Mechanical Interlocks

Functions and Methods of Operation of Mechanical Interlocks

Interlocks	Function of interlock	Method of operation
Between truck and LV plug interlock	The EvoPacT HVX-O VCB cannot be racked-in until the LV connector is plugged.	The rotary movement of the EvoPacT HVX-O VCB crank is blocked after one rotation. Do not apply force.
Between truck and LV plug interlock	LV plug cannot be removed when the EvoPacT HVX-O VCB is in the service condition.	The low voltage plug is locked.
Between truck and earthing switch	The truck cannot be racked-in if the earthing switch is ON.	The movement of the truck is blocked. Do not apply force.
Between truck and earthing switch	The earthing switch can no longer be switched ON if the truck has left its disconnected position.	The insertion of the earthing switch lever is blocked.
Between the EvoPacT HVX-O and the truck	EvoPacT HVX-O cannot be racked-in or racked-out while it is switched ON.	The rotary movement of the truck crank is blocked after one rotation. Do not apply force.
Between the EvoPacT HVX-O and the truck	EvoPacT HVX-O cannot be switched ON or switched OFF unless the truck is completely in its disconnected/service condition.	The EvoPacT HVX-O cannot be switched ON or OFF.
Between the truck and the cubicle	If the truck frame is not locked in the panel, the truck cannot be actuated.	The handle cannot be inserted to the truck if both truck handles in the front frame are not moved outwards. Rotation of the crank is not possible if both truck handles in the front frame are not moved outwards.
Between the truck and the cubicle	If the truck has left its disconnected position, the truck front frame cannot be unlocked in the panel.	Both truck handles in the front frame are locked.
Between the truck and the front door (optional).	The front door can only be opened if the truck is in its disconnected position.	Door is latched with the truck, however, handle can be operated.
Between the truck and the front door (optional).	If the front door is opened, the truck cannot be moved into service position. This interlock is standard.	The crank cannot be inserted to the truck if the front door is opened.
For the truck in disconnected position (optional castle lock).	CB can be moved to service position only when the key is inserted in the lock. Key is blocked in the lock when CB is in service position.	LV plug insertion is blocked by the lock and is possible only when key is inserted. Key cannot be taken out unless LV plug is disconnected. LV plug cannot be disconnected when CB is in service position.