VD4 series medium voltage vacuum circuit-breakers with lateral operating mechanism feature the separate pole
construction technique. Each pole houses a vacuum interrupter which is encased in the resin when the cylinder is moulded thanks to a special manufacturing process.
This construction method protects the vacuum interrupter from shock, pollution and condensation. The operating mechanism is the EL trip-free stored energy type with independent opening and closing regardless of the operator’s action. The EL operating mechanism is widely used in all VD4 series circuit-breakers with frontal control.
The circuit-breaker can be remote controlled when fitted with dedicated electrical accessories (gearmotor, opening andclosing release).
The operating mechanism, the three poles and the current sensors (if installed) are assembled on a metal frame without wheels. The construction is extremely compact, strongly built and low in weight.
VD4 series circuit-breakers with lateral operating mechanisms are life-long sealed pressure devices (Standards IEC 62271-100 and CEI EN 62271-100).

Technical Specification: