Terms & Conditions
Locations
TeSys LR47 electronic overcurrent relay, 60A/690V, with automatic reset, to be supplied with 200-240V AC, for protection of motors with a rated current 5-50A. It provides 3 dials to adjust the protection, LOAD (5-60A) for the overcurrent level, O-TIME (0.3-10sec) for the acceptable duration of the overcurrent, R-TIME (1-120sec) for the automatic reset delay. 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.
Products specifications
| Attribute name | Attribute value |
|---|---|
| Main | |
| Device short name | LT47 |
| Device application | protection |
| [Us] rated supply voltage | 200...240 V AC |
| [Ui] rated insulation voltage | power circuit: 690 V AC conforming to IEC 60947-4-1, power circuit: 600 V AC conforming to UL, power circuit: 600 V AC conforming to CSA |
| Range | TeSys |
| Product name | TeSys LT |
| Product or component type | electronic over current relay |
| Relay application | sensitivity to phase failure, locked rotor, mechanical jamming I > 3 x Isetting, overload Imax > Isetting |
| Thermal protection adjustment range | 5-60 A |
| Range of product | TeSys LT electronic over current relays |
| Complementary | |
| Depth | 77.2 mm |
| Width | 71 mm |
| Compatibility code | LT47 |
| Mounting support | rail |
| Control type | automatic: reset |
| Tightening torque | signalling circuit: 1.7 N.m M3.5 |
| Tripping threshold | 5...50 A |
| Local signalling | 1 LED (red), 1 LED (green) |
| Connections - terminals | signalling circuit: screw clamp terminals 2 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 1 1-2.5 mm² - cable stiffness: flexible without cable end, signalling circuit: screw clamp terminals 1 1-2.5 mm² - cable stiffness: flexible with cable end |
| [Uimp] rated impulse withstand voltage | 6 kV |
| Net weight | 0.192 kg |
| Associated fuse rating | 3 A BS for signalling circuit, 3 A gG for signalling circuit |
| Electromagnetic compatibility | conducted HF disturbances: 10 V conforming to IEC 61000-4-6, surge withstand: 6 kV conforming to IEC 61000-4-5, immunity to fast transients: 2 kV conforming to IEC 61000-4-4, immunity to electromagnetic interference: 10 V/m conforming to IEC 61000-4-3, conducted emission: class A conforming to EN 55011, resistance to electrostatic discharge: 6 kV in direct mode conforming to IEC 61000-4-2, resistance to electrostatic discharge: 8 kV in open air conforming to IEC 61000-4-2 |
| [Ith] conventional free air thermal current | 3 A for signalling circuit |
| Auxiliary contact composition | 1 NO + 1 NC |
| Height | 70.3 mm |
| Network frequency | 50...60 Hz |
| Time range | 0.3...30 s - control type O-time, 1...120 s - control type R-time |
| Environment | |
| Operating altitude | 2000 m |
| Protective treatment | TH conforming to IEC 60068 |
| Ambient air temperature for storage | -30-80 °C |
| IP degree of protection | IP20 conforming to VDE 0106, IP20 conforming to IEC 60529 |
| Dielectric strength | 2 kV at 50 Hz conforming to IEC 60255-5 |
| Ambient air temperature for operation | -25-60 °C without derating conforming to IEC 60947-4-1 |
| Standards | IEC 60947, IEC 60255-6 |
| Mechanical robustness | vibrations: 4 gn conforming to IEC 60068-2-6, shocks: 15 Gn for 11 ms conforming to IEC 60068-2-7 |
| Product certifications | CSA, UL |
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