3RV circuit-breakers are compact, current-limiting circuit-breakers designed for fuseless motor feeders of the 21st century. The circuit-breakers are therefore referred to as “Motor Protection Circuit Breai‹ers” (MPCB).
The circuit-breaker fulfils the isolation conditions as per IEC 947-3 and the additional test conditions for circuit breakers with isolation characteristics as per IEC 947-2. The MPCBs can be deployed as mains and emergency stop circuit breakers with appropriate accessories.
MPCB / contactor combination for fuseless motor feeder (type-2 coordinated).
Rotary operating mechanism.
MPCB with "relay function”. A totally new concept.
Suitable for service temperatures up to 70°C
Current limiting type. Tripping time 5 msec.
Wide range of site fittable accessories, common for complete range.
Trip free mechanism.
Short circuit proof for faults upto 50 KA - high system uptime.
Visual On / Off / Trip indication, reset function, padlock feature.
"Relay function™ — results in longer life of the system because the contactor interrupts overload faults, instead of the MPCB.
Reliability of protection is ensured.
Faster fault clearing for enhanced life of installations.
Flexibility in designing the system with minimum inventory.