The NT511 is a comby unit to control the temperature of MV dry type and cast resin transformers and the power of the fan cooling system.
In AD version it is equipped with Analog 4-20mA and Digital RS485 Modbus RTU outputs simultaneously.
It is recommended with the use of tangential fans, thanks to the presence of 6 outputs 230 Vac 1.5 A max. (each).
Every single fan is protected by a fuse and in case of failure the unit provides a FAULT signal.
The metal structure is designed for installation on the box of the transformers.
4 Pt100 inputs allow the reading of the temperature of the 3 windings and in case of the core or the ambient.
The unit is equipped with dry contacts to signal FAULT, ALARM and TRIP.
For the fans control there are 6 active outputs which provide power directly to the fans.
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).
POWER SUPPLY: 230 Vac
NT511 BASIC unit without any digital or analog outputs (COD. 1CN0010)
NT511 RS485 unit with digital RS485 Modbus RTU output (COD. 1CN0011)