Dear all,
The Areva P643 has 3 REF protection function. However, in the real world, would there be any transformer need 3 REF protection?
i normally see Yy0d11 transformer (which will need 2 REF protection function), but i never see Yyy transformer.
therefore, is it safe to say only 2 REF...
How about some household that actually direct take in 3 phase power from the utility? they have the 3 phase wiring in the house, which by theory they should split the 3 phase balance to household electrical appliance. however in real life, there must be some unbalance, in this case, all the...
Dear all,
i have been in Power industry for quite a few years, yet i still dont understand this simple basic theory. hope the expert here could enlighten me.
The power system is 3 phase 120deg balance. however, when it come to consumer side, it will be step down to 415Vac and distribute single...
Thank you DiscoP
the Omicron has the differential characteristic module, but it need you to buy that module before you can use it in their test.. :(
Thank you ProtectionEngineer
that's helpful.
by the way, what is the characteristic of HV external fault?
does that mean, the current at HV side...
well, i am working for quite a number of panels. answer as you wish.
1. Which biased differential relay you are testing (relay make and model)
Areva Micom P643
2. Threephase or singlephase testing?
3 Phase testing
3. 1A or 5A
1A
4. CTR's
Various configurations, so prefer if the software could...
dear all,
i am currently work on commissioning testing of transformer bias differential CRP. the client want to test a lot of test points, and scenarios, eg. heavy external fault.
anyone here have excel sheet or software (or recommend me software) could help me determine the value of secondary...
