Motor Protection Circuit Breaker (MPCB) 24-32A: Essential 3-Phase Motor Safeguard

Uncompromised Protection for Your Electric Motors: Enhance Safety & Longevity

Electric motors are the workhorses of industrial and commercial operations. However, they're vulnerable to various electrical faults – from sustained overloads and sudden short circuits to damaging phase failures. Without robust protection, these events can lead to costly motor damage, extensive downtime, and significant safety hazards.

Our Motor Protection Circuit Breaker (MPCB) 24-32A is specifically engineered to provide comprehensive and reliable safeguarding for your three-phase electric motors. Combining a precise thermal-magnetic trip mechanism with an adjustable current range, this MPCB ensures your motors operate safely and efficiently while being fully protected against critical electrical faults. Its compact, durable design and high breaking capacity make it an indispensable component for any industrial or commercial motor application.

Key Features & Benefits

• Comprehensive Motor Protection: Provides robust safeguarding against the three primary motor threats:

  • Overloads: Thermal trip mechanism protects against sustained excessive current.

  • Short Circuits: Magnetic trip mechanism offers instant disconnection during severe faults.

  • Phase Failures: Detects and trips on loss of a phase, preventing motor burnout.

• Adjustable Current Range (24-32A): Allows for precise setting of the motor's nominal current, ensuring tailored and optimal protection for motors within this specific amperage range.

• High Breaking Capacity (10kA at 400V AC): Guarantees safe and effective interruption of high fault currents, protecting both the motor and the electrical system.

• Thermal-Magnetic Trip Technology: Combines the benefits of both thermal (for overloads) and magnetic (for short circuits) protection in a single, reliable device.

• Compact & Space-Saving Design: Ideal for integration into control panels and electrical enclosures where space is often at a premium.

• Durable & Robust Construction: Built to withstand the harsh conditions of industrial and commercial environments, ensuring long-term reliability.

• Easy & Secure Installation: Features convenient screw clamp terminals for straightforward and secure wiring connections.

• Intuitive Push-Button Operation: Simple and reliable push-button controls for ON/OFF and trip reset functions.

• Compliance with Standards: Manufactured to meet stringent international standards, including IEC 60947-2 (Circuit-breakers) and IEC 60947-4-1 (Contactors and motor-starters), ensuring quality and safety.

How a Motor Protection Circuit Breaker (MPCB) Works

A Motor Protection Circuit Breaker (MPCB) is an all-in-one device that combines the functions of a circuit breaker, an overload relay, and sometimes a disconnector.

• Thermal Protection (Overload): Inside, a bimetallic strip or similar thermal element heats up as current passes through it. If the current exceeds the set limit (24-32A range) for a prolonged period (indicating an overload), the bimetallic strip bends and trips the breaker, protecting the motor from overheating.

• Magnetic Protection (Short Circuit): A magnetic coil detects sudden, high surges in current (characteristic of a short circuit). This causes an immediate electromagnetic force that trips the breaker almost instantaneously, preventing catastrophic damage.

• Phase Failure Protection: Many MPCBs also monitor all three phases. If one phase is lost (a phase failure), the imbalance can cause severe damage to a three-phase motor. The MPCB detects this imbalance and trips, protecting the motor.

The push-button operation allows for manual switching and easy resetting after a trip.

Technical Specifications

• Product Type: Motor Protection Circuit Breaker (MPCB)

• Adjustable Current Range: 24-32 Amps (A)

• Voltage Rating: Up to 690V AC

• Poles: 3P (Three-phase)

• Breaking Capacity: 10kA at 400V AC

• Trip Mechanism: Thermal-Magnetic

• Control Type: Push-button operation

• Terminals: Screw Clamp

• Protection Standards: IEC 60947-2, IEC 60947-4-1

• Housing Protection: IP20 (Finger-safe, protected against solid objects >12.5mm)

• Mounting: DIN Rail Mountable

• Certifications: CE, RoHS

Ideal Applications

This 24-32A MPCB is an essential component for protecting electric motors in a wide array of industrial and commercial settings, including:

• Pumps & Fans: Safeguarding motors in HVAC systems, water pumps, and ventilation units.

• Conveyors & Material Handling: Protecting motors in conveyor belts, hoists, and lifting equipment.

• Compressors: Ensuring reliable operation of air compressors and refrigeration units.

• Machine Tools: Providing critical protection for motors in lathes, drills, mills, and other machinery.

• Industrial Automation: Integral to control panels for various automated processes.

• HVAC Systems: Protecting motors in large air conditioning units and ventilation fans.

Important Installation & Safety Notice

Installation, wiring, and maintenance of Motor Protection Circuit Breakers must ONLY be performed by a qualified and licensed electrician or electrical engineer in strict accordance with all local electrical codes, safety regulations, and the manufacturer's instructions. Always ensure the main power supply to the circuit is disconnected and locked out before any work is carried out. Improper installation or selection can lead to serious electrical hazards, equipment damage, or fire.

Frequently Asked Questions (FAQs)

Q1: What is the main difference between an MPCB and a standard circuit breaker?

A1: While both protect against overcurrents, an MPCB is specifically designed for motor protection. It integrates overload (thermal), short-circuit (magnetic), and often phase failure protection into a single device, tailored to the unique characteristics and vulnerabilities of electric motors.

Q2: How do I select the correct current range (e.g., 24-32A) for my motor?

A2: You should select an MPCB whose adjustable current range encompasses your motor's Full Load Amperage (FLA), as specified on the motor's nameplate. The MPCB should then be set to match the motor's FLA precisely. Consult a qualified electrician for proper sizing.

Q3: Can this MPCB protect against phase loss?

A3: Yes, this MPCB is designed to protect against phase failures (loss of one phase in a three-phase system), which can cause severe damage to motors.

Q4: Is this MPCB suitable for single-phase motors?

A4: No, this is a 3-pole (3P) MPCB, specifically designed for three-phase electric motors. Single-phase motors require different protection devices.

Q5: What does "10kA breaking capacity" mean?

A5: 10kA (kiloamperes) breaking capacity means the MPCB can safely interrupt a short-circuit current of up to 10,000 amps at 400V AC without being destroyed, protecting the electrical system and downstream equipment from catastrophic damage.

Safeguard your valuable electric motors and ensure uninterrupted operations. Add this Motor Protection Circuit Breaker 24-32A to your cart today!