Knob Operation Electrical Motor Protection Circuit Breaker

Model Code

As trusted suppliers, Saide® ensures accessibility to high-quality MPCBs equipped with adjustable overload protection, phase fault detection, and thermal delay mechanisms. Our commitment to excellence positions Saide® as a leading name in delivering top-tier electrical components. Elevate your motor protection standards with Saide®—where quality meets innovation.

Saide® Knob Operation Electrical Motor Protection Circuit Breaker, or MPCB, is a specialized electromechanical device compatible with both 60 Hz and 50 Hz motor circuits. This device serves crucial functions to ensure a safe electrical supply for motors:

Protection Against Electrical Faults: The MPCB safeguards against various electrical faults, including short circuits, line-to-ground faults, and line-to-line faults. It can efficiently interrupt any fault below its breaking capacity.

Motor Overload Protection: Offering adjustable overload protection, the MPCB intervenes when a motor draws electric current beyond its specified value for an extended duration. This feature is customizable to suit specific motor requirements.

Protection Against Phase Unbalances and Loss: The MPCB provides protection against phase unbalances and phase loss, both of which can cause severe damage to a three-phase motor. It promptly disconnects the motor upon detecting such faults.

Thermal Delay Mechanism: To prevent immediate motor restart after an overload, the MPCB incorporates a thermal delay, allowing the motor time to cool down. This precautionary measure helps prevent permanent damage to an overheated motor.

Motor Circuit Switching: Equipped with buttons or dials, MPCBs facilitate motor circuit switching, offering convenient control over the motor's operational status.

Fault Signaling with LED Display: Most MPCB models feature LED displays that activate when a fault occurs. This visual indication alerts nearby personnel that a fault has been detected, emphasizing that the motor should not be reconnected until the issue is addressed.

Automatic Reconnection (Optional): Some MPCB models offer automatic reconnection after a specified cool-down time following an overload. This feature adds convenience while ensuring that the motor restarts safely.

Given the significant investment in electric motors, the role of the motor protection circuit breaker is paramount. Incorrect or inadequate protection can lead to costly repairs or even the need for complete equipment replacement. An electric motor properly safeguarded by an MPCB is poised for an extended service life, emphasizing the critical importance of these protection devices in industrial and commercial applications.