Motor Protection Circuit Breakers By Controls India Private Limited

Short-Circuit Breaking Capacity
The MPCB can be used in 100kA short circuit current circuits for three-phase, 240V motors with rated capacity upto 15kW, and in 50kA short circuit current circuits for three phase, 415V motors with rated capacity up to 30kW.
When numerous small and medium motor loads exist in a circuit requiring high breaking capacity, there is no high breaking capacity circuit breaker with a small rated current for a short circuit protection.

Back-up breaking system
When back-up MCCB is installed upstream to solve the problem described in a Shortcircuit breaking protection a above, a short in one of the load circuits also trips the upstream breaker and stops the other operating circuits.
Despite their compact size, the MPCB provides high-performance short-circuit current breaking. They eliminate the need for an upstream circuit breaker for back-up use.

Overload Protection
Motor Protection breakers cannot be adjusted to match the rated current of the motor being protected.
Equipped with a wide range current adjustment dial (with maximum/minimum ratio of 1.4
to 1.6), the MPCB easily adjusts to match the rated current of the motor, for optimum protection.

Control Panel Size
Considerable space is required to install a back-up circuit breaker or a combination starter consisting of a circuit breaker and a thermal overload relay. As a result, the panel size has to be increased.
The compact size of the MPCB, including overload relay functions, enables a smaller