Schneider Electric LRD340

Technical specifications

Manufacturer

Schneider Electric

Manufacturer part no.

LRD340

Type

Overload relay

Application

Motor overload protection

Used with

TeSys D (LC1D) contactors

Range

TeSys; TeSys Deca

Product name

TeSys LRD; TeSys Deca

Product or component type

Differential thermal overload relay

Device short name

LRD

Relay application

Motor protection

Product compatibility

LC1D65A; LC1D50A; LC1D40A

Network type

AC; DC

Thermal overload class

Class 10A conforming to IEC 60947-4-1

Thermal protection adjustment range

30…40 A

[Ui] rated insulation voltage

Power circuit: 600 V conforming to CSA; Power circuit: 600 V conforming to UL; Power circuit: 690 V conforming to IEC 60947-4-1

Network frequency

0...400 Hz

Mounting support

Plate, with specific accessories; Rail, with specific accessories; Under contactor

Tripping threshold

1.14 +/- 0.06 Ir conforming to IEC 60947-4-1

Auxiliary contact composition

1 NO + 1 NC

[Ith] conventional free air thermal current

5 A for signalling circuit

Permissible current

0.95 A at 380 V AC-15 for signalling circuit; 0.06 A at 440 V DC-13 for signalling circuit

[Ue] rated operational voltage

690 V AC 0...400 Hz for power circuit conforming to IEC 60947-4-1

Associated fuse rating

4 A gG for signalling circuit; 4 A BS for signalling circuit

[Uimp] rated impulse withstand voltage

6 kV

Phase failure sensitivity

Tripping current 130 % of Ir on two phase, the last one at 0

Control type

Red push-button: stop; Blue push-button: reset

Temperature compensation

-20…60 °C

Connections - terminals

Control circuit: screw clamp terminals 2 cable(s) 1…2.5 mm² flexible without cable end; Control circuit: screw clamp terminals 2 cable(s) 1…2.5 mm² flexible with cable end; Control circuit: screw clamp terminals 2 cable(s) 1…2.5 mm² solid without cable end; Power circuit: EverLink BTR screw connectors 1 cable(s) 1…35 mm² flexible without cable end; Power circuit: EverLink BTR screw connectors 1 cable(s) 1…35 mm² flexible with cable end; Power circuit: EverLink BTR screw connectors 1 cable(s) 1…35 mm² solid without cable end

Tightening torque

Control circuit: 1.7 N.m - on screw clamp terminals; Power circuit: 5 N.m - on EverLink BTR screw connectors

Height

70 mm

Technical documents (1)

• Schneider Electric product page LRD340

Key features

• Thermal protection adjustable from 30 to 40 A
• Class 10A to IEC 60947-4-1
• Phase failure sensitivity
• Stop and reset push-buttons
• Auxiliary contacts 1 NO + 1 NC

About the Schneider Electric LRD340

The Schneider Electric LRD340 is a differential thermal overload relay from the TeSys LRD range. Schneider Electric gives it a thermal protection setting range of 30…40 A, trip class 10A and 1 NO + 1 NC auxiliary contacts, and lists the LC1D40A, LC1D50A and LC1D65A contactors as compatible. Its product page shows it as a current product.

What is the LRD340 used for?

The LRD340 fits beneath a TeSys D contactor and trips the motor starter if the motor draws too much current for too long or loses a phase.

Lifecycle and successor

Active.

Before you order

What to photograph or confirm so the right unit is quoted.

Check the reference LRD340 on the relay's rating label, with its product version. Send us a photo of the label and we will confirm the details before quoting.