Operation and maintenance of high voltage switchgear
Release time：
2022-05-18
The power distribution room must be moisture-proof and dustproof to prevent small animals from entering.
1) The power distribution room must be moisture-proof and dustproof to prevent small animals from entering.
2) All metal directions should be anti-rust (varnish or color paint), moving parts should be lubricated, check whether screws are loose, ash should be removed in time.
3) Observe the state of each component for overheating, discoloration, noise, poor contact and other phenomena.
4) For vacuum switch: pay attention to pingxiang High voltage complete set of power distribution cabinet factory
A, if possible, the power frequency resistor voltage can be applied and the vacuum degree indirectly controlled.
B. For the glass bubble fire extinguishing room, observe whether there are black hair and glow discharge on the internal metal surface.
C. When replacing the arc extinguishing chamber, the conductive rod shall be fixed and the bellows shall not bear torque. The conductive clip and rod must be clamped and connected.
D. The fuse size of the closing circuit should not be too large, and the fuse performance is reliable.
E, if the closing fails, check the fault: electrical aspects may be the power supply voltage is too low (voltage drop is too large or power capacity is insufficient), the closing coil is damp, resulting in short circuit in the middle, fuse is blown; As for the mechanism, the tension connection of the lock may be too small, the Angle adjustment of the auxiliary switch is not good, and the power supply is disconnected prematurely.
F. If the opening fails, the fault must be checked: the electrical aspects may be the power supply voltage is too low, the switch contact is poor, the opening circuit is disconnected; Mechanical aspects, it may be the impact adjustment of the brake coil is not correct, the iron core is stuck, the clamp connection is too large, and the screw is loose.
G. The contact time of the auxiliary switch should be carefully adjusted. A premature shift may not happen after all. Switching too slowly will electrify the rigid switching coil and burn out. The correct position is to turn off at low voltage and then turn off just right.
5) For disconnection:
A. When closing, pay attention to whether the blade and switch are twisted, whether the closing is in place, and whether the contact is good.
B. Whether the fracture distance at the opening is ≥150mm.
C. Whether the bracket and push rod porcelain bottles are cracked or whether rubber parts are loose.
D. Whether the connection device between control mechanism and switch is normal and reliable.
6) Used to insulate trucks
A, protective agent (conductive paste, vaseline, etc.) is suitable for the blocking surface of the plugging material;
B. Pay attention to whether the plug has obvious deflection and deformation.
C. During maintenance, pay attention to whether the mating surface of the connector has fusion welding.
7) For current transformers: Pingxiang High voltage complete set distribution cabinet Factory
A. Pay attention to whether the plug is overheated, whether there is noise and peculiar smell.
B. Whether the insulation part is cracked or discharged.
C, if the lead screw is loose, do not open the lead screw, in order to avoid induction high pressure, damage to the safety of operators and equipment.
8) When the coupling device has not been in operation for a long time, heat and dehumidify the primary component interval (such as trolley room and cable room) before use to prevent condensation from affecting the external insulation of the equipment.
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Yunduobao Electrical (Yunnan) Co., Ltd.
Yunnan Duobao Electrical Equipment Co., Ltd.
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