Circuit Protection Devices

Low-Volt Switch-Off Releases - Undervoltage Coil (for Remote Switch-Off)

For the miniature circuit breakers BONEGA® P-E-P, there are various optional extras available, such as e.g. undervoltage coils, ejecting coils, auxiliary contacts etc. They are installed from the left or the right side of a MCB.

The above devices extend the functions of a MCB by overvoltage or undervoltage protection, control, regulation, remote control, remote signaling of switched-off or switched-on position of a MCB, programming, measurement and other. Those combinations enable the MCB´s to be used even for the control of complicated automation processes.

Those accessories can be interconnected among each other (e.g. MCB + undervoltage release + auxiliary signaling contact etc.). In this way, it is possible to form various combinations
 

Undervoltage coil, Type V-9:

• The width of an undervoltage coil is ½ module = 9 mm.
• It enables to switch-off the MCB if the voltage drops or if the switch-off button is depressed (usage for the circuit Total stop etc.)
• It switches off if the rated voltage value drops under 70%.
• The MCB can be switched-on with the voltage > 85 % Un.
• It avoids to switch-on the MCB again if the low-volt release is not under voltage.
• All the low-volt releases are equipped with an switch-off indicator with a red chopper-bar.