SE-G1

Q: Why has the SE-G1 swiched off or why has the relay opened?



Q: Why has the SE-G1 switched off or why has the relay opened?

- Check if there is power to the unit according to specification.

If the power is ok:

- Turn off the power for 5 seconds and see if the relay is energized after power on again.


If not, turn off all the power to avoid risk of injury!

- Unmount one of the cables to the PTC element in the motor.

- If the measured resistance is above 11,4 kΩ ±5%, the temperature of the PTC-sensor is above the threshold limit and the relay has been released to protect the motor or installation.

- If the measured resistance is more than 1 MΩ, there is a broken connection to the PTC-sensor and relay will not engaged.

- If the measured resistance is close to 0 Ω, there is a short circuit on the PTC-sensor cable and there is no overheat protection!

- If all three phases are within range and resistance is below 2.9 kΩ ±5%, the protection module may be defect and needs replacement.