Monitoring of the transformer temperature

The transformer temperature is monitored by built-in temperature sensors.

These bimetal type sensors open or close when the temperature exceeds their setpoint threshold. If the transformer is equipped with several sensors having several thresholds, the "alarm temperature" sensor must be used.

NOTICE
Equipment damage Configure the device according to the type of sensor. Failure to follow these instructions can result in equipment damage.

Since the temperature sensors are installed on each column of the transformer, their wiring depends on the sensor type:

Wire the NO bimetal temperature sensors (which close when the temperature exceeds the threshold) in parallel
- Wiring of a single-phase transformer with two columns:
  If the transformer has three columns, wire the third temperature sensor in parallel with the other two sensors.
- Configure the device by selecting Menu > Settings > I/O config > Temp sensor > NO.
  
  NOTE: The default sensor configuration of the device is NO (normally open).
Wire the NC bimetal temperature sensors (which open when the temperature exceeds the threshold) in series
- Wiring of a single-phase transformer with two columns:
  If the transformer has three columns, wire the third temperature sensor in series with the other two sensors.
- Configure the device by selecting Menu > Settings > I/O config > Temp sensor > NC.

Pt••• type temperature sensors are not compatible with the device.

When overheating trips the bimetal sensor, a transformer alarm is generated on the HMI of the device, on the HRP, Transformer Overheat message is displayed on the Local Remote Display, sent via the Modbus communication and the transformer alarm relay is activated.