max. kV, RBA-200 refill,10E amperes●DBU17-30K17.1 max. kV, DBU fuseunit, 30 amperes●15RBA8-INH15.5 max. kV,RBA-800, indicatingnondisconnect holder●RBA4-FLTRRBA-400 filter Catalog Numbering SystemExpulsion Fuse UnitsExpulsion Fuse AccessoriesNote1Maximum kV occurs after DBU or before BA, DBA, RBA, RBT or RDB.DBU17–100EAmperes0.53567810121520253040506580100125140150175200250300400SpeedEKSETypeRBADBUDBARBTBAMaximum kV 181517252738487292121145InsulatorG=GlasspolyesterP=PorcelainHP=High LIWLporcelainBolt-InB=1-5/8 inches (41.3 mm),3E–10E, single barrelHardwareUM=Underhung mountingDL=Disconnect live partsNL=Nondisconnectlive partsDH=Disconnect holderNH=Nondisconnect holderNM=NondisconnectmountingUL=Underhung live partsVL=Vertical live partsI=IndicatingFLTR=FilterCOND=CondenserMFLR=MufflerSHNT=Shunt and springassemblyTypeRBADBURDBBAMaximum kV 18151725273815RBA2–P NM–(B)181818Medium Voltage FusesCurrent-Limiting and Expulsion FusesFurther InformationPricing InformationPrice and Availability Digest (PAD)Vista/VISTALINE™ Discount Symbols Y1-F, Y1-FE, Y1-FHPublication NumberDescriptionCurrent-Limiting Fuses CA08100016EFuse Catalog, Volume 14, Tab 3Expulsion Fuses CA08100016EFuse Catalog, Volume 14, Tab 2General Information CA08100016EFuse Catalog, Volume 14。
熔断器使用说明书
户外交流高压跌落式熔断器 安装使用说明书步骤1：如图1所示配置一个合适的托架，此托架 图1 将熔断器安装到支架上可以使用合适的横担、立柱或墙上的支架。
步骤2：如图1所示将熔断器安装到支架上，用螺栓稍微固定，使熔断器能绕螺栓轴转动。
注意在支架与安装柄之间有防步骤3：转动熔断器至最易于运行操作的位置并将它安全可靠地固定。
步骤4使紧固。
步骤1：将熔丝链头部的圆头螺钉拧紧，小心将熔丝链拉直。
步骤2：拧开熔管头部的金属帽，将熔丝链的底部 图2a 将弹簧板压到极限从熔管的上部进去，到下部穿出来。
步骤3: 紧。
松开耳轴上熔丝链夹紧螺母，见图2a 步骤4：将弹簧板压到极限力）见图2a 丝母上，见图2b ，将熔丝链拉紧，但不要太紧 图2b 将熔丝链绕螺母拉紧步骤5：剪断夹紧螺母外的熔丝链使露出的熔丝链长度约为10mm 。
熔丝链的安装（有加长连接杆的熔断器）有加长连接杆的熔丝链需要拆除熔丝链头部的可卸式圆头螺钉。
步骤1：拧掉熔丝链头部的圆头螺钉（有的熔丝链还有垫圈）。
步骤2：旋松熔管上部的金属帽，将加长连接杆从熔管中拿出。
步骤3：将熔丝链与加长连接杆连接起来并拧紧，拉直熔丝链，把熔丝链的尾部从熔管上部伸进，从下部拉出。
下面同上节步骤3~5。
安装并合上熔管只有专业人员才可以使用、检查和维修熔断器。
操作人员必须穿戴必要的与安全要求相一致的防护用品，如橡胶手套，安全帽、墨镜等。
图3 关合熔管步骤1：在如前所述安装好熔丝链后，轴的锁眼或将钩棒的尖头插进耳轴孔。
步骤2：如图3并将钩棒小心脱离。
步骤3：将钩棒的尖头插入熔管的拉环中，大约45度，然后朝着熔管端部方向猛力一推，打开熔管在没有使用负荷开断操作杆的情况下，不得打开运行中的熔管，因为这样会引起闪用负荷开断操作杆打开熔管后，可用钩棒将熔管提起脱离底座下部挂钩，见图3。
2010年3月8日上海固缘电力科技有限公司。
高压并联电容器外保护用熔断器使用说明书
熔丝的选配与更换
5
5 熔丝的选配与更换
5.1 熔丝的额定电流的选配
熔丝的额定电流应不低于被保护的并联电容器的额定电流的 1.43 倍，一般推荐在 1.43~1.55 倍的范围内选取。熔丝的选配可参照表 1。
5.2 熔丝更换
5.2.1 更换的熔丝必须符合 5.1 的规定要求。 5.2.2 更换熔丝前，电容器装置必须处于检修状态，且电容器经逐台短接放电后，方可 拆、卸熔断器与更换熔丝。 5.2.3 更换熔丝前应先检查熔断器动作原因是属于电容器内部故障正确动作，抑或自身 误动。切忌未查明原因，或者未更换故障电容器即行更换熔丝重新合闸。 5.2.4 更换熔丝前，须检查管体是否完好，熔管内外是否干净（可加适当清刷），如管 体已损坏则需同时更换。其它部件如有异常亦需更换。 5.2.5 更换熔丝后，重新按上述要求安装熔断器。
