Electronic microcontroller based unit, specifically designed to control transformers with more than three windings, such as those used in the conversion DC/AC plants/systems; the NT539 can also be used to control the temperature of distribution MV/LV systems with three phases transformers.

It is equipped with 9 Pt100 inputs and the following relays: 3 for the ALARM, 3 for the TRIP and 3 for the FAN cooling system.

Furthermore, there’s another FAULT relay in common with the whole system, to signal a sensor fault or any other problem inside of the unit.

All our units can also be supplied with a special coating on the electronic cards, resistant to difficult weather conditions, particularly characterized by high temperature and humidity (which are in tropical climates).

UNIVERSAL POWER SUPPLY: with input from 24 to 240 Vac-dc

Parameter Name	Parameter Value
Display	digital
Protection level	IEC
Use	cooling for transformers
Other characteristics	universal
Maximum temperature (°C)	0 - 200