TeSys LR47 electronic overcurrent relay, 6A/690V, with manual reset, to be supplied with 100-120V AC, for protection of motors with a rated current 0.5-5A. It provides 3 dials to adjust the protection, LOAD (0.5-6A) for the overcurrent level, O-TIME (0.3-10sec) for the acceptable duration of the overcurrent, D-TIME (0.5-30sec) for the starting duration. In addition, the device trips when there is a missing phase during more than O-TIME. The device has a reset button, a test/stop button, 2 LED indicators (Run/Trip), 2 auxiliary contacts 1NO+1NC for fault signalling. Settings can be locked by sealing the transparent cover. DIN rail mounting, without power terminals (currents monitored by 2 current transformers crossed by the motor cables). Multi standards certified (IEC, UL, CSA, CCC, EAC), it conforms to RoHS/REACh regulation.
Main
- Range: TeSys
- Product name: TeSys LT
- Product or component type: Electronic overcurrent relay
- Device short name: LT47
- Device application: Protection
- Relay application:
- Locked rotor
- Mechanical jamming (I > 3 x Isetting)
- Sensitivity to phase failure: Overload (Imax > Isetting)
- [Us] rated supply voltage: 100...120 V AC
- Thermal protection adjustment range: 0.5…6 A
- [Ui] rated insulation voltage:
- Power circuit: 600 V AC (conforming to CSA)
- Power circuit: 600 V AC (conforming to UL)
- Power circuit: 690 V AC (conforming to IEC 60947-4-1)
Complementary
- Network frequency: 50...60 Hz
- Mounting support: Rail
- Tripping threshold: 0.5...5 A
- Electromagnetic compatibility:
- Resistance to electrostatic discharge: 8 kV in open air (conforming to IEC 61000-4-2)
- Resistance to electrostatic discharge: 6 kV in direct mode (conforming to IEC 61000-4-2)
- Conducted emission: Class A (conforming to EN 55011)
- Immunity to electromagnetic interference: 10 V/m (conforming to IEC 61000-4-3)
- Immunity to fast transients: 2 kV (conforming to IEC 61000-4-4)
- Surge withstand: 6 kV (conforming to IEC 61000-4-5)
- Conducted HF disturbances: 10 V (conforming to IEC 61000-4-6)
- Auxiliary contact composition: 1 NO + 1 NC
- [Ith] conventional free air thermal current: 3 A for signalling circuit
- Associated fuse rating:
- 3 A gG for signalling circuit
- 3 A BS for signalling circuit
- [Uimp] rated impulse withstand voltage: 6 kV
- Time range:
- 0.5...30 s (control type D-time)
- 0.3...10 s (control type O-time)
- Local signalling:
- Control type: Push-button (reset), electrical (reset)
- Connections - terminals:
- Signalling circuit: Screw clamp terminals, 1...2.5 mm², cable stiffness: flexible with cable end
- Signalling circuit: Screw clamp terminals, 1...2.5 mm², cable stiffness: flexible without cable end
- Signalling circuit: Screw clamp terminals, 2...2.5 mm², cable stiffness: flexible with cable end
- Signalling circuit: Screw clamp terminals, 2...2.5 mm², cable stiffness: flexible without cable end
- Tightening torque: Signalling circuit - 1.7 N.m (M3.5)
- Height: 70.3 mm
- Width: 71 mm
- Depth: 77.2 mm
- Net weight: 0.192 kg
Environment:
- Standards:
- Product certifications:
- Protective treatment: TH (conforming to IEC 60068)
- IP degree of protection:
- IP20 (conforming to IEC 60529)
- IP20 (conforming to VDE 0106)
- Ambient air temperature for operation: -25…60 °C (without derating, conforming to IEC 60947-4-1)
- Ambient air temperature for storage: -30…80 °C
- Operating altitude: 2000 m
- Mechanical robustness:
- Shocks: 15 Gn for 11 ms (conforming to IEC 60068-2-7)
- Vibrations: 4 gn (conforming to IEC 60068-2-6)
- Dielectric strength: 2 kV at 50 Hz (conforming to IEC 60255-5)