First, open the circuit breaker, disconnect and pull out all the circuit breakers of the incoming cabinet, the circuit breaker is completely isolated from the live line, and then open the middle and lower doors to enter the circuit breaker room to repair the circuit breaker.
10kv High Voltage Equipment For Hydropower Plant
It is a complete power distribution device for 3~12kV three-phase AC 50HZ single bus and single bus section system. Mainly used in power plants, small and medium-sized generators for power transmission, industrial and mining enterprises, power distribution and secondary substations of electrical systems, power reception, power transmission, and large-scale high-voltage motor starting, etc.
1. The closing procedure is as follows:
a. Close the middle and lower doors, and lock them with electromagnetic locks.
b. When the circuit breaker is closed, the command plate on the analog board should be exchanged with the command plate on the control switch handle before operating the control switch to close.
2. The opening procedure is as follows:
a. After swapping the instruction board on the analog board with the instruction board on the control switch handle, operate the control switch to disconnect the circuit breaker.
b. The electromagnetic lock is unlocked after the circuit breaker is opened.
3. When the main bus or overhead incoming line is live, the circuit breaker can be overhauled without power failure.
First, open the circuit breaker, disconnect and pull out all the circuit breakers of the incoming cabinet, the circuit breaker is completely isolated from the live line, and then open the middle and lower doors to enter the circuit breaker room to repair the circuit breaker. (Do not open this door when the indicator light of the high-voltage charged display device on the lower door is on)
4. The main circuit is not powered off, and the auxiliary circuit is overhauled.
The relay room and terminal room of the switch cabinet are structurally completely isolated from the main circuit, so the auxiliary circuit can be inspected and repaired without power failure in the main circuit.
5. Emergency unlock
When the main circuit is in operation and the operation is affected by the failure of the electrical interlock, it needs to be unlocked in an emergency, as long as the emergency unlocking key is used to unlock it, and the middle and lower doors can be opened freely. After the accident is eliminated, it should be restored to its original state immediately. Daily maintenance should be maintained after it is put into operation, and the heating of the bus should be observed regularly. If the temperature rise is too high or there is abnormal sound, the cause should be investigated. Depending on the operating environment, cleaning and maintenance work will be carried out every 2 to 5 years.
When the main circuit is in operation and the operation is affected by the failure of the electrical interlock, it needs to be unlocked in an emergency, as long as the emergency unlocking key is used to unlock it,
