50Hz Instrument Transformers on 60Hz System
50Hz Instrument Transformers on 60Hz System
(OP)
Hello Guys,
I'm new here and I don't know yet if there are threads related to my question.
We ordered this Medium Voltage Switchgear (15kV) from Italy and we make sure that during the ordering process we specified a 60Hz System since we are here in the Philippines; Yesterday we found out that the instrument transformer (for metering and relaying) installed are all rated 50Hz. We already informed the manufacturer about that matter and at the same time we need also your advices.
Is it ok to use it?
Thanks a lot in advance.
ramski
I'm new here and I don't know yet if there are threads related to my question.
We ordered this Medium Voltage Switchgear (15kV) from Italy and we make sure that during the ordering process we specified a 60Hz System since we are here in the Philippines; Yesterday we found out that the instrument transformer (for metering and relaying) installed are all rated 50Hz. We already informed the manufacturer about that matter and at the same time we need also your advices.
Is it ok to use it?
Thanks a lot in advance.
ramski






RE: 50Hz Instrument Transformers on 60Hz System
Hopefully ScottF will give us a more detailed answer when he sees this thread.
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Sometimes I only open my mouth to swap feet...
RE: 50Hz Instrument Transformers on 60Hz System
respectfully
RE: 50Hz Instrument Transformers on 60Hz System
RE: 50Hz Instrument Transformers on 60Hz System
If you're using for revenue metering though, you may need to get them re-certified.
Regarding the comments above about heat, I can't see that being an issue. It would only be a possible concern for VTs and, unless you're loading the VTs up to the thermal burden rating (i.e. a powering application), they would not be running anywhere near their rated temp rise class. Should have no impact on their life or performance.
RE: 50Hz Instrument Transformers on 60Hz System
I just one to ask one more thing, Does it affect the Ratio (output) of the Instrument Transformers?
RE: 50Hz Instrument Transformers on 60Hz System
I would not expect it to be enough to be an issue.
Best regards,
Mark Empson
http://www.lmphotonics.com
RE: 50Hz Instrument Transformers on 60Hz System
No...there is no appreciable effect on the ratio, i.e. ratio error.