LR2D3557
Overload 37 50A CL20 Scrw
Trade Price
£229.53
Per
1
Unit
EA
Pack Quantity
1
Information
TeSys LRD thermal overload relay, 50A/1000V, thermal setting range 37-50A, tripping class 20, for protection of 3-phase motors 22kW@400V. Differential device with phase failure and load unbalance detection. It provides a thermal adjustement dial, a manual-automatic reset selector, a test selector for simulation of a tripping, reset and stop buttons, a flag indicator and 2 auxiliary contacts 1NO+1NC for fault signalling. Settings are protected by a transparent cover lockable by sealing. Connection by screw clamp terminals , it connects directly to the bottom terminals of 3-pole contactors LC1D80-D95. Mounting on DIN rail or screw fixing, separated from the contactor, with use of a terminal block LA7D3064 (to be ordered separately). Multi standards certified (IEC, UL, CSA, CCC, EAC, Marine), Green Premium compliant (RoHs/Reach).
Technical Specifications
Range
TeSys
Product name
TeSys LRD TeSys Deca
Product or component type
Differential thermal overload relay
Device short name
LR2D
Relay application
Motor protection
Product compatibility
LC1D80 LC1D95
Network type
DC AC
Thermal overload class
Class 20 conforming to IEC 60947-4-1
Thermal protection adjustment range
37…50 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
0.72 A at 500 V AC-15 for signalling circuit 0.06 A at 440 V DC-13 for signalling circuit
[Ue] rated operational voltage
1000 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
Power circuit: screw clamp terminals 1 cable(s) 4…35 mm² flexible without cable end Power circuit: screw clamp terminals 1 cable(s) 4…35 mm² flexible with cable end Power circuit: screw clamp terminals 1 cable(s) 4…35 mm² solid without cable end 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
Tightening torque
Control circuit: 1.7 N.m - on screw clamp terminals Power circuit: 9 N.m - on screw clamp terminals
height
100 mm
Width
75 mm
Depth
121 mm
Net weight
0.535 kg
Climatic withstand
conforming to IACS E10
IP degree of protection
IP20 conforming to IEC 60529
Ambient air temperature for operation
-20…60 °C without derating conforming to IEC 60947-4-1
Ambient air temperature for storage
-60…70 °C
Flame retardance
V1 conforming to UL 94
Mechanical robustness
Vibrations: 6 Gn conforming to IEC 60068-2-6 Shocks: 15 Gn for 11 ms conforming to IEC 60068-2-7
Dielectric strength
2.2 kV at 50 Hz conforming to IEC 60947-1
standards
EN/IEC 60947-4-1 EN/IEC 60947-5-1 UL 60947-4-1 UL 60947-5-1 CSA C22.2 No 60947-4-1 CSA C22.2 No 60947-5-1
product certifications
IEC UL CSA EAC DNV-GL LROS (Lloyds register of shipping) UKCA
Unit Type of Package 1
PCE
Number of Units in Package 1
1
Package 1 Height
8.500 cm
Package 1 Width
7.800 cm
Package 1 Length
11.800 cm
Package 1 Weight
526.000 g
Unit Type of Package 2
S02
Number of Units in Package 2
12
Package 2 Height
15.000 cm
Package 2 Width
30.000 cm
Package 2 Length
40.000 cm
Package 2 Weight
6.615 kg
Warranty
18 months
Document Links
Datasheet
Technical Data