Hello sir For self polarization the RCA angel is taken in clockwise direction from reference phasors & for cross polarization the RCA angel is taken in anticlockwise direction from reference phasors. Is it correct sir ??
How do I test the digital protection relay in the field? 1. After inputting the formal parameters, do you want to test each protection function? 2. After testing with temporary parameters, do I need to test with formal parameters again? 3. After changing the parameter settings, how to ensure that the input is correct? Is it re-testing or visual inspection on the equipment?
1. After input to formal parameter testing of all function will be good 2. once if you tested with temporary setting itself okay but for 100% conformation you need to go for testing again once you have your formal parameters.
Merci pour votre excellent explication simple et non compliquée
welcome
Thank u barani ji
WELCOME
l have a question in Cross polarization.If the operating current leads the polarizing voltage ,are we not supposed to use negative on RCA settings?
need to use reverse direction settings
Sir, how we know which one polarization method used in p141 relay for o/c and E/F relay?
ITS CROSS POLARIZATION . THIS WE CAN CHECK IN RELAY MANUAL.
Hello sir
For self polarization the RCA angel is taken in clockwise direction from reference phasors & for cross polarization the RCA angel is taken in anticlockwise direction from reference phasors. Is it correct sir ??
Yes, correct
why it is taken like this sir?
Excellent explanation
thank you
Sir please explain about negative sequence polarization for earth fault protection in transmission line & how to calculate its operating region
sure
How do I test the digital protection relay in the field?
1. After inputting the formal parameters, do you want to test each protection function?
2. After testing with temporary parameters, do I need to test with formal parameters again?
3. After changing the parameter settings, how to ensure that the input is correct? Is it re-testing or visual inspection on the equipment?
1. After input to formal parameter testing of all function will be good
2. once if you tested with temporary setting itself okay but for 100% conformation you need to go for testing again once you have your formal parameters.
What is the suitable RCA for DGR Relay ??
i don't know
How to check REF615 relay phasor diagram/vector sum of current
triggering on DR and possible to check
Thank you.
Why some relays use torque angle or MTA for oc 45 lag and ef 15 lead(make avana npa141), but some relays oc 45 lead and ef 15 lag(make erl MIT121-131)
each relay has its own programing code and finding method.
Shabash
your most welcome
Thank you sir
most welcome
If RCA is negative then how we should take
we have to take Vref should be opposite
It phase between 90 angle
phase between 90 angle ?
@@baranitech1026 it the phase angle beetween A-B B-C C-A
@@chatmongkhonratchawong6045 yes