SQUARE D
SQUARE D LRD22L Overload Relay 17-24 A 690 V AC
Thermal overload relay protects motors from 17 to 24 amps at 690 volts AC with auto or manual reset and screw clamp terminals
- Protects motors from 17 A to 24 A overloads with thermal trip class 20
- Handles up to 690 V AC for industrial three-phase power systems
- Mounts directly on TeSys Deca contactors using screw clamp terminals
- Offers both automatic and manual reset options for flexible recovery
- Provides 1NO/1NC auxiliary contacts for status signalling and control circuits
SQUARE D LRD22L Overload Relay
The SQUARE D LRD22L is a thermal overload relay designed for three-phase motor protection in industrial control panels. It mounts directly onto TeSys Deca contactors using screw-clamp terminals and offers an adjustable current range from 17 to 24 amperes. The unit operates at up to 690 volts AC and includes both normally open and normally closed auxiliary contacts. Trip Class 20 provides a standard delay for general-purpose motor starting duties.
Suitable for motor circuits needing adjustable
This relay suits maintenance engineers and panel builders who need a direct-mount overload with auto and manual reset options for motors drawing between 17 and 24 amperes. It is not intended for applications requiring electronic overload functions, communication modules or a NEMA-rated frame size. Buyers needing lower or higher current ranges, different trip classes or DIN-rail mounting without a contactor should select an alternative device.
Thermal trip behaviour under sustained overload
Under continuous overload the thermal element heats progressively and trips at the Class 20 time–current curve, preventing nuisance trips during normal motor acceleration. After tripping the relay can be reset manually or automatically once the element cools. The 690 V AC insulation rating ensures reliable operation during prolonged fault conditions without degradation of the screw-clamp connections.
Highlights
- Protects motors from 17 A to 24 A overloads with thermal trip class 20
- Handles up to 690 V AC for industrial three-phase power systems
- Mounts directly on TeSys Deca contactors using screw clamp terminals
- Offers both automatic and manual reset options for flexible recovery
- Provides 1NO/1NC auxiliary contacts for status signalling and control circuits
Specifications
| Brand | SCHNEIDER ELECTRIC |
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Questions about this item
What contactor series does the LRD22L mount to directly?
The relay mounts directly to TeSys Deca contactors using its integral screw-clamp terminals.
Will the 17-24 A range protect a motor that runs at 22 A full-load current?
Yes, the adjustable dial covers 17 A to 24 A so a 22 A motor falls within the setting window.
How can I verify the overload relay trips correctly after wiring it?
Turn the adjustment dial to the motor's rated current, apply power, and confirm the 1NO/1NC auxiliary contacts change state when the thermal element reaches Trip Class 20 timing.
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