Handcart push

Handcart push-pull should be light, no jam, collision phenomenon. The same type of handcart should be able to swap.(3) the handcart pushed into the work place, at the bottom of the dynamic contact on and static contact clearance should comply with the requirements.(4) the handcart and secondary loop connection between cabinet put oneself in another's plug-in should be in good contact.(5) safety isolation plate should be open and flexible, and corresponding action of pass in and out of cars.(6) the handcart and grounding contact between cabinet put oneself in another's position should be close contact. When the handcart pushed into the enclosure, the earthing contact shall be than the main contact us contact, pull when disconnected after grounding contact than the main contact.1 P081(6) distribution on the installation of electrical appliances1. Power distribution ark electrical installation requirements(1) electrical components quality is good, should comply with the design requirements, specifications, appearance should be in good condition, and accessories, all neatly, fixed firmly, good seal.(2) the electrical appliances should be able to separate disassembling replacement without affecting other appliances and conductor of fixed beam.(3) heating elements should be in a good heat dissipation, the connection between the two heating elements should be used in heat conductors. The set values for the fuse melts specification, circuit breaker shall meet the design requirements.(4) signal circuits of signal lamp, light plate, electric bell, accidents such as clock should display accurate and reliable.(5) device contained in the equipment or other grounding requirements for electrical appliances, the shell should be reliable grounding.(6) should switch connector contact is good, should have enough safe distance between adjacent connector, switch should not be touched and adjacent connection piece. Electricswitch to end link, should make the fragments of the connection is open, end is electrically neutral.2. The terminal line of installation requirements(1) terminal row should be no damage, fixed firmly, good insulation. Terminal serial number, and convenient wiring terminal row should be convenient to replace. Terminals should be matching with wire section.(2) the circuit voltage exceeds 400 v, the insulation of the terminal row should be enough. Strong, weak current terminal should be separated.(3) and often charged between positive and negative power is the power and switching or trip circuit between, should have an empty terminal.(4) the front of the ark, and the electrical appliances, such as terminal row should be marked on the back number, name, location, purpose and operation. Damp environment should be moistureproof terminals.3. The secondary loop of clearance and creepage distance(1) between the two conductors, contained in the conductive body and bare clearance and creepage distance between electrically neutral conductor should comply with the requirements.(2) the ark small bus in different phase or bare between current carrying parts of different polar, bare between current carrying parts and without the insulation of the metal body, the clearance shall not be less than 12 mm, creepage distance shall not be less than 20 mm. 4. The requirements of transformerCurrent transformer secondary coil must be reliable grounding, and identifies clear; Current transformer of the installation location is convenient for maintenance, debugging and maintenance; Transformer technology data conform to the requirements of the design drawings;5. The secondary circuit wiring requirements(1) the wires should be contained in the connector, wire conductor should have no damage.(2) the cable core and the end of wire shall clearly indicate its loop number, write clearly is not easy to fade.(3) the wiring to be tidy and beautiful, bundle the wire slot used nylon spiral tube bundle or line.(4) on the terminal plug type, different section of the two wire shall not meet in the same terminal.(5) of the secondary loop grounding should establish special bolt.(6) used to connect to the door of the electrical equipment, control bedplate and other moving parts of the wire should be used more than soft wire, laying length shall have the right margin. And clamp fixed on both ends of movable parts of the application.Third, complete sets of power distribution unit test and adjustment requirements(a) complete sets of power distribution unit test and adjustment requirements1. The high pressure test should test unit for licensed by the local power supply department. Test standards in line with national norms, the provisions of the local power supply department and product technical requirements.2. On the bus, lightning arrester, hv porcelain, voltage transformer, current transformer, high voltage switch equipment and components for the experiment of the following contents: insulation test, main circuit resistance measurement and the temperature rise test, current peak resistance current, short tolerance test, close, shutoff ability test, mechanical test, protection grade examination, operation vibration test, the internal fault test, sulfur hexafluoride gas insulated switchgear leak rate and moisture content.2 P0823. The overvoltage relays, time relays, signal relay adjustment, such as mechanical chain adjustment.4. Use 500 v megohmmeter test the insulation resistance of the secondary loop must be greater than 0.5 ohms. Secondary loop, such as electronic components, check the site is allowed to adopt megger test, whether should use multimeter test loop through.5. Simulation test, control, chain operation, signal and relay protection operation should be correct, sensitive and reliable.(2) 10 kv high voltage (its) test requirements1. The power frequency withstand voltage test: in a circuit power frequency withstandvoltage test, lightning arrester should be handcart, handcart used transformer, voltage transformer pull handcart, not to participate in the test.The power frequency withstand voltage test device it is power station, power supply and distribution system and the basic testing equipment, scientific research units, such as the overwhelming majority of users for a variety of electrical products, electrical components, insulation materials, etc., the dielectric strength test under specified voltage, assessment of the insulation of the product level, try insulation defect is found, the measure of the ability of overvoltage. 】2. Action experiment: put circuit breaker handcart in test position and work location for electric switching operation, should be able to smooth points.3. The chain test: handcart in working position and test, the circuit breaker can switch. Handcart moves between the test position and work location, because the chain effect, ensure break-brake state of circuit breaker. When the circuit breaker closing, chain should be locked, handcart can't push and pull.4. Other test: installed in the enclosure of electrical components and auxiliary circuit, bus, grounding and relay protection test items and requirements can be conducted according to the relevant provisions of the electrical device commissioning test.(3) the setting of protective devices1. The leakage protection setting: by setting the switch.2. The overload protection setting: through the overload setting multiple switches.3. The short circuit protection setting: through multiple switch short-circuit protection setting.Fourth, complete sets of power distribution equipment electric transmission operation acceptance(a) the preparing work before sending1. Prepare qualified the electroscope, insulating boots, insulating gloves, temporary grounding braided copper wire, insulation pads, powder fire extinguisher, etc.2. Thoroughly clean all equipment and the dust in the transformer room, control room. Vacuum cleaning electric instrument components.3. Check the bus and devices have apparent tools, metal materials, and other objects.4. Establish a commissioning organization and trial operation commanders, the operator and guardian.5. The installation operation is complete, the quality department to check all qualified.6. All qualified test project, and the test report.(2) check before sending1. Check the switchgear electrical equipment and wiring conformed to the drawings requirements, whether the terminal marked number, wiring is neat.Contact 2. Check the installed electrical equipment are in good condition, whether to conform to the technical conditions in itself.3. Check the reliability of the mechanical linkage.4. Check whether actions of withdrawable component are flexible.5. Check the grounding device switch cabinet and firm, with and without obvious mark.6. Check whether the installation of the switchgear conforms to the requirements.。