根据现行国标 GB50227《并联电容器装置设计规范》和电力行标 DL442《高压 并联电容器单台保护用熔断器订货技术条件》的规定要求，熔断器熔丝的额定电流按 1.43~1.55 倍电容器额定电流配置，熔断器在通过该电流时应不熔断，而在电容器内部 有 50%~75%串联元件段击穿短路时适时熔断。如电容器内部元件发生贯串性短路，熔 断器能在电容器外壳爆裂前开断，切除电容器组中故障电容器，避免事故扩大。
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安装要求
4
4 安装要求
4.1 安 装 前 应 按 设 计 要 求 核 对 熔 断 器 的 型 号 和 熔 丝 的 额 定 电 流 正 确 无 误 ， 并 按 DL442—91 中第 4.1.3 条款的要求进行交接验收试验（包括外观及外部尺寸检查、 测 量 电 阻 值 ， 其 他 项 目 及 试 品 数 量 由 用 户 与 制 造 厂 商 定 ）。 4.2 熔断器的安装应按照附录 A 的安装示意图进行，熔管与水平夹角以 30º为宜。尾线 应拉紧，且不宜过长（尺寸参照附录 A）。 4.3 熔管口的气流喷射方向不得有任何障碍物，以防止熔断器动作时喷出气流，以及尾 线与电容器外壳或安装支架碰触使故障扩大。
西熔户内熔断器技术说明
以下资料来自西安西电集团高压电瓷电器厂/全范围保护用高压限流熔断器本产品适用于户内交流50Hz，额定电压12kV的系统，作为变压器及其它电力设备过载或短路等保护元件，全范围保护用高压熔断器是一种新型的限流熔断器，它能够可靠的开断引起熔体熔化的电流至额定开断电流之间的任保故障电流，它是利用限流式熔断件具有较高分断能力，而非限流式熔断件却具有较好的小电流保护特点，结合两种熔断件的不同特点，组合为一体，获得全范围开断的良好保护特性。
◆型号：(1)国标型号(2)英国型号◆基本参数：熔断器的基本参数◆主要技术数据：1、熔断器在规定的使用条件下能可靠的分断使熔体熔化电流至额定开断电流为50kA之间的任何故障电流。
2、时间—电流特性曲线如图1。
3、限流特性如图2。
4、t特性如表：弧前t最小值(S)弧前t最大值(S)2.2× 4.7×3.4× 6.1×7.7× 1.1×1.3× 1.5×2.5× 2.5×3.8× 3.8×5.1× 5.4×6.8× 5.6×◆外型及安装尺寸：◇外型及安装尺寸图◆选用导则：用于保护12kV变压器的熔断件一般选用导则如表：变压器保护用高压限流熔断器——符合德国DIN标准外型尺寸的熔断器本产品适用于户内交流50Hz，额定电压12kV系统，并可与其它保护电器（如：负荷开关，真空接触器）配合使用，作为电力变压器及其它电力设备过载或短路等保护元件。
◆型号：(1)国标型号(2)英国型号◆基本参数：熔断器的基本参数注：(1) *号由是否安装撞击器确定(2) ()为英国型号◆主要技术数据：1、熔断器在规定的使用条件下，能可靠的分断最小开断电流为(2.5-3)倍熔断件额定电流Ie至额定开断电流为50kV之间的任何故障电流。
2、时间—电流特性曲线如图1，最小开断电流以上部分用虚线表示。
高压熔断器
22.高压电容器断电后自身仍带有电荷，若需再次合闸，应在其断电（）后进行。
A. 1分钟B. 3分钟C. 5分钟
44.更换RN2型熔断器熔丝时，熔丝的材料、截面、长度和电阻均应符合要求，否则会在熔断时（）。
A.产生危险的过电压B.造成指示熔体不能熔断C.可靠喷射灭弧
4.介质老化，tgδ不断增大。
1.改善通风条件，增大电容器间隙。
2.加装串联电抗器。
3.采取措施，限制操作过电压及涌流。
4.停止使用及时更换。
爆炸着火
内部发生极间或机壳间击穿而又无适当保护时，与之并联的电容器组对它放电，因能量大爆炸着火
1.立即断开电源。
2.用沙子或干式灭火器灭火。
单台熔丝
熔 断
1.过电流。
（七）触点严重过热或熔化
（2）电容器故障产生的原因及处理方法：
故障现象
产生原因
处理方法
外壳鼓肚
变 形
1.介质内产生局部放电，使介质分解而析出气体。
2.部分元件击穿或极对外壳击穿，使介质析出气体。
立即将其退出运行
渗漏油
1.搬运时提拿瓷套，使法兰焊接出裂缝。
2.接线时拧螺丝过紧，瓷套焊接出损伤。
3.产品制造缺陷。
（4）遇有下列情况时，应退出电容器：
（一）电容器发生爆炸；
（二）接头严重发热或电容器外壳示温蜡片熔化；
（三）电容器套管发生破裂并有闪络放电；
（四）电容器严重喷油或起火；
（五）电容器外壳明显膨胀，有油质流出或三相电流不平衡超过5%以上，以及电容器或电抗器内部有异常声响；
（六）当电容器外壳温度超过55℃，或室温超过40℃时，采取降温措施无效时；
《RN4-20高压熔断器技术规范》
《RN4-20 高压限流熔断器技术规范》学校：广西科技师范学院学院：机械与电气工程学院班级：电气自动化***班姓名：甘**学号：1629*****任课教师：陈**目录《RN4-20 高压限流熔断器技术规范》 (1)一、概述 (3)二、技术参数 (3)三、操作以及用途 (4)1、检验操作项目及要求 (4)2、高压限流熔断器使用条件 (5)3、发电厂电气运行中的用途 (5)四、企业生产信息以及达到的技术要求 (6)一、概述高压熔断器的型号字母含义：Ｒ：表示熔，代表熔断器；Ｗ：表示户外，代表意义是熔断器为户外安装；Ｎ：表示户内，代表意义是熔断器为户内安装。
字母后面的数字：代表设计序号；“—”线后面的数字：代表熔断器的额定电压。
例如，RN4-20高压熔断器就是额定电压2KV户内高压限流熔断器，用于电压互感器的短路保护，其断流容量为10002MVA。
在短路时以限制线路电流到最小值的方式进行瞬时开断，1分钟内熔断电流应在0.6~1.8A范围内。
二、技术参数三、操作以及用途1、检验操作项目及要求检验前应填写好“高压熔断器检验记录”中的合同号、产品名称、产品型号、出厂编号，必要时需该项目车间负责人在旁。
