Safety Maneuvers

KEY TRANSFER SYSTEMS

Pin locks

to block the operation in the open/closed position, key locked with pin extracted, normally installed on:

DisconnectorsSwitches Valves Levers

Pin locks to prevent the door from closing again, normally installed on:

Perimeter fencesSea laddersManholesHatches for silos, tanks etc.

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EXAMPLES OF APPLICATIONS

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Button

EXAMPLE: ABB SERIES SWITCH BLOCK

The function of the lock is to lock the system switch OFF and prevent it from restarting through a pawl activated by turning the key.

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Button

EXAMPLE: LOCKABLE THREE-WAY VALVE BLOCK

The valve is designed to be padlocked but for some needs in which the risk is particularly high and the complex procedure it is necessary to also intervene with a mechanical block which forces the operator to empty the system downstream of the valve before carrying out any maintenance activity.

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Button

EXAMPLE: RETURN ROD BLOCK

With the panel open, the pin blocks the rotation of the return rod connected to the external handle of the disconnector, the missing key can be used to open the door of a transformer room, in this way it will never be possible to restore voltage by manually turning the switch rod until the end of the maintenance intervention with the subsequent insertion of the key and unlocking of the pin.

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Button

EXAMPLE: Earthing switch lever lock

The use of two BKF11 type blocks allows the control lever to be moved only after inserting and rotating the key that activates the pin in the left lock and then blocking the operation by rotating and then extracting the key that activates the pin in the right lock .

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Button

EXAMPLE: Anti-accidental door closing lock

The pin is held inside the lock by the door frame on which it rests; when the door is opened the latch comes out to prevent it from closing again; the subsequent rotation and removal of the key ensures that the door cannot be closed again until the maintenance is completed.