General Particulars |
11KV |
33 KV |
Highest System Voltage( H.S.V.) |
12 KV ( r.m.s.) |
36 KV (r.m.s.) |
Power frequency dry/ wet withstand voltage on primary winding for one minute |
28 KV ( r.m.s.) |
70 KV ( r.m.s.) |
Lightning Impulse withstand Voltage ( 1.2 x 50 μs ) |
75 KV ( r.m.s.) |
170 KV ( r.m.s.) |
PD measuring Voltage / Permissible Voltage |
7.6/50 |
23.0/50 |
Specific Particulars |
Rated Transformation Ratio |
As per customer requirement (in Amp.) |
Rated Primary Current |
Upto 2000 Amp. |
Rated Secondary Current |
1 Amp / 5 Amp / 0.577 Amp. |
Short Time Thermal Current (Ith) |
As per customer requirement.
In general CT is to be specified with STF of 100 for 1 Sec. or STC (lth) equal to the system fault level whichever is lower. KA ( r.m.s. ) |
Ith duration |
0.5 to 3.0 Second |
Short Time Dynamic Current |
2.5 X Ith KA (Peak) |
Number of Cores |
Upto 3 cores |
Output Burden |
Upto 60VA, 0.8 pf Lagging |
Accuracy Class |
For Metering :
0.2S, 0.2, 0.5S, 0.5, 1.0 & 3.0. For Protection:
5P, 10P, 15P & PS |
IAF, ALF, Knee Point Voltage, Exciting Current & Resistance |
As per customer requirement / Design Constraints |
Type of construction |
Epoxy Resin cast suitable for differnt panels. |