GV2 Series Motor Protection Circuit Breaker | GV2P / GV2ME MPCB
GV2 Series Motor Protection Circuit Breaker | GV2P / GV2ME MPCB
The GV2 series motor protection circuit breaker (MPCB) integrates motor control, overload thermal protection and instantaneous short-circuit protection in a single compact DIN rail module, available in two handle variants: rotary knob type (GV2P series) and push-button start-stop type (GV2ME series). With fully adjustable rated current dial for matching different three-phase motors, it features a dedicated TEST function for regular performance inspection, standard 3P L1/L2/L3 main circuit terminals and auxiliary signal contact ports. Widely used for CNC machine tools, water pumps, fans, compressors and all kinds of small-medium industrial three-phase asynchronous motor control & safety protection.
The GV2 series motor protection circuit breaker (MPCB) integrates motor control, overload thermal protection and instantaneous short-circuit protection in a single compact DIN rail module, available in two handle variants: rotary knob type (GV2P series) and push-button start-stop type (GV2ME series). With fully adjustable rated current dial for matching different three-phase motors, it features a dedicated TEST function for regular performance inspection, standard 3P L1/L2/L3 main circuit terminals and auxiliary signal contact ports. Widely used for CNC machine tools, water pumps, fans, compressors and all kinds of small-medium industrial three-phase asynchronous motor control & safety protection.
1. Product Overview
The GV2 motor protection circuit breaker (MPCB) is an all-in-one dedicated protection device exclusively designed for three-phase AC asynchronous motors, replacing the separate combination of circuit breaker + contactor + thermal overload relay into one modular unit.
This series provides two mainstream operation versions to meet different workshop operation habits:
- GV2P Series: Rotary green-black switch handle, manual ON/OFF operation with TRIP fault lockout position
- GV2ME Series: Independent green START push button & red STOP push button, intuitive one-click motor start and emergency stop
All models adopt adjustable thermal-magnetic dual trip mechanism, with front current regulation dial to match motor rated current. Standard 35mm DIN rail mounting, clear L1/L2/L3 input and T1/T2/T3 load output terminals, reserved auxiliary contact interfaces for fault signal feedback, ideal for machine tool control cabinets, HVAC equipment, pumping stations and automated production line motor power control.
2. Core Product Features
1. Two Optional Operation Structures for Different Scenarios
Type 1: GV2P Rotary Knob Version
- Integrated rotary green lever handle with 3 positions: OFF → ON → TRIP
- Automatic lock at TRIP position after overload/short-circuit fault, must manually reset to restore power, avoid accidental motor restart during fault maintenance
- Simple single-hand operation, compact structure saving cabinet space, suitable for unattended motor equipment
Type 2: GV2ME Push Button Start-Stop Version
- Separate green START button for motor power-on, red emergency STOP button for instant power cut
- Independent emergency stop button meets industrial safety operation standards, convenient for frequent manual start-stop equipment like machine tools
- Clear visual distinction of start/stop buttons, reduce misoperation risks for workshop operators
2. Adjustable Thermal-Magnetic Dual Protection System
- Thermal Overload Protection: Front adjustable current dial, set trip current according to motor rated load; bimetallic strip delayed trip prevents motor winding burnout under long-time overload
- Instant Magnetic Short-Circuit Protection: Electromagnetic trip structure cuts power within milliseconds when short circuit occurs, block huge surge current to protect motor coils and upstream cables
All protection thresholds can be precisely calibrated on-site without extra auxiliary components.
3. Built-in Independent TEST Inspection Function
4. Standard 3P Full Three-Phase Isolation Design
5. Reserved Auxiliary Contact Interface
6. Compact DIN Rail Modular Installation
7. Wide Matching Current Range
Full segmented adjustable current grades cover small to medium three-phase motors:
0.1A ~ 32A complete specifications, can match fans, pumps, compressors, CNC machine tool spindles and other low & medium power industrial motors.
