In the world of industrial automation, motors are the heart of everything. Whether it’s a conveyor belt, a pump, a fan, or a compressor—if a motor burns out due to overload, phase loss, or short circuit, an entire production line can grind to a halt. And in this race against failure, the component playing the role of “bodyguard” is the Motor Protection Circuit Breaker (MPCB).
Today, we’re taking a closer look at a standout product from Zhejiang C&J Electrical Co., ltd. (C&J Electrical)—the GV2-ME32. It belongs to the specialized category of motor protection circuit breakers, designed specifically to safeguard three-phase motors.
Product Overview: A “Protection Expert” Built for Motors
The GV2-ME32 is a 3-pole thermal-magnetic motor protection circuit breaker. Its core positioning is crystal clear: to provide precise, reliable protection for three-phase motors with rated currents from 24A to 32A.
Looking at its core specifications, the rated operational voltage covers 230/240V, 400/415V, 440V, 500V, and up to 690V, with a rated insulation voltage of 690V and a rated impulse withstand voltage of 6kV. This means it performs reliably whether in common 400V industrial distribution systems or in higher-voltage specialty applications.
Its thermal protection adjustment range is 24A to 32A, covering motor power ratings from 15kW (at 400V) to 22kW (at 690V). For most small-to-medium industrial motor applications, this is a highly practical specification range.
Technical Specifications at a Glance
| Parameter | Value |
|---|---|
| Product model | GV2-ME32 |
| Number of poles | 3P |
| Rated operational voltage (Ue) | 230/240V, 400/415V, 440V, 500V, 690V |
| Rated insulation voltage (Ui) | 690V |
| Rated impulse withstand voltage (Uimp) | 6kV |
| Thermal protection range | 24A–32A (adjustable) |
| Magnetic trip current | 537.6A (approx. 13× In) |
| Motor power range | 15kW at 400V; 22kW at 690V |
| Mechanical durability | 100,000 operating cycles |
| Electrical durability | 100,000 cycles (AC-3, 415V) |
| Power dissipation per pole | 2.5W |
| Dimensions (W×H×D) | 45 × 89 × 78.5 mm |
| Mounting | 35mm DIN rail or panel screw |
| Phase failure sensitivity | Yes |
Core Functions: Thermal-Magnetic Dual Protection
The GV2-ME32 uses thermal-magnetic trip technology, offering two types of protection simultaneously:
Thermal protection (overload protection): A bimetallic strip senses the heat generated by current. When the motor experiences sustained overload, the bimetallic strip bends and triggers the trip. The GV2-ME32′s thermal protection setting is continuously adjustable between 24A and 32A.
Magnetic protection (short-circuit protection): When a short circuit occurs, current spikes instantly, and the electromagnetic trip mechanism acts immediately. The magnetic trip current is set at 537.6A (approx. 13x rated current).
Notably, the GV2-ME32 also features phase failure sensitivity. It can detect phase loss and trip quickly, preventing motor burnout from running on two phases.
Coordination with Upstream and Downstream Devices
An MPCB doesn’t work in isolation. In a typical motor control circuit, the GV2-ME32 sits between the upstream feeder protection and the downstream contactor and thermal relay (or replaces the latter entirely).
The 45mm width of the GV2-ME32 is a deliberate design choice: it matches the standard width of a 3-pole contactor, allowing the two to be mounted side by side or even directly coupled. This integration reduces panel space and wiring complexity.
Application Scenarios: Who Does It Protect?
- Pump loads: Protects against overload during pipe blockage or valve failure.
- Fans and compressors: Handles significant starting currents without nuisance tripping.
- Conveyors: Disconnects the circuit if the motor stalls due to material jams.
- Machine tools: Reliable protection for spindle and feed motors in tight cabinets.
Installation and Wiring Notes
1. Setting the thermal adjustment dial: Set to the motor’s actual full-load current (FLA) from the nameplate.
2. Respecting ambient temperature: Factor in cabinet heat if running above 40°C.
3. Checking phase sequence: Verify sequence before startup to ensure correct rotation direction.
Mechanical and Electrical Life: Reliability That Endures
The GV2-ME32′s mechanical durability reaches 100,000 operating cycles. Assuming a motor starts 10 times per day, this supports over 27 years of operation. Power dissipation per pole is just 2.5W, ensuring high efficiency.
Common Selection Misconceptions
Why Choose the GV2-ME32 from C&J Electrical?
Specialized positioning: Optimized around motor load characteristics. We support OEM brand customization and SKD shipment to reduce logistics costs and help you build your own brand.
If you have any questions or needs, please feel free to contact us.
About Zhejiang C&J Electrical Co., ltd.
Zhejiang C&J Electrical Co., ltd. (C&J Electrical) specializes in the research, development, and manufacturing of high-quality low-voltage electrical products, covering MCB, MCCB, RCCB, RCBO, MPCB, and related categories for the global distribution market. We are committed to providing partners with reliable products, flexible customization options, and responsive technical support.
Post time: Oct-12-2026