Overview
The LS Electric GTK-22 thermal overload relay is a bimetallic motor protection device engineered for industrial automation applications. This compact unit mounts directly on GM-22 contactor frames (22A) or on DIN rail using the optional AZ-22H mounting base. The GTK-22 provides accurate thermal overload protection with integrated differential current and phase failure detection, ensuring motor circuits remain protected against sustained overcurrent and single-phase fault conditions.
Key Features
- IEC Class 10 Trip Characteristics: Fast and reliable protection with standardized thermal tripping curve
- Differential Current & Phase Failure Detection: GTK types include inherent protection against phase loss and unbalanced load conditions
- Direct Mount Design: Integrates seamlessly with GM-9, GM-12, GM-18, and GM-22 contactors for compact panel assemblies
- Manual/Automatic Reset: Flexible reset options suit both attended and unattended applications
- Trip-Free Mechanism: Guarantees mechanical tripping even if reset is forced during overload
- Compact Form Factor: 44 mm width minimizes control panel footprint
Technical Specifications
- Dual contacts (1NO + 1NC) for flexible control logic
- Ambient temperature compensation: −5 °C to +40 °C operating range
- Bimetallic sensing element for reliable thermal response
- Multiple current ratings available to match motor size requirements
- IEC Class 10 thermal tripping per IEC 60947-4-1
- Trip-free design ensures protection integrity
Typical Applications
- Three-phase and single-phase motor protection in industrial machinery
- Conveyor and pump motor control circuits
- HVAC and ventilation system motor safeguarding
- General industrial automation requiring compact overload protection
- Panel-mounted motor starter assemblies
Compatibility & Replacements
Compatible With
- LS Electric GM-22 contactors (22A frame)
- LS Electric GM-9, GM-12, GM-18 contactors (via base mounting)
- DIN rail installations with optional AZ-22H mounting base
- Standard three-phase and single-phase industrial motor circuits
- Control systems requiring IEC 60947-4-1 thermal protection
Replaces / Drop-In Replacement For
The GTK-22 series replaces legacy LS overload relay units in 22A contactor frame applications. Verify the exact current rating of your replacement unit matches the original specification before ordering.
Works With
- LS Electric GM contactors and motor starters
- Standard industrial three-phase motor circuits
- Single-phase motor protection schemes
- AC motor control and soft-start systems
- Industrial relay logic and PLC-based motor control
