LR2D3557 Schneider Electric Industrial Automation Components

Name: LR2D3557
Brand: Schneider Electric

Schneider Electric LR2D3557 Schneider Electric LR2D3557, part of the LR2D sub-range, is a differential thermal overload relay designed for direct connection to a contactor and features screw-clamp connections for both outgoing cables and the control circuit. This 3-pole device offers protection functions classified as Class 20, with a rated current range of 37-50 A. It includes protection settings for thermal overload within the same current range and is equipped with 1 Normally Open (NO) and 1 Normally Closed (NC) auxiliary contacts. The rated voltage for phase-to-phase operation, applicable across frequencies from 0 to 400Hz, is 690 V. The minimum operating current is set at 37 A, with a maximum threshold of 50 A.

Part#:LR2D3557

Manufacturer:Schneider Electric

Product Lifecycle:Active

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Schneider Electric LR2D3557, part of the LR2D sub-range, is a differential thermal overload relay designed for direct connection to a contactor and features screw-clamp connections for both outgoing cables and the control circuit. This 3-pole device offers protection functions classified as Class 20, with a rated current range of 37-50 A. It includes protection settings for thermal overload within the same current range and is equipped with 1 Normally Open (NO) and 1 Normally Closed (NC) auxiliary contacts. The rated voltage for phase-to-phase operation, applicable across frequencies from 0 to 400Hz, is 690 V. The minimum operating current is set at 37 A, with a maximum threshold of 50 A.

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Product Details

Connections - Terminals
Power circuit screw clamp terminals 1 0.01…0.05 in² (4…35 mm²) flexible without cable end Power circuit screw clamp terminals 1 0.01…0.05 in² (4…35 mm²) flexible with cable end Power circuit screw clamp terminals 1 0.01…0.05 in² (4…35 mm²) solid
Mounting Support
Plate, with specific accessories Rail, with specific accessories Under contactor
[Ui] Rated Insulation Voltage
Power circuit 600 V CSA Power circuit 600 V UL Power circuit 690 V IEC 60947-4-1
Product Compatibility
LC1D80 LC1D95
Network Type
DC AC
Associated Fuse Rating
4 A gG signalling circuit 4 A BS signalling circuit
Tightening Torque
Control circuit 15.05 lbf.in (1.7 N.m) screw clamp terminals Power circuit 79.66 lbf.in (9 N.m) screw clamp terminals
Permissible Current
0.72 A 500 V AC-15 signalling circuit 0.06 A 440 V DC-13 signalling circuit
Control Type
Red push-button stop Blue push-button reset
Net Weight
1.18 lb(US) (0.535 kg)
Depth
4.76 in (121 mm)
Width
2.95 in (75 mm)
Height
3.94 in (100 mm)
Temperature Compensation
-4…140 °F (-20…60 °C)
Phase Failure Sensitivity
Tripping current 130 % of Ir on two phase, the last one at 0
[Uimp] Rated Impulse Withstand Voltage
6 kV
Auxiliary Contact Composition
1 NO + 1 NC
[Ith] Conventional Free Air Thermal Current
5 A signalling circuit
[Ue] Rated Operational Voltage
1000 V AC 0...400 Hz power circuit IEC 60947-4-1
Tripping Threshold
1.14 +/- 0.06 Ir IEC 60947-4-1

Network Frequency

0...400 Hz

Relay Application

Motor protection

Thermal Protection Adjustment Range

37…50 A

Thermal Overload Class

Class 20 IEC 60947-4-1

Range

TeSys

Device Short Name

LR2D

Product Name

TeSys LRD

Product Or Component Type

Differential thermal overload relay

Product condition

ORIGINAL PACKAGING

SURPLUS ORIGINAL PACKAGING - 100% unused and in original packaging

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