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Motor Protection Circuit Breaker

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Motor Protection Circuit Breaker

Motor Protection Circuit Breakers (MPCBs) are specialized circuit breakers designed to provide protection to electric motors against overload, short circuit, and phase failure. These devices ensure safe startup and continuous operation of motors by interrupting power during abnormal conditions.

Unlike standard circuit breakers, MPCBs combine thermal and magnetic trip mechanisms tailored specifically for motor protection. They also offer adjustable current settings, manual control features, and reliable trip indication, making them ideal for motor control panels in industrial applications.

Benefits With Our MPCBs

Reliable, integrated motor protection for efficient industrial performance.

  • Built-in overload, short-circuit, and phase-loss protection
  • Adjustable thermal settings to match motor ratings
  • Compact, DIN rail-mountable design for easy panel integration

Our MPCBs conform to IEC 60947-2 and IEC 60947-4-1 standards, ensuring safe and reliable operation. Available for a wide range of motor capacities, they support manual ON/OFF operation, fault indication, and can be combined with contactors for advanced motor control systems. These breakers simplify motor circuit design while enhancing safety and performance.

Most Common Questions

Why use an MPCB instead of a standard MCB? MPCBs are designed specifically for motors and include features like phase-loss detection and adjustable overload protection, which standard MCBs do not offer. They ensure better performance, longevity, and protection for motor-driven equipment.

MPCBs are primarily used to protect electric motors from overload, short circuits, and phase failure. They are ideal for motor control panels in industrial automation, manufacturing units, HVAC systems, and water pumping applications.
Unlike standard MCBs or MCCBs, MPCBs are designed specifically for motor protection. They include adjustable thermal and magnetic trip settings, phase-loss protection, and are capable of handling high inrush currents from motor startups.
MPCBs generally offer adjustable overload protection, short-circuit protection, phase-loss detection, manual ON/OFF operation, trip indication, and are designed for direct mounting with contactors in motor starter assemblies.
MPCBs should be checked periodically for thermal calibration, contact wear, tripping accuracy, and mechanical integrity. Cleaning the terminals and ensuring proper torque settings for connections can help ensure optimal performance.