Indoor Handcart Vacuum Circuit Breaker

In the market economy competition of reform and opening up, SanGao dared to compare the quality, price, and service with the manufacturer of Indoor Handcart Vacuum Circuit Breaker. We know that the value creation of a company is closely related to its development strategy and planned budget. In the process of self-development, our company continuously improves and enriches the connotation and content of corporate culture construction, becoming a conscious action and goal for employees.

What is a handcart circuit breaker?

Indoor Handcart Indoor Vacuum Circuit Breaker means that the circuit breaker is installed on a withdrawable handcart. Due to the good interchangeability of the handcart cabinet, it can greatly improve the reliability of power supply If this is broken, you can replace it with a spare handcart.

Generally, the Indoor Handcart Indoor Vacuum Circuit Breaker has three working positions: 

1. Running position: 

2. Testing position: 

3. Maintenance position

1. The maintenance position is to pull the circuit breaker out of the cabinet, which is clear. How to maintain it without pulling it out;

2. Test position: Pull the circuit breaker to the position where it can be operated, but the circuit breaker is disconnected from the primary system and is safely disconnected, that is, the position where the safety distance between the primary contacts can be ensured. The secondary plug is still plugged into the socket. As long as the operating power is turned on, the secondary circuit and circuit breaker can be tested for normal operation;

3. Working position (hot standby), all components of the switchgear are in working condition, only the circuit breaker is not closed; This state is called hot standby. The line that needs to be closed immediately should be placed in hot standby, and the automatic closing should also be placed in hot standby. The motor switch that is operated by the on-site button to start should also be placed in hot standby (for on-site operators, this motor has already been powered on, but has not yet started).

4. Cold standby state: The circuit breaker is placed in the test position, and the secondary plug is not plugged in. This state is' this circuit is temporarily unused '.

Precautions during operation

When the grounding switch is in the closed position, the push rod in the grounding switch spindle interlocking mechanism is pushed into the handcart guide rail in the cabinet, so the circuit breaker handcart cannot be pushed into the cabinet.

When the handcart is closed at the working position of the cabinet, the locking electromagnet inside the chassis car is locked on the screw and will not be pulled to prevent the circuit breaker handcart from being pulled by mistake under load.

For the cable entry cabinet: busbar section cabinet and the transformer scheme used, due to the live side of the incoming cable, an electromagnetic lock is installed on the lower door to ensure that the cable room cannot be entered when the cable side is live.

By installing an anti misoperation type transfer switch (with red and green signs) on the panel, it is possible to prevent accidental opening and closing of the circuit breaker.

After the Indoor Handcart Indoor Vacuum Circuit Breaker is closed in the working position, the outgoing side is electrified. At this time, the grounding switch cannot be closed, and the push rod in the grounding switch spindle interlocking mechanism is stopped, and its operating handle cannot operate the grounding switch spindle.