Motor Protection Circuit-Breakers

Schneider Electric is a global leader in motor control and protection, offering a comprehensive range of Motor Protection Circuit Breakers (MPCBs) designed to ensure the longevity of your industrial equipment. Primarily centered around the world-renowned TeSys range, these devices provide a specialized, high-performance alternative to standard thermal-magnetic circuit breakers.

While a standard breaker protects cables from overloads, an MPCB is specifically engineered to handle the unique electrical demands of electric motors—balancing sensitive protection with the ability to withstand high inrush currents during startup.

Key Functions and Protection Features

Schneider Electric MPCBs integrate several critical functions into a single, compact unit, reducing the need for additional components like fuses or separate overload relays.

Short-Circuit Protection: Instantaneous magnetic tripping to protect the motor and its branch circuit from catastrophic faults.
Overload Protection: Adjustable thermal protection that mimics the motor’s heating curve, preventing damage from sustained over-current.
Phase Failure Sensitivity: Advanced detection that trips the breaker if one phase is lost, preventing the motor from "single-phasing" and burning out.
Isolation: Provides a safe, visible means of disconnecting the motor from the power source for maintenance.