3. Working Conditions
- Rated Operational Voltage: AC 400V 50Hz three-phase
- Ambient operating temperature: -10℃ ~ +55℃
- Protection Grade: IP20, only installed inside fully enclosed indoor control cabinets; not suitable for outdoor splash, heavy dust or salt fog environments
- Surrounding atmosphere: Free of corrosive gas, flammable dust and conductive metal particles
- Altitude: Full rated protection performance below 2000 meters above sea level
- Vibration resistance: Tolerate mild mechanical vibration of machine tool workshops; avoid continuous strong impact
- Humidity: Relative humidity ≤85%, no condensation inside the MPCB housing
4. Unified Technical Specifications
| Parameter | Unified Specification for GV2 Series MPCB |
|---|---|
| Product Series | GV2P (Rotary Handle) / GV2ME (Push Button Start-Stop) Motor Protection Circuit Breaker |
| Poles | 3P Three Phase (L1 L2 L3 input, T1 T2 T3 motor output) |
| Rated Working Voltage | AC 400V 50Hz |
| Protection Mechanism | Thermal overload delayed trip + magnetic instantaneous short-circuit trip |
| Adjustable Current Range | Full grades 0.1A ~ 32A customizable |
| Operation Mode | GV2P: Rotary ON/OFF/TRIP lever; GV2ME: Separate START / STOP push buttons |
| Inspection Function | Front manual TEST button for protection function verification |
| Auxiliary Function | Reserved auxiliary contact mounting port for fault signal feedback |
| Mounting Method | Standard 35mm DIN rail modular snap-in installation |
| Housing Material | High flame-retardant heat-dissipating insulated engineering plastic |
| Core Functions | Three-phase motor manual control, overload protection, short-circuit fault protection |
5. Typical Applications
- CNC lathe, milling machine, textile machinery spindle motor control cabinets
- Industrial water pumps, sewage pumps, cooling fan motor safety protection
- HVAC central air conditioning, air compressor, refrigeration equipment motor control
- Automated assembly line, packaging machine, conveyor belt motor power control
- Agricultural irrigation pump, ventilation fan three-phase motor distribution box
- Small industrial production equipment independent motor safety switch
6. Frequently Asked Questions (FAQ)
1. What is the difference between GV2P and GV2ME models?
2. Why choose MPCB instead of ordinary MCB miniature circuit breaker for motors?
3. Can I install auxiliary contacts on this GV2 breaker?
4. How to set the correct protection current dial for a motor?
5. Can the TEST button be pressed frequently?
6. Is outdoor installation allowed?
7. Technical Documentation & Support
Download the full datasheet for detailed specifications, wiring diagrams, and installation instructions.
Exclusive project customization supports OEM/ODM mode, contact our technical team to create a complete set of landing solutions for you.
Request a quote with your project details for bulk pricing, lead times, and compliance certifications.
1. Product Overview
The GV2 motor protection circuit breaker (MPCB) is an all-in-one dedicated protection device exclusively designed for three-phase AC asynchronous motors, replacing the separate combination of circuit breaker + contactor + thermal overload relay into one modular unit.
This series provides two mainstream operation versions to meet different workshop operation habits:
- GV2P Series: Rotary green-black switch handle, manual ON/OFF operation with TRIP fault lockout position
- GV2ME Series: Independent green START push button & red STOP push button, intuitive one-click motor start and emergency stop
All models adopt adjustable thermal-magnetic dual trip mechanism, with front current regulation dial to match motor rated current. Standard 35mm DIN rail mounting, clear L1/L2/L3 input and T1/T2/T3 load output terminals, reserved auxiliary contact interfaces for fault signal feedback, ideal for machine tool control cabinets, HVAC equipment, pumping stations and automated production line motor power control.
