Integrated temperature sensor to ensure safe operation. Loose cables or bus-bars lead to increased contact resistance and therewith increased heat. The integrated temperature sensor indicates increased temperatures on the spot, ensuring a safe-operation.
Integrated voltage sensor allows direct measurement of voltage-drop at the main contact.
- Wires for the temperature sensor are connected to an NTC thermistor with a resistance of 10 kΩ (R25)
- Measurable temperature range is −55 …+155 °C
- NTC type: EPCOS B57551G1103+000 (RT No 8307). Tolerance = ±2%
- Voltage 1 and voltage 2 wires are connected to the main terminals via 1 MΩ resistors
- Tolerance < 1%