We've got some older Asea 33kV VTs sitting in storage that I'm considering installing. They're marked Class A E. Anyone got any ideas on what class this would translate to under the modern BS/IEC standards?
Thanks.
Thanks for the info on typical resistances Slavag. I agree that class PX is probably not really required with modern low impedance relays, but I thought that specifying a class PX could lead to a smaller and cheaper CT that still meets my requirements. With 1A CTs it appears that the CT...
For once we've got a project where I get to specify the CTs rather than just making do with whatever is already there.
The CTs will supply a low-impedance transformer diff relay and I want to specify class PX so that I can ask for a high enough knee point to avoid saturation as much as...
I've got a few 1960s/70s 33kV CBs with 15VA S10 CTs fitted. Can anyone tell me how what the 'S10' means?
I'm guessing that it refers to a standard in use prior to the introduction ofuse of BS/IEC P class.
