P44x/EN TD/E33 Technical Data
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MiCOM P441/P442 & P444
2. BURDENS
2.1 Current Circuit
CT burden (at nominal current)
1A <0.04VA
5 A <0.4VA
2.2 Voltage Circuit
Reference voltage (Vn)
Vn = 100/120V <0.03VA
2.3 Auxiliary Supply
Case Size Nominal* Maximum**
Size 8 15VA dc 16W ac 20VA dc 20W ac
Size 12 18VA dc 19W ac 26VA dc 26W ac
* Nominal is with 50% of the optos energised and one relay per card energised
** Maximum is with all optos and all relays energised.
For each energised Opto powered from the Field Voltage or each energised Output Relay:
Each additional energised opto input 0.09W
(24/27, 30/34, 48/54V)
Each additional energised opto input 0.12W (110/125V)
Each additional energised opto input 0.19W (220/250V)
Each additional energised output relay 0.13W
2.4 Optically-Isolated Inputs
DC Supply 5mA burden per input. (Current drawn at rated voltage)
2.5mA at minimum voltage (30V)
Maximum input voltage 300V dc (any setting).
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