VD4/R
indoor vacuum circuit breaker
VD4/R circuit breakers with lateral operating mechanisms can be used in all medium voltage secondary distribution systems and MV/LV transformer substations in factories, industrial workshops and in the services sector. Thanks to installation (on request) of the self-supplied PR521 overcurrent release with microprocessor, the VD4/R breakers are suitable for use in unmanned MV/LV transformer substations without auxiliary power supply.

Product scope
Medium voltage circuit breakers with lateral mechanical actuator (spring mechanism) for secondary distribution, up to 24 kV, 1250 A, 25 kA.
Key benefits
The compact medium voltage vacuum circuit breaker solution for low-duty distribution
Easy and fast to install thanks to the optional integrated solution: onboard-tested relay and current sensors/trasformers
Ideal solution for metal-clad switchgear
Key features
Modular spring-operated mechanical actuator ensuring easy operation even without auxiliary supply
Interchangeable with HD4/R
Performs fast operating cycles