APC Schneider Electric LRD07 Thermal Overload Relay, 1.6 - 2.5 A, 690 V AC, 3P, TeSys LRD Series

Electric motors are the workhorses of industry, but they can be vulnerable to overloads and phase failures that lead to costly downtime and repairs. The APC Schneider Electric LRD07 thermal overload relay is engineered to protect your motors by interrupting the circuit when current exceeds safe levels, ensuring reliable operation and extending equipment life.

Who is it for

This relay is ideal for panel builders, maintenance technicians, and OEMs who need dependable motor protection in industrial control systems. It is particularly suited for applications using TeSys D contactors (LC1D09 to LC1D38) where space and performance are critical.

Main features

• Adjustable thermal protection range from 1.6 A to 2.5 A, allowing precise matching to motor full-load current.
• Phase failure sensitivity detects single-phasing conditions, preventing motor damage from unbalanced supply.
• Class 10A tripping characteristic ensures fast response to overloads while avoiding nuisance trips.
• Manual or automatic reset selectable on the front face for flexible operation.
• Compact 45 mm width saves space in control panels and fits directly under compatible contactors.
• 1 NO + 1 NC auxiliary contacts provide status feedback for control and signaling circuits.
• Screw clamp terminals accept a wide range of conductor sizes for secure, maintenance-free connections.

Specifications

• Product type: Thermal overload relay
• Series: TeSys LRD
• Thermal protection adjustment range: 1.6 - 2.5 A
• Rated operational voltage (Ue): 690 V AC
• Rated insulation voltage (Ui): 690 V AC
• Tripping class: Class 10A
• Number of poles: 3P
• Auxiliary contacts: 1 NO + 1 NC
• Mounting type: Direct under contactor / Plate / Rail
• Compatibility: TeSys D contactors (LC1D09-D38)
• Reset type: Manual / Automatic
• Operating temperature range: -20 to 60 °C
• Storage temperature range: -60 to 70 °C
• Degree of protection: IP20
• Standards: IEC 60947-4-1, UL 60947-4-1, CSA C22.2 No 60947-4-1
• Connection type: Screw clamp terminals
• Phase failure sensitivity: Yes

Tips

For optimal protection, set the thermal adjustment dial to the motor's full-load current as indicated on its nameplate. When using the automatic reset mode, ensure that the control circuit can safely handle automatic restarts after a trip. Always verify that the relay is mounted in a well-ventilated enclosure to maintain ambient temperature within the specified range.