Main keywords and important concept point for this articles are transformer testing, what is current transformer, ct test, primary injection test.
Current transformer CT test procedure
This test is considered as one of the main test, it’s aimed to test:
- Current transformer ratio.
- Current transformer polarity.
- Burden of current transformer.
- Knee point of current transformer.
- Current transformer winding resistance.
- Magnetization curve of current transformer.
- Megger test (insulation test).
Required Equipment for Current Transformer
- Current transformer (CT) analyzer.
- Megger.
Mechanical check and visual inspection of current transformer
- Check tightness of all connection.
- Check ferrules.
Main keywords and important concept point for this articles are transformer testing, what is current transformer, ct test, primary injection test.
Current transformer analyzer connection
- CT analyzer has 4 leads, two should be connected to primary side which contains primary side of
CT and other two should be connected to secondary side of CT which you want to check its ratio. - After connecting CT analyzer through laptop and using CT analyzer software, test can be started
and result can be printed out for CT ratio, CT polarity, CT burden, CT knee point & CT winding
resistance. - This result should be compared with current transformer factory test and be sure that result within
acceptable tolerance. - To measure the burden: Inject 1 ampere on secondary side of CT, and using multi-meter you can
measure voltage calculate burden by multiply voltage and current and compare it with CT burden. - To test insulation: Using megger by 1 kilo volt injection for 1 minute, this test should be done.
between primary to secondary and secondary to secondary But for Primary to ground 5 kilo volt
injection for 1 minute. - See figure below which shows CT analyzer connection for CT TEST.
Main keywords and important concept point for this articles are transformer testing, what is current transformer, ct test, primary injection test.
Honestly, I suppose such posts must be printed and more because of the
present situation and contemporary needs of the Millenials.
I read them to get some new information that could correspond to your own requirements.