VCB auxiliary parts Chasis Truck for Withdrawable type vacuum circuit breaker switchgear

Circuit Breaker Handcart has perfect and reliable interlock function. When it combines with mid-located unit and coordinate with EK6 switch, it can meet the requirements of Five-Pretecting Interlocker in GB 3906 standard, the detail effect of handcart interlock as follow:

1. Used to mount circuit breaker, transformer and other components in the withdrawable switchgear, as auxiliary operation of components with busbar. When operation with internal mechanism of circuit breaker and other interlock mechanism of mid-placed cabinet, it can satisfy  the interlock requirement of "5 preventions" stipulated in GB3906.

2. Only when the handcart is under testing/isolating or working position, the circuit breaker can make. After that,  the handcart is under locked state, which avoids false connecting or making of the spacing contact.

3. When the handcart is under working position or away from testing/isolating position for 10mm, the earthing switch fails to make,avoided powered false making of the switch.

4. When the earthing switch makes, the handcart shall not shift from testing/isolating to working position, avoiding the switch closing the circuit breaker in making.

5. When the chassis enters cabinet, once away from testing/isolating position, the handcart fails to draw out from the cabinet.

Features

1.In closing state, when handcart in working or isolated position, and with handle operating, the handcart won¡¯t move, so that to prevent to pull handcart on- load.

2 .When handcart in working position, EK6 earthing switch can¡¯t close, to avoid closing earthing switch.

3 .When handcart back to isolated state, after EK6 closing, the handcart can¡¯t be moved to working position to prevent closing with earthing wire.

4.Once handcart is away from isolated position, when push the handcart with handle to working position, during the way, can¡¯t carry on closing operation.While after reached to working position, closing operation can be made.

5.There are 2 auxiliary switches (code S8,S9) installed on handcart, contact¡¯s rated current is 15A . S8 gets 5 pairs NC contact,to make signal of isolated position.When handcart is in isolated position, auxiliary switch S8 is in closing state, while in working position,S8 is in open state. S9 gets 5 pairs NO contact to make signal of working position.When handcart is in isolated position,S9 is in open state,while in working position,S9 is close state.

6.After handcart getting into cabinet, as long as handcart is not in isolated position, it can¡¯t draw out from the cabinet.

Yueqing Liyond Electric Co., Ltd.

Experience Member 0 Chinese Supplier

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