LR9D32

What does this overload relay do?

This device is an electronic thermal overload relay designed to protect motors from overload conditions. It monitors motor current and helps disconnect the circuit when the load exceeds the set value for too long, reducing the risk of motor damage in three-phase applications.

What current range can it be adjusted to?

It has an adjustable thermal protection range from 6.4 A to 32 A, allowing it to be set to match the motor full-load current within that band.

Is it suitable for three-phase motor protection?

Yes. It is a 3-pole electronic thermal overload relay intended for motor protection in three-phase systems.

Which contactors is it commonly used with?

It is designed for use with selected Schneider TeSys D contactors, including LC1D09, LC1D12, LC1D18, LC1D25, LC1D32 and LC1D38.

Can the trip class be adjusted?

Yes. The relay offers adjustable thermal overload trip classes from Class 5 to Class 30, which can help match protection behaviour to the motor starting characteristics and application demands.

Does it offer phase failure sensitivity?

Yes. It includes phase failure sensitivity, with response to a phase difference greater than 40% within 3 seconds, in line with IEC 60947-4-1.

What reset options are available?

This model supports both manual and automatic reset functions. The control layout includes a red push-button for stop and manual reset, plus a red knob for automatic reset selection.

How can it be mounted?

It can be mounted directly under a compatible contactor, or fitted to a plate or rail when used with the appropriate accessories.

What are the electrical ratings?

The relay has a rated operational voltage of 690 V for the power circuit and 660 V for the signalling circuit. Its rated insulation voltage is 1000 V for the power circuit and 690 V for the signalling circuit, with a 6 kV impulse withstand rating.

What terminal sizes does it accept?

For the control circuit, it uses screw clamp terminals for one cable up to 2.5 mm². For the power circuit, it uses screw clamp terminals for one cable up to 16 mm², with solid or flexible conductors and without cable end.

What tightening torque should be used?

The recommended tightening torque is 0.8 N·m for the control circuit terminals and 3.1 N·m for the power circuit terminals.

What are the dimensions and weight?

The Schneider LR9D32 measures approximately 72.5 mm high, 45 mm wide and 79.9 mm deep, with a net weight of about 0.18 kg.

What environmental conditions is it designed for?

It is rated for operation from -25°C to 70°C and for storage from -55°C to 80°C. The relay can be used at altitudes up to 2000 m without derating.

What level of protection does the enclosure provide?

The front face is rated IP20, which is suitable for installation inside an appropriate electrical enclosure.

Does it meet recognised standards and approvals?

Yes. This overload relay is listed against major industrial standards including EN/IEC 60947-4-1 and EN/IEC 60947-5-1, and it also carries approvals such as UL, CSA, CCC and IECEE CB Scheme depending on the market version.