1)外观检查A.开箱检查B.检验包装箱应完好无损无损坏，丢失，变形现象；C.包装箱内应附有产品合格证，装箱单和安全使用数明书；D.包装箱内物品的名称，数量，型号应与包装箱一致；E.是否有按用户要求提供的熔管，触头，熔丝等备品，随同产品发运。
2)外壳检查A.检查产品表面磨砂均匀，无污点、无裂纹、无变形；B.检查产品铭牌是否完好；C.检查产品铭牌上的制造厂铭牌及厂称，产品型号名称，额定电压（kV），额定电流（A）,额定短路开断电流（kA），额定合分负荷电流（A）（仅对负荷熔断器），制造日期及出厂编号是否符合合同要求.D.检查熔断器接触弹簧弹性是否良好。
E.熔管转动轴制造是否灵活，熔管角度是否达到规程要求，尤其是配备的熔管尺寸多数达不到规程要求，熔管过长将鸭嘴顶死，造成熔体熔断后熔管不能迅速跌落，及时将电弧切断、熄灭，造成熔管烧毁或爆炸；熔管尺寸短，合闸困难，触头接触不良，产生电火花。
3.6-40.5kv高压限流熔断器
3.6-40.5kv高压限流熔断器
本产品适用于户内交流50Hz，额定
电压3.6-40.5ｋV系统作为电压互感器的
过载或短路保护之用，（通过国家高压电器
质量监督检测中心试验，产品符合
GB/T15166.2和IEC60282-1）。
1.型号
2.基本参数
熔断器的基本参数如表
3.主要技术数据
（1）熔断器在规定的使用条件下，能可靠的分断使熔体熔化的电流至额定开断电流50ｋA之间的仍何故障电流。
（3）时间--电流特性曲线如(图1)所示，最小开断电流以上部分为虚线。
（4）限流特性如（图2）。
4.外型及安装尺寸
熔断器的外型及安装尺寸如(图3)和表2所示
表2
订购该产品
RN系列高压交流熔断器
本系列高压交流熔断器适用于户内交流50Hz，额定电压3kV-35kV
电力系统，用于对电力线路、变压器、电压互感器及其它电器的过载及短
路保护，亦可用以保护电力系统分出的支路，当线路短路电流达到最大值
之前熔断器就将线路切断。
1.型号
2.基本参数
熔断器的基本参数如表
表一
-6
-10
-3
-6
-10
注：*号为双拼管
表二
-35
-35
-35
注：*号为双拼管
3.外型及安装尺寸
、型户内高压熔断器外形尺寸如(图1)、(图２)和表3所示
表三
、-10/2
、-10/75*
、-35/2
( )为RN,-6外形尺寸
型户内高压熔断器外形尺寸如(图3)、(图4)及表4
表四
-10
-35
订购该产品。
高压熔断器产品参考手册说明书
Product featuresUL® Recognized, Guide JDYX2, File E19180Fuse holder•UL Recognized, Guide IZLT2, File E14853 HLR-2A andG MW (fuse) HWA (fuse holder)Specialty fuse fast-acting and fuse holder•Can be soldered direct into circuit or can be mounted in HWA holder which can be soldered into circuit.•Transparent window in fuse for visual determination of open fuse element•Fuseholder body and knob material is diallyl phthalate •Holder includes “O”-ring, gasket, and nut•Type HWA-AF holder includes waterproof cap (knob) AF •Sub-miniature pin-base fuses for limited space applicationsCatalog symbol: GMW (fuse) H WA (fuse holder) Ampere Rating: 1/100 - 5 AVoltage Rating: 125 Volts AC or less Interrupting Rating: 35 A Agency informationFuseLoad Opening time 100% 4 hrs. (min.)200%10 sec. (max.)Catalog numbers125 V olts GMW-1/100GMW-1/4GMW-1-1/2GMW-1/64GMW-3/10GMW-2GMW-1/32GMW-4/10GMW-3GMW-1/16GMW-1/2GMW-4GMW-1/10GMW-6/10GMW-5GMW-1/8GMW-3/4—GMW-2/10GMW-1—Carton quantityAmp ratings Carton qty.GMW 1/100–5100HWAfuse holder 100AF knob100•Sub-miniature pin-base fuses for limited space applicationsElectrical characteristicsEatonElectronics Division 1000 Eaton Boulevard Cleveland, OH 44122United States/electronics © 2017 EatonAll Rights Reserved Printed in USAPublication No. 2058 BU-SB98107 August 2017Eaton is a registered trademark.All other trademarks are property of their respective owners.Life Support Policy: Eaton does not authorize the use of any of its products