Crabtree Voltage Operated Earth Leakage Circuit Breaker (VOELCB)

Old voltage operated earth leakage circuit breaker made by Crabtree. These were one of the most common types, the other being the Chilton type. These devices have not been used in the UK for over 30 years.

This one does actually work, although the terminal covers are missing.

Internally, it contains both the earth leakage trip coil and an overload trip coil. A separate contact connects the E and F terminals together when the switch is in the Off position.

Pictures of this device: http://xo4.uk/?Lq0

Other types:
GEC: http://youtu.be/2yquvqto-pk
Chilton: http://youtu.be/mbller272pc

Видео Crabtree Voltage Operated Earth Leakage Circuit Breaker (VOELCB) канала John Ward