SL. |
Particulars |
|
11 KV |
22 KV |
33 KV |
66 KV |
132 KV |
1 |
Highest System Voltage |
kV |
12 |
24 |
36 |
72.5 |
145 |
2 |
Power Freq dry/wet withstand voltage |
KVp
rms |
28 |
50 |
70 |
140 |
275 |
3 |
Lightning Impulse Voltage
1.2/50 µs |
kVp |
75 kV |
125 |
170 |
325 |
650 |
4 |
Transformation ratio |
Amp |
Ratio in multiples upto 5000 |
5 |
Rated Primary Current |
Amp |
Upto 5000 |
6 |
Rated Secondary Current |
Amp |
0.577,1.0,5.0 |
7 |
Short Time Current Rating |
KA |
25KA for 1 sec |
25 KA for 1 or 3 sec |
25 KA for 1 or 3 sec |
40 KA for 1 or 3 sec |
40 KA for 1 or 3 sec |
8 |
No of cores |
no |
Upto 5 core |
9 |
Out put Burden |
VA |
Upto 60 VA at 0.8 pf lag |
10 |
Accuracy class |
- |
|
|
Metering |
- |
0.2, 0.2s, 0.5, 0.5s, 1.0, 3.0 & 5.0 |
|
Protection |
- |
5P, 10P, PS, 5PR, 10PR |
11 |
Instrument Security Factor (I.S.F/FS) for Metering Core |
|
5 or 10 , FS10 is sufficient for modern meters |
12. |
Accuracy Limit Factor (ALF) for Protection Core only |
|
10 , 15, 20. |
11 |
Creepage Distance |
mm/ KV |
≥ 25 ( Longer on request) |
|