Thermal overload relay, TeSys LRD, 12...18 A, class 10A

LRD21
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Description

TeSys LRD thermal overload relay, 18A/690V, thermal setting range 12-18A, tripping class 10A, for protection of 3-phase motors 7.5kW@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 LC1D18-D38. Mounting on DIN rail or screw fixing, separated from the contactor, with use of a terminal block LAD7B106 (to be ordered separately). Multi standards certified (IEC, UL, CSA, CCC, EAC, ATEX, Marine), Green Premium compliant (RoHs/Reach).



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Product Details

Activity PPCTR
Pincode Group default
Part Number LRD21
Weight 147.0 g
Package1 Length*Width*Height 8.8 cm x 7.8 cm x 5.0 cm
Country of Manufacturing France
[Ith] conventional free air thermal current 5 A for signalling circuit
[ue] Rated Operational Voltage 690 V AC 0...400 Hz for power circuit conforming to IEC 60947-4-1
[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
[Uimp] rated impulse withstand voltage 6 kV
ambient air temperature for operation -20-60 °C without derating conforming to IEC 60947-4-1
ambient air temperature for storage -60-70 °C
associated fuse rating 4 A gG for signalling circuit, 4 A BS for signalling circuit
auxiliary contact composition 1 NO + 1 NC
climatic withstand conforming to IACS E10
compatibility code LRD
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, 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
control type red push-button: stop, blue push-button: reset
depth 70 mm
device short name LRD
dielectric strength 1.89 kV at 50 Hz conforming to IEC 60947-1
flame retardance V1 conforming to UL 94
height 66 mm
IP degree of protection IP20 conforming to IEC 60529
mechanical robustness vibrations: 6 Gn conforming to IEC 60068-2-6, shocks: 15 Gn for 11 ms conforming to IEC 60068-2-7
mounting support plate, with specific accessories, rail, with specific accessories, under contactor
net weight 0.124 kg
network frequency 0...400 Hz
network type AC, DC
permissible current 1.5 A at 240 V AC-15 for signalling circuit, 0.1 A at 250 V DC-13 for signalling circuit
phase failure sensitivity tripping current 130 % of Ir on two phase, the last one at 0
product certifications IEC, UL, CSA, CCC, EAC, BV, RINA, DNV-GL, LROS (Lloyds register of shipping), ATEX INERIS, UKCA
product compatibility LC1D32, LC1D18, LC1D25, LC1D38
product or component type differential thermal overload relay
range TeSys, TeSys Deca
rated operational voltage limits 690 V AC 0...400 Hz for power circuit conforming to IEC 60947-4-1
relay application motor protection
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
temperature compensation -20-60 °C
thermal overload class class 10A conforming to IEC 60947-4-1
thermal protection adjustment range 12-18 A
tightening torque control circuit: 1.7 N.m - on screw clamp terminals, power circuit: 2.5 N.m - on screw clamp terminals
tripping threshold 1.14 +/- 0.06 Ir conforming to IEC 60947-4-1
width 45 mm
ambient air temperature for operation -20-60 °C without derating conforming to IEC 60947-4-1
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 compatibility LC1D32, LC1D18, LC1D25, LC1D38
mechanical robustness vibrations: 6 Gn conforming to IEC 60068-2-6, shocks: 15 Gn for 11 ms conforming to IEC 60068-2-7

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