- OLD SERIES. ASK TO THYTRONIC CUSTOMER SUPPORT FOR AVAILABILITY -

The relay type SIG is intended for the protection of electric lines and machines against overloads, short circuits and earth faults.
The relay SIG features the following principal characteristics:

• three input measuring circuits for the line currents;
• measuring circuit, provided with a band pass filter, for the residual current;
• protection functions and final relays completely programmable by the user;
• selectable operation curves with independent or dependent time as well for the overcurrent as for the earth fault function;
• direct read-out of all the input quantities ;
• counting of the number of operations performed for each function;
• counting of the cumulative switched currents for each pole of the circuit breaker;
• storing the values of input quantities corresponding to the eight last operations (START or TRIP) and trace memory with pre and post-trigger (2.5 + 2.5s);
• two different setting configuration;
• blocking circuit, to perform accelerated protection schemes;
• digital input circuits;
• serial communication circuit RS485 with MODBUS© RTU protocol;
• trip circuit supervision (TCS);
• breaker failure protection (BF);
• programable disablement on lighting with programmable time setting;
• real time clock with memory backup;
• continuous monitoring of internal circuits.