TeSys LRD3363 Thermal Overload Relay , 80A/1000V, thermal setting range 63-80A, tripping class 10A, for protection of 3-phase motors 37kW@400V. Differential device with phase failure and load unbalance detection. It provides a thermal adjustement dial, a manual-automatic reset selector acting also as reset button, a trip test button for simulation of a tripping, a stop button, a flag indicator and 2 auxiliary contacts 1NO+1NC for fault signalling. Settings are protected by a transparent cover lockable by sealing  
Range
TeSys
Product name
TeSys LRD
TeSys Deca
Product or component type
Differential thermal overload relay
Device short name
LRD
Relay application
Motor protection
Main
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
LC1D80
LC1D95
Network type
DC
AC
Thermal overload class
Class 10A conforming to IEC 60947-4-1
Thermal protection adjustment range
63…80 A
[Ui] rated insulation voltage
Power circuit: 1000 V conforming to IEC 60947-4-1
Power circuit: 600 V conforming to CSA
Power circuit: 600 V conforming to 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 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 conforming to 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
-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
81 mm
Width
70 mm
Depth
115 mm
Net weight
0.51 kg