EddyWirbelstrom
Electrical
- Feb 17, 2002
- 214
The new Australian Standard for CTs - AS 60044.1-2003 specifies the same parameters for the new class PX CT as the old class PL CT in AS 1675 where a typical protection CT for differential protection would be designated as :-
0.05 PL 500 R0.5 Where 0.05 = excitation amps at knee voltage of 500V, and the CT secondary d.c. resistance at 75 Deg C is 0.5 Ohm.
The new AS 60044.1- 2003 does not show how to designate this CT.
Can anyone tell me how this CT is to be designated to AS 60044.1 - 2003 ?
0.05 PL 500 R0.5 Where 0.05 = excitation amps at knee voltage of 500V, and the CT secondary d.c. resistance at 75 Deg C is 0.5 Ohm.
The new AS 60044.1- 2003 does not show how to designate this CT.
Can anyone tell me how this CT is to be designated to AS 60044.1 - 2003 ?