Schneider GV2ME32C 3-pole thermal-magnetic circuit breaker

Schneider GV2ME32C is a 3-pole thermal-magnetic circuit breaker specifically designed for motor control and protection. It is suitable for AC circuits with a frequency of 50/60Hz and a voltage up to 690V, with a rated current adjustment range of 24-32A.

1. Core Functions and Protection Features

Full-Function Protection: Integrates overload, short-circuit, phase failure, locked rotor, and three-phase unbalance protection, complying with IEC 60947-2 and IEC 60947-4-1 standards.

Thermal-Magnetic Trip Mechanism:

  Thermal Overload Protection: Detects overload current through a bimetallic strip, with an operating time meeting Class 10 standards (tripping within 10 seconds) and manual reset capability.

  Magnetic Trip Protection: Features a fixed instantaneous operating current of 416A±20% for short-circuit protection, ensuring reliable non-operation under starting inrush current.

Auxiliary Function Expansion: Supports installation of accessories such as undervoltage release (MN), shunt release (MX), and auxiliary contacts (e.g., YEDGVAE11, 1NO+1NC) to achieve remote control and status feedback.

2. Structural Design and Installation

Compact Size: With a width of only 45mm, it can be directly mounted on a 35mm DIN rail, supporting horizontal or vertical fixing to save distribution cabinet space.

Protection and Certifications: The main body has an IP20 protection rating, reaching IP55 with a cover; certified by CCC, CE, UL, CSA, etc., suitable for industrial and commercial environments.

Wiring Method: Adopts screw-clamp terminals compatible with various cable specifications. Wiring torque must be operated in accordance with manual requirements to ensure reliability.

3. Typical Application Scenarios

Motor Direct Start Control: Serves as a full-voltage starter, replacing the traditional contactor + thermal relay combination to simplify circuit design.

Protection for Pumps, Fans, and Other Equipment: Suitable for three-phase asynchronous motors with a rated current ≤32A, demonstrating stable performance especially in scenarios with frequent start-stop operations or large ambient temperature fluctuations.

Industrial Automation Systems: Cooperates with PLC or DCS systems to achieve remote emergency shutdown through shunt releases, enhancing system safety.

4. Selection and Usage Notes

Current Matching: Select the setting range based on the motor's rated current. For example, the 24-32A GV2ME32C is suitable for motors with a rated current ≤32A. However, it should be noted that high-efficiency motors (e.g., IE5) may have higher starting inrush current, so it is necessary to verify whether the magnetic trip value is sufficient.

Environmental Adaptability: Operating temperature range is -20℃ to +60℃. No additional adjustments are required when ambient temperature changes, as the thermal trip characteristic is equipped with built-in temperature compensation.

Installation Specifications: Ensure the spacing between the circuit breaker and adjacent equipment meets heat dissipation requirements. Avoid cable loosening during wiring to prevent overheating.

5. Market Feedback and Alternative Solutions

User Reviews: Users report high reliability and long service life (electrical life up to 100,000 operations). However, it should be noted that false tripping may occur in high-efficiency motor applications due to insufficient magnetic trip value. It is recommended to prioritize upgraded models after 2023 (with improved magnetic trip value).

Alternative Models: For a larger current range (e.g., 25-80A), the Schneider GV3ME series can be considered; for electronic protection functions, the GV4PEM series offers more flexible setting options.

6. Technical Parameters and Price Reference

7. Maintenance and Troubleshooting

Regular Inspection: Clean contacts every 6 months, and check terminal tightness and trip mechanism flexibility.

Common Faults:

  False Tripping: May be caused by insufficient magnetic trip value or excessively small thermal setting current. Verify the motor's starting current and ambient temperature.

  Contact Ablation: Replace the circuit breaker after long-term overload or short circuit to avoid protection failure due to contact adhesion.

Summary

With its compact design, full-function protection, and high reliability, the GV2ME32C is an ideal choice for medium and low-power motor control. During selection, it is necessary to consider motor characteristics (e.g., starting current, efficiency class) and application environment, and match accessories if necessary to meet complex control requirements. For high-efficiency motor applications, it is recommended to prioritize upgraded GV2ME models or electronic protection solutions to ensure long-term stable operation.