LRD3506
Overload relay 37-50A Cls10 RTerm
Trade Price
£142.81
Per
1
Unit
EA
Pack Quantity
1
Information
TeSys LRD thermal overload relay, 50A/690V, thermal setting range 37-50A, tripping class 10A, 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 EverLink BTR screw terminals , it connects directly to the bottom terminals of 3-pole contactors LC1D40A-D80A. Mounting on DIN rail or screw fixing, separated from the contactor, with use of a terminal block LAD96560 (to be ordered separately). Multi standards certified (IEC, UL, CSA, CCC, EAC, Marine), Green Premium compliant (RoHs/Reach).
Technical Specifications
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
DC AC
Thermal overload class
Class 10A 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
0.95 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
Connection pitch
17.5 mm
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: lugs-ring terminals
Tightening torque
Control circuit: 1.7 N.m - on screw clamp terminals Power circuit: 6 N.m - on lugs-ring terminals M6
height
70 mm
Width
55 mm
Depth
123 mm
Net weight
0.375 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
Shocks: 15 Gn for 11 ms conforming to IEC 60068-2-7 Vibrations: 4 gn conforming to IEC 60068-2-6
Dielectric strength
1.89 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 GB/T 14048.4 GB/T 14048.5 EN 50495
product certifications
IEC UL CSA CCC EAC DNV-GL RMRS EU-RO MR LROS (Lloyds register of shipping) ATEX INERIS UKCA
Unit Type of Package 1
PCE
Number of Units in Package 1
1
Package 1 Height
6.0 cm
Package 1 Width
11.0 cm
Package 1 Length
14.0 cm
Package 1 Weight
366.0 g
Unit Type of Package 2
S02
Number of Units in Package 2
13
Package 2 Height
15 cm
Package 2 Width
30 cm
Package 2 Length
40 cm
Package 2 Weight
5.124 kg
Warranty
18 months
Document Links
Datasheet
Technical Data