Undervoltage releases [t-head2]

These switch the circuit-breaker off when no voltage is present. They are used for safety tasks. The undervoltage release U-PKZ20, which is connected to voltage via the early-make auxiliary contacts VHI20-PKZ0 or VHI20-PKZ01, allows the circuit-breaker to be switched on. In the event of power failure, the undervoltage release switches the circuit-breaker off via the switch mechanism. Uncontrolled restarting of machines is thus reliably prevented. The safety circuits are proof against wire breaks.

The VHI-PKZ0 can be used together with the PKZM4!