The NT133-3 is a complete and simple unit, for a sophisticated temperature control of HV and MV Oil power transformers.

With a single device you can control the oil temperature, you can drive the cooling system and you can calculate the thermal image of the 3 windings with exclusive algorithm.

The unit is equipped with 1 double Pt100 input for a redundant control and 3 universal inputs for current transformers (CT). Output relays are available for: ALARM, TRIP, FAN cooling system driving, oil circulation PUMP control and FAULT indication.

The unit is also equipped with Modbus RS485 output for remote control functions.

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

Electrical Connections

nt133-3 electrical connections tecsystem