TeSys LRK thermal overload relay, 11.5A/690V, thermal setting range 8-11.5A, 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 slide switch for simulation of a tripping, reset/stop button, 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 LC1K09-K16. Mounting on DIN rail, separated from the contactor, with use of a terminal block LA7K0064 (to be ordered separately). Multi standards certified (IEC, UL, CSA, CCC, EAC), Green Premium compliant (RoHs/Reach).
| Range | TeSys |
|---|---|
| Product name | TeSys LRK |
| product or component type | Differential thermal overload relay |
| Device short name | LR2K |
| relay application | Motor protection |
| Product compatibility | LC7K LP1K LC1K LP4K |
| Network type | DC AC |
| Thermal overload class | Class 10A conforming to IEC 60947-4-1 |
| Thermal protection adjustment range | 8…11.5 A |
| [Ui] rated insulation voltage | Power circuit: 690 V conforming to BS 4941 Power circuit: 690 V conforming to IEC 60947 Power circuit: 750 V conforming to VDE 0110 group C Power circuit: 600 V conforming to CSA C22.2 No 14 |
| Network frequency | <= 400 Hz |
|---|---|
| Mounting support | Under contactor Plate, with specific accessories Rail, with specific accessories |
| auxiliary contact composition | 1 NO + 1 NC |
| [Ith] conventional free air thermal current | 6 A for signalling circuit |
| [Ue] rated operational voltage | <= 690 V for power circuit 690 V AC AC-15 for signalling circuit 250 V DC DC-13 for signalling circuit |
| Associated fuse rating | 6 A gG for signalling circuit conforming to VDE 0660 6 A gG for signalling circuit conforming to IEC 60947 |
| [Uimp] rated impulse withstand voltage | 6 kV |
| Power dissipation per pole | 2 W |
| Phase failure sensitivity | Yes conforming to IEC 60947-4-1 |
| Local signalling | Trip indicator (yellow) |
| Control type | Red push-button: trip test function Blue push-button: stop and manual reset selector switch: manual or automatic reset |
| Connections – terminals | Screw clamp terminals 1 cable(s) 1.5…4 mm²solid Screw clamp terminals 2 cable(s) 1.5…4 mm²solid Screw clamp terminals 1 cable(s) 0.75…4 mm²flexible without cable end Screw clamp terminals 2 cable(s) 0.75…4 mm²flexible without cable end Screw clamp terminals 1 cable(s) 0.34…2.5 mm²flexible with cable end Screw clamp terminals 2 cable(s) 0.34…1.5 mm²flexible with cable end |
| Tightening torque | 1.3 N.m – on screw clamp terminals – with screwdriver Philips No 2 1.3 N.m – on screw clamp terminals – with screwdriver flat Ø 6 mm 1.3 N.m – on screw clamp terminals – with screwdriver pozidriv No 2 |
| Height | 58 mm |
| Width | 45 mm |
| Depth | 65 mm |
| net weight | 0.145 kg |
| Standards | IEC 60947 VDE 0660 BS 4941 NF C 63-650 |
|---|---|
| Product certifications | UL CSA UKCA |
| Protective treatment | TC conforming to IEC 60068 TC conforming to DIN 50016 |
| IP degree of protection | IP2X conforming to IEC 60529 |
| Ambient air temperature for operation | -20…55 °C without derating conforming to IEC 60947 -30…60 °C with derating conforming to IEC 60947 |
| ambient air temperature for storage | -40…70 °C |
| Operating altitude | 2000 m without derating |
| Fire resistance | 850 °C conforming to IEC 60695-2-1 |
| Flame retardance | V1 conforming to UL 94 Requirement 2 conforming to NF F 16-101 Requirement 2 conforming to NF F 16-102 |
| Mechanical robustness | Shocks NO contact: 10 Gn for 11 ms conforming to IEC 60068-2-27 Shocks NC contact: 10 Gn for 11 ms conforming to IEC 60068-2-27 Vibrations NO contact: 2 Gn, 5…300 Hz conforming to IEC 60068-2-6 Vibrations NC contact: 2 Gn, 5…300 Hz conforming to IEC 60068-2-6 |
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