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. Integrated fault memory with reset key at the front.
- Variant:
- 230 V AC
- 1 changeover contact (DPST)
Resources
| TMR-E12 with error memory, 230 V AC, 1 changeover contact | 11031605 | View DataSheet |
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Specifications
General Data | Operating voltage AC | 230 V AC |
| Start-up delay | 10 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 | 1 (SPDT) changeover contact |
| 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 |
