Schneider GV3P50 Motor Circuit Breaker

The Schneider GV3P50 motor circuit breaker is an ideal choice for protecting 22kW three-phase motors. Featuring thermal-magnetic tripping, an adjustable current range of 37–50A, a breaking capacity of 100kA and IP20 ingress protection rating, it is widely deployed in industrial automation, fluid conveyance, building facilities and other sectors. Key points: match breaker rating to motor power and operating conditions; avoid non-recommended applications including DC circuits, high-frequency starting and high-altitude environments. Combined with contactors and auxiliary contacts, it forms a complete motor protection and control system.

1. Core Technical Specification Table

III. Full GV3P Series Model List

1. Alternative Cross Reference (Replacement Models)
2. In-house Schneider Replacement

2. Cross-Brand Equivalents

1. Application Environments & Field Cases
2. Recommended Applications

Industrial Automation: Overload & short-circuit protection for 3-phase asynchronous pumps, fans and compressors

Manufacturing: Production line motor control & machine tool protection

Building Electrical: Central air-conditioning & fire-fighting pump control

Energy Sector: Front-end protection for small generator sets and inverters

Infrastructure: Wastewater treatment equipment & bulk material conveying systems

2. Non-Recommended Applications

DC Circuits: Designed exclusively for AC; abnormal tripping characteristics under DC supply

Ultra-Frequent Cycling: Not applicable for >30 starts per hour (accelerates trip unit aging)

High Altitude: Derating mandatory above 2000m elevation

Corrosive Atmosphere: No anti-corrosion coating; unsuitable for strong acid/alkali surroundings

3. Typical Application Cases

Case 1: Fan System Protection for Food Processing Plant

Equipment: 3×22kW centrifugal fans, 380V/50Hz

Solution: GV3P50 + LC1D65 contactor combination

Outcome: Triple protection against overload, short-circuit & phase loss; equipment failure rate reduced by 40%

Case 2: Submersible Sewage Pump Control at Wastewater Plant

Equipment: 4×22kW submersible sewage pumps, 380V/50Hz

Solution: GV3P50 + auxiliary contacts + PLC interlock control

Outcome: Full motor protection plus remote monitoring, lower maintenance expense

1. Air Shipment Compliance & CE Certification
2. Air Freight Compliance

UN38.3: Not required; no built-in lithium battery or supercapacitor inside

Shipping Class: General commodity without special transport restriction

Packing: Standard industrial carton to avoid transit damage

Shipping Document: Copy of CE certificate + RoHS compliance declaration available

2. CE Certification Details

Applicable Standards: IEC 60947-2 (LV switchgear) & IEC 60947-4-1 (motor control equipment)

Valid Region: European Economic Area (EEA) & global territories accepting CE marking

Validity: Permanently valid complying with current normative requirements

Inquiry: Check Schneider official website product page or certification database

VII. Common Fault Troubleshooting

VIII. Sizing Guidelines & Quick Selection Rules

Quick Selection Formula Summary

> GV3P series 3-pole thermal-magnetic breakers;

> Suffix number denotes upper current limit;

> 40 = 25–40A, 50 =37–50A, 65 max at 65A;

> Power matching rule: 40 for 18.5kW, 50 for 22kW, 65 for 30kW.

Quick Rules

1. Current Matching: Motor rated current ×1.1 ≤ breaker setting ≤ motor rated current ×1.3
2. Power Reference: At 400V, GV3P50 matches 22kW motor (~44A nominal)
3. Accessory Option: Auxiliary contact: GV3AE11 (1NO+1NC) / GV3AE20 (2NO)
4. Mounting Spacing: DIN rail install; ≥10mm clearance for heat dissipation, away from heat-generating devices
5. Installation & Wiring Instruction
6. Installation Steps

Confirm standard 35mm DIN rail

Snap breaker firmly onto rail

Incoming power: top-feed or bottom-feed acceptable

Motor cable connection: terminal tightening torque 2.5Nm recommended

2. Wiring Specification

Wire cross-section range: 1.5mm² min ~35mm² max

Terminal: EverLink BTR screw terminal compatible with copper/aluminum conductors

Phase marking: R/S/T corresponds to L1/L2/L3; no neutral connection (3P without N pole)

3. EMC Protection

Maintain ≥50mm clearance between breaker and contactors

Separate control wiring from power cables to avoid cross-interference

Install EMC filter if needed for EMI suppression

Full Application Overview for Schneider GV3P50 Motor Circuit Breaker

1. Core Application Summary

Schneider GV3P50 is a 3-pole thermal-magnetic motor circuit breaker with adjustable trip 37–50A, rated for 22kW three-phase asynchronous motors @400V. Its core functions: motor overload, short-circuit & phase-loss protection plus manual switching, widely used in below industries:

1. Detailed Application Classification
2. Industrial Automation & Manufacturing

2. Fluid Conveyance Systems

3. Building & Municipal Infrastructure

4. Other Industrial Sectors

III. Non-Recommended Applications (Avoidance Guide)

1. Detailed Field Application Cases

Case1: 22kW Fan Protection in Food Factory

Setup: 3×22kW centrifugal fans 380V/50Hz, independent control per unit

Scheme: GV3P50 + LC1D65 contactor + GV3AE11 auxiliary contact

Logic: Manual/Auto switch; auto stop & alarm upon overload

Result: Triple protection realized; failure rate -40%, maintenance cost -30%

Case2: Submersible Sewage Pump Control at WWTP

Setup: 4×22kW submersible sewage pumps 380V/50Hz, alternating operation

Scheme: GV3P50 + PLC interlock + level transducer

Condition: Humid environment, 10~15 starts/hour frequent cycling

Result: Anti-stall burnout + remote auto-switching, improved system reliability

Case3: Central Air-conditioning for Shopping Mall

Setup: 3×22kW chilled water pumps with VFD control 380V/50Hz

Scheme: GV3P50 + inverter + temperature sensor

Feature: Speed auto-adjust by return water temp; coordinated protection by inverter + breaker under overload

Result: ≥30% energy saving, service life doubled, superior system stability

1. Recommended Matching Components & Selection Tips
2. Recommended Matching List

2. Sizing Rules
3. Power Match: 22kW (~44A @400V) optimally paired with GV3P50 (37–50A)
4. Trip Setting: Motor rated current ×1.1 ≤ breaker setting ≤ motor rated current ×1.3
5. Mount Clearance: ≥50mm gap to adjacent contactors; ≥10mm free space for heat dissipation
6. Wiring Torque: Cable terminal tightening torque fixed at 2.5Nm
7. Ambient Derate: Derate 1% rated current per every 1°C rise above +40°C ambient temperature