for use in life support devices or systems without the express written approval of an officer of the Company. Life support systems are devices which support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user.Eaton reserves the right, without notice, to change design or construction of any products and to discontinue or limit distribution of any products. Eaton also reserves the right to change or update, without notice, any technical information contained in this bulletin.GMW (fuse) HWA (fuse holder)Specialty fuse fast-acting and fuse holderTechnical Data 2058Effective August 2017Dimensions - in (mm):0.379"Mounting hole ±0.002"(0.5mm)Time-current curves – average meltCurrent in amps0.0050.010.1/4/21/41030。
Littelfuse NANO2 SMF熔断器说明书
DescriptionThe Nano 2® SMF Fuse is a very small, Wire-in-Air (WIA) square shape surface mount fuse that was designed for secondary side circuit over-current protection applications. These fuses are designed for PCB using surface mount technology.Agency ApprovalsElectrical Characteristics for SeriesFeatures• Very fast-acting • Small size• Wide range of current rating available (0.062A to 20A)• Wide operating temperature range • RoHS compliant and Halogen Free • UL Listed andRecognized to UL/CSA/NMX UL 248-1 and UL/CSA/NMX UL 248-14 (see Agency Approvals)• Conforms to DENAN’s Appendix 3• Conforms to EN 60127-1 and EN 60127-7Applications • Notebook PC • LCD/PDP TV • LCD monitor • LCD/PDP panel • LCD backlight inverter • Portable DVD player• Power supply • Networking • PC server• Cooling fan system• Storage system • Telecom system • Wireless basestation • White goods • Game console • Office Automation equipment • Battery charging circuit protection • Industrial equipmentNotes:- l2t calculated at 8ms.- Resistance is measured at 10% of rated current, 25ºCSoldering ParametersDimensionsPackagingPart Numbering System(.077")(.106")Recommended pad layout0451 001. M R LSeriesAmp CodeQuantity code Packaging code Refer to Electrical characteristics tableM = 1000 pcs N = 5000 pcs R = Tape and ReelL-RoHS Compliant & Halogen Free (Gold Plated Caps)451 = Gold / Sn-dipped Silver Plated Caps 453 = Silver Plated Caps NOTE: “L” suffix applies to 451 series only- 453 series is available only as RoHS compliant version and does not require “L” suffix. Please do not include “L” suffix within 453 series ordering instructions.SN-RoHS Compliant & Halogen Free (Sn-dipped Caps)Disclaimer Notice - Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at .。