Areva MiCOM P921 - Page 54

P92x/EN TD/E11 Technical Guide
Technical Data
Page 8/30 MiCOM P921-P922-P923
2. BURDENS
2.1 Voltage circuits
Reference voltage (Vn)
Vn = 57 – 130V <0,25 VA
Vn = 220 – 480V <0,36 VA
2.2 Auxiliary supply
Nominal* Maximum**
3W
* Nominal is with 50% of the optos energised and one relay per card energised
2.3 Optically-isolated inputs
Reference voltage* Current (per logic input)
24-60Vdc 10mA
48-125 Vdc 5mA
130 – 250Vdc 2.5mA