Operator safety while working on Vacuum Circuit Breaker
MECHANICAL INTERLOCKS
Anti-pumping main contacts device
lf the vacuum circuit-breaker is tripped is not possible accidental closing of the main contact.
Mechanical interlock rotary air isolator and earthing switch
Prevents the closing of the earthing-switch if the air isolator is not "open" and the closing of the air isolator if the earthing switch is not "open
Mechanical interlock between vacuum circuit-breaker and air rotary isolator
0pen (OFF) the vacuum circuit breaker when you insert the operating handle inside the air rotary isolator operation sea
Mechanical interlock Panel door
Prevents the opening of panel door and access to the cable compartment, if the earthing switch is not closed and prevents the opening of the earthing switch with cable compartment panel door open
Mechanical block - operating handle
During the isolation and earthing operation it is not possible to extract the operating handle before completing entirely movements required to open \ close the air isolator or the earthing switch
Mechanical block - auxiliary circuit connector (Optional)
0pens the main circuit (0FR if the auxiliary connector plug is removed from the socket. Prevent also the closing [0N) of vacuum circuit-breaker until the plug is not fitted into the socket
KEY L0CKS (0ptional)
Key lock on air rotary isolator (rotation block)
Prevent the possibility to insert the operating handle in the air rotary isolator operation seat blocking the rotation (both in open 0r close direction) and avoiding the accidental opening 0FF (by inserting the operating handle) of the vacuum circuit breaker if closed 0N.
Key lock on air rotary isolator in open isolated position
Prevents the closing of the air rotary isolator without the presence of key.
Key lock air rotary isolator/earthing switch
Prevents the closing of the earthing switch without the key released from the key lock in open position of the air rotary isolator. Prevents the closing of the air rotary isolator without the key released from the key lock in open position of the earthing-switch.
Key lock earthing switch - key free in open
Prevents the closing of the earthing without the presence of the key
Key lock earthing switch - key free in closed
Prevents the opening of the earthing without the presence of the key.
Key lock on the opening Pushbutton
Lock the vacuum circuit-breaker in open position (OFF)
PADL0CK FACILITIES (0ptional)
Prevent operator access to the controls that allow the following functions: 0pening pushbutton, closing pushbutton, manual charging of closing spring, operations on air rotary isolator, operations of the earthing switch.
Prevent operator access to the controls that allow the following functions:
0pening pushbutton, closing pushbutton, manual charging of closing spring, operations on air rotary isolator, operations of the earthing switch.