TeSys LRD14 thermal overload relay, 10A/690V, thermal setting range 7-10A, tripping class 10A, for protection of 3-phase motors 4kW@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. 
 
Main
range
TeSys
 
product name
TeSys LRD
 
product or component type
Differential thermal overload relay
 
device short name
LRD
 
relay application
Motor protection
 
product compatibility
LC1D09
LC1D12
LC1D38
LC1D32
LC1D25
LC1D18
 
network type
AC
DC
 
thermal overload class
Class 10A conforming to IEC 60947-4-1
 
thermal protection adjustment range
7…10 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
 
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
3 A at 120 V AC-15 for signalling circuit
0.22 A at 125 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
 
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: screw clamp terminals 1 cable(s) 1.5…10 mm² flexible without cable end
Power circuit: screw clamp terminals 1 cable(s) 1…4 mm² flexible with cable end
Power circuit: screw clamp terminals 1 cable(s) 1…6 mm² solid without cable end
 
tightening torque
Control circuit: 1.7 N.m - on screw clamp terminals
Power circuit: 1.7 N.m - on screw clamp terminals
 
height
66 mm
 
width
45 mm
 
depth
70 mm
 
net weight
0.124 kg
 
Environment
protective treatment
TH conforming to IEC 60068
 
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
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