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LS GTH Series Thermal Overcurrent Relays
LS GTH Series Thermal Overcurrent Relays - Image 2
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LS GTH Series Thermal Overcurrent Relays

Manufacturer:  LS Electrics
Rated current: 22-600A
Number of Electrodes: 3
Model of the matching contactor: GMC 9-800 Contactor

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Product Description

An LS GTH relay is a thermal overload relay produced by LS Electric. These relays are designed to protect electric motors from overloads and phase failures, typically used in conjunction with contactors. They are electromechanical devices that use heat to detect overcurrents and trip the circuit, preventing damage to the motor.

Features and benefits

Compatible with LS GMC contactors, it simplifies integration into motor starters, machinery, and power distribution systems.

  • Dual Protection: Safeguards motors against overload and phase loss

  • Flexible Reset: Supports manual/auto reset (auto-reset after ~1 min)

  • Contact Configuration: 1NO+1NC trip contacts for control signaling

  • Fast Tripping: Class 10A tripping standard (6× current in ≤10 sec)

  • Compact Design: Only 44mm width for space-saving installation

  • Free-Trip Mechanism: Ensures reliable operation without mechanical binding

  • Temp Compensation: Stable performance across -5°C to +40°C

Technical Specifications

ModelCompatible ContactorSetting Current Range(A)

GTH-22

GMC-9,GMC-12,GMC-18,GMC220.1-6
GTH-40GMC-32,GMC-400.1-40
GTH-85GMC-50,GMC-65,GMC-75,GMC-8528-85
GTH-100GMC-100,GMC-12541-107
GTH-150GMC-15041-130
GTH-220GMC-180,GMC-22080-200
GTH-400GMC-300,GMC-400107-350
GTH-600GMC-600,GMC-800250-660

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