TeSys LRK thermal overload relay, 1.2A/690V, thermal setting range 0.8-1.2A, tripping class 10A, for protection of 3-phase motors 0.25-0.37kW@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 LC1K06-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 | LC1K LC7K LP4K LP1K |
| Network type | AC DC |
| Thermal overload class | Class 10A IEC 60947-4-1 |
| Thermal protection adjustment range | 0.8…1.2 A |
| [Ui] rated insulation voltage | Power circuit 690 V BS 4941 Power circuit 690 V IEC 60947 Power circuit 750 V VDE 0110 group C Power circuit 600 V 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 signalling circuit |
| [Ue] rated operational voltage | <= 690 V power circuit 690 V AC AC-15 signalling circuit 250 V DC DC-13 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 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 0.00…0.01 in² (1.5…4 mm²)solid screw clamp terminals 2 0.00…0.01 in² (1.5…4 mm²)solid screw clamp terminals 1 0.00…0.01 in² (0.75…4 mm²)flexible without cable end screw clamp terminals 2 0.00…0.01 in² (0.75…4 mm²)flexible without cable end screw clamp terminals 1 0.00…0.00 in² (0.34…2.5 mm²)flexible with cable end screw clamp terminals 2 0.00…0.00 in² (0.34…1.5 mm²)flexible with cable end |
| Tightening torque | 11.51 lbf.in (1.3 N.m) screw clamp terminals Philips No 2 11.51 lbf.in (1.3 N.m) screw clamp terminals flat Ø 6 mm 11.51 lbf.in (1.3 N.m) screw clamp terminals pozidriv No 2 |
| Height | 2.28 in (58 mm) |
| Width | 1.77 in (45 mm) |
| Depth | 2.56 in (65 mm) |
| Net Weight | 0.32 lb(US) (0.145 kg) |
| Standards | NF C 63-650 IEC 60947 BS 4941 VDE 0660 |
|---|---|
| Product Certifications | UL CSA UKCA |
| Protective treatment | TC IEC 60068 TC DIN 50016 |
| IP degree of protection | IP2X conforming to IEC 60529 |
| Ambient air temperature for operation | -4…131 °F (-20…55 °C) without derating IEC 60947 -22…140 °F (-30…60 °C) with derating IEC 60947 |
| Ambient Air Temperature for Storage | -40…158 °F (-40…70 °C) |
| Operating altitude | 6561.68 ft (2000 m) without derating |
| Fire resistance | 1562 °F (850 °C) 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 contact10 Gn for 11 ms IEC 60068-2-27 Shocks NC contact10 Gn for 11 ms IEC 60068-2-27 Vibrations NO contact2 Gn, 5…300 Hz IEC 60068-2-6 Vibrations NC contact2 Gn, 5…300 Hz IEC 60068-2-6 |
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