The digital protection PGTN1 protects transformers for electric traction, in charge of feeding catenaries with 25 kV or 2 X 25 kV, 50 or 60 Hz voltages.

The PGTN1 also features functions that help network operation: assistance to the maintenance of the circuit breakers, disturbance recording.

The PGTN1 provides a minimum of impedance protection, which role is to backup the PDZIN1 main protection.

As well as the usual functions of protection, PDZIN1 relay provides monitoring, measurement and recording of the electrical quantities of the network.

The relays can be set locally, using either the keypad or the RS232 port, or remotely using the RS485 port.

The calculation of electrical values is achieved by Fast Fourier Transforms.

The setting, reading, measuring and recording are all available locally or remotely.