why we use REF and Differential Protection in one
transformers?my doubt is both protections are operated in
internal fault only.why we want to use 2 protections?please
clarify.
Answer Posted / gunasekaran
at internal earth fault condition diffrentional sensitive
only 85% only remaining 15% covered by REF protection
