TeSys LR47 electronic overcurrent relay, 6A/690V, with manual reset, to be supplied with 200-240V 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
- Overload: Imax > Isetting
- Sensitivity to Phase Failure: Locked Rotor, Mechanical Jamming I > 3 x Isetting
- [Us] Rated Supply Voltage: 200...240 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:
- Control type D-time: 0.5...30 s
- Control type O-time: 0.3...10 s
Local Signalling:
Control Type:
- Push-button: reset
- Electrical: reset
Connections - Terminals:
- Signalling circuit: screw clamp terminals 1 (1…2.5 mm²) - cable stiffness: flexible with cable end
- Signalling circuit: screw clamp terminals 1 (1…2.5 mm²) - cable stiffness: flexible without cable end
- Signalling circuit: screw clamp terminals 2 (1…2.5 mm²) - cable stiffness: flexible with cable end
- Signalling circuit: screw clamp terminals 2 (1…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)
- For Storage: -30…80 °C
Operating Altitude: Up to 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)