TeSys LRD overload relays are designed to be used with TeSys D contactors to make a motor starter. This overload relay can be used with 80 amp through 95 amp TeSys D contactors. These differential thermal overload relays detect over currents in the lines to the motor. When an overcurrent is detected the overload relay working with the contactor will disconnect the power to the motor. This will minimize the damage to the motor windings. This overload relay has an adjustable trip current rating of 37 to 50 amperes. This trip current rating is calibrated per Class 10A. Multi standards certified (IEC, UL, CSA, CCC, EAC, ATEX, Marine)
Range
TeSys
Product name
TeSys LRD
TeSys Deca
Product or Component Type
Differential thermal overload relay
Device short name
LRD
Relay application
Motor protection
Product Compatibility
LC1D95
LC1D80
Network type
DC
AC
Thermal overload class
Class 10A IEC 60947-4-1
Thermal protection adjustment range
37…50 A
[Ui] rated insulation voltage
Power circuit 1000 V IEC 60947-4-1
Power circuit 600 V CSA
Power circuit 600 V UL
Complementary
Network Frequency
0…400 Hz
Mounting support
Plate, with specific accessories
Rail, with specific accessories
Under contactor
Tripping threshold
1.14 +/- 0.06 Ir IEC 60947-4-1
Auxiliary contact composition
1 NO + 1 NC
[Ith] conventional free air thermal current
5 A signalling circuit
Permissible current
0.72 A 500 V AC-15 signalling circuit
0.06 A 440 V DC-13 signalling circuit
[Ue] rated operational voltage
1000 V AC 0…400 Hz power circuit 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 IEC 60947-1
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
-4…140 °F (-20…60 °C)
Connections – terminals
Power circuit screw clamp terminals 1 0.006…0.05 in² (4…35 mm²) flexible without cable end
Power circuit screw clamp terminals 1 0.006…0.05 in² (4…35 mm²) flexible with cable end
Power circuit screw clamp terminals 1 0.006…0.05 in² (4…35 mm²) solid without cable end
Control circuit screw clamp terminals 2 0.002…0.004 in² (1…2.5 mm²) flexible without cable end
Control circuit screw clamp terminals 2 0.002…0.004 in² (1…2.5 mm²) flexible with cable end
Control circuit screw clamp terminals 2 0.002…0.004 in² (1…2.5 mm²) solid without cable end
Tightening torque
Control circuit 15.05 lbf.in (1.7 N.m) screw clamp terminals
Power circuit 79.7 lbf.in (9 N.m) screw clamp terminals
Height
3.2 in (81 mm)
Width
2.8 in (70 mm)
Depth
4.5 in (115 mm)
Net Weight
1.12 lb(US) (0.51 kg)
Environment
Climatic withstand
IACS E10
IP degree of protection
IP20 conforming to IEC 60529
Ambient air temperature for operation
-4…140 °F (-20…60 °C) without derating IEC 60947-4-1
Ambient Air Temperature for Storage
-76…158 °F (-60…70 °C)
Flame retardance
V1 conforming to UL 94
Mechanical robustness
Vibrations6 Gn IEC 60068-2-6
Shocks15 Gn for 11 ms IEC 60068-2-7
Dielectric strength
2.2 kV 50 Hz 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
