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HomeOperational DataValid CT/VT Ratios 

Valid CT/VT Ratios

 

This section allows you to view the valid Current Transformer (CT) and Voltage Transformer (VT) ratios.

An automated download of these ratios can be performed by accessing  https://downloads.elexonportal.co.uk/ctvt/xml

Please ensure that your systems only allow the use of the valid CT and VT Ratios set out in the lists below by 00:00 on the effective date shown.

Valid CT Ratios
Effective from:24/06/2021
10/5
100/1
100/5
1000/1
1000/5
1100/5
120/1
120/5
1200/1
1200/5
125/1
125/5
1250/1
1250/5
1400/5
15/5
150/1
150/5
1500/1
1500/5
160/5
1600/1
1600/5
180/5
20/5
200/1
200/5
2000/1
2000/5
2005/5
2400/1
2400/5
25/1
25/5
250/1
250/5
2500/1
2500/5
2600/5
30/5
300/1
300/5
3000/1
3000/5
3200/1
3200/5
350/1
350/5
3500/1
3500/5
3600/5
40/2
40/5
400/1
400/5
4000/1
4000/5
450/5
50/1
50/5
500/1
500/5
5000/1
5000/5
60/5
600/1
600/5
630/5
6500/5
700/1
75/5
750/1
750/5
80/5
800/1
800/5
900/5
UNKNWN
Valid VT Ratios
Effective from:24/06/2021
1000/110
1100/110
11000/100
11000/110
11100/110
132000/110
20000/110
2200/110
22000/110
24400/110
25000/110
26400/110
3300/110
33000/110
33000/63.5
5500/110
6100/110
6600/100
6600/110
66000/100
66000/110
UNKNOWN
Last updated: 08/02/2021 17:03:38