2. Core Product Features
1. Two Optional Operation Structures for Different Scenarios
Type 1: GV2P Rotary Knob Version
- Integrated rotary green lever handle with 3 positions: OFF → ON → TRIP
- Automatic lock at TRIP position after overload/short-circuit fault, must manually reset to restore power, avoid accidental motor restart during fault maintenance
- Simple single-hand operation, compact structure saving cabinet space, suitable for unattended motor equipment
Type 2: GV2ME Push Button Start-Stop Version
- Separate green START button for motor power-on, red emergency STOP button for instant power cut
- Independent emergency stop button meets industrial safety operation standards, convenient for frequent manual start-stop equipment like machine tools
- Clear visual distinction of start/stop buttons, reduce misoperation risks for workshop operators
2. Adjustable Thermal-Magnetic Dual Protection System
- Thermal Overload Protection: Front adjustable current dial, set trip current according to motor rated load; bimetallic strip delayed trip prevents motor winding burnout under long-time overload
- Instant Magnetic Short-Circuit Protection: Electromagnetic trip structure cuts power within milliseconds when short circuit occurs, block huge surge current to protect motor coils and upstream cables
All protection thresholds can be precisely calibrated on-site without extra auxiliary components.
3. Built-in Independent TEST Inspection Function
4. Standard 3P Full Three-Phase Isolation Design
5. Reserved Auxiliary Contact Interface
6. Compact DIN Rail Modular Installation
7. Wide Matching Current Range
Full segmented adjustable current grades cover small to medium three-phase motors:
0.1A ~ 32A complete specifications, can match fans, pumps, compressors, CNC machine tool spindles and other low & medium power industrial motors.
3. Working Conditions
- Rated Operational Voltage: AC 400V 50Hz three-phase
- Ambient operating temperature: -10℃ ~ +55℃
- Protection Grade: IP20, only installed inside fully enclosed indoor control cabinets; not suitable for outdoor splash, heavy dust or salt fog environments
- Surrounding atmosphere: Free of corrosive gas, flammable dust and conductive metal particles
- Altitude: Full rated protection performance below 2000 meters above sea level
- Vibration resistance: Tolerate mild mechanical vibration of machine tool workshops; avoid continuous strong impact
- Humidity: Relative humidity ≤85%, no condensation inside the MPCB housing
4. Unified Technical Specifications
| Parameter | Unified Specification for GV2 Series MPCB |
|---|---|
| Product Series | GV2P (Rotary Handle) / GV2ME (Push Button Start-Stop) Motor Protection Circuit Breaker |
| Poles | 3P Three Phase (L1 L2 L3 input, T1 T2 T3 motor output) |
| Rated Working Voltage | AC 400V 50Hz |
| Protection Mechanism | Thermal overload delayed trip + magnetic instantaneous short-circuit trip |
| Adjustable Current Range | Full grades 0.1A ~ 32A customizable |
| Operation Mode | GV2P: Rotary ON/OFF/TRIP lever; GV2ME: Separate START / STOP push buttons |
| Inspection Function | Front manual TEST button for protection function verification |
| Auxiliary Function | Reserved auxiliary contact mounting port for fault signal feedback |
| Mounting Method | Standard 35mm DIN rail modular snap-in installation |
| Housing Material | High flame-retardant heat-dissipating insulated engineering plastic |
| Core Functions | Three-phase motor manual control, overload protection, short-circuit fault protection |
5. Typical Applications
- CNC lathe, milling machine, textile machinery spindle motor control cabinets
- Industrial water pumps, sewage pumps, cooling fan motor safety protection
- HVAC central air conditioning, air compressor, refrigeration equipment motor control
- Automated assembly line, packaging machine, conveyor belt motor power control
- Agricultural irrigation pump, ventilation fan three-phase motor distribution box
- Small industrial production equipment independent motor safety switch
6. Frequently Asked Questions (FAQ)
1. What is the difference between GV2P and GV2ME models?
2. Why choose MPCB instead of ordinary MCB miniature circuit breaker for motors?
3. Can I install auxiliary contacts on this GV2 breaker?
4. How to set the correct protection current dial for a motor?
5. Can the TEST button be pressed frequently?
6. Is outdoor installation allowed?
7. Technical Documentation & Support
Download the full datasheet for detailed specifications, wiring diagrams, and installation instructions.
Exclusive project customization supports OEM/ODM mode, contact our technical team to create a complete set of landing solutions for you.
Request a quote with your project details for bulk pricing, lead times, and compliance certifications.
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