The thermistor relay is used as protection relay for motors against thermal overload (inadmissible heating). This heating might be caused by mechanical overload on the shaft or when operating the motor with inadmissible voltages. A PTC thermistor is used as sensor. It should be mounted to the part of the motor that heats most in case of overload (e.g. integrated in motor winding). The device can also be used for motors with integrated thermo switch.
- Variant:
- 230 V AC
- 2 changeover contacts (DPST)
Resources
| TMR-E12 without error memory, 230 V AC, 2 changeover contacts | 1103150522 | View DataSheet |
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Specifications
General Data | Operating voltage AC | 230 V AC |
| Start-up delay | 100 ms |
| Input / thermistor voltage | 12 V |
| Input / thermistor current | 1 mA |
| Input / switch-on resistance | 1.8 kOhm |
| Input / switch-off resistance | 3.0 kOhm, +/- 5% |
| Output / contact | 2 (DPST) changeover contacts |
| Output / switching voltage | 250 V |
| Output / continuous current | 4 A |
| Mechanical endurance | 1 x 107 |
| Electrical endurance | 1 x 105 |
| Switching frequency | 1200 cycles/h |
| Display | Green and red LED |
| Dimensions (W x H x D) | 22.5 x 75 x 95 mm |
| Weight | 150 g |
| Operating temperature range | 0 °C to 55 °C |
| Storage temperature range | -20 °C to 70 °C |
| Ingress protection for housing / terminal block | IP40 / IP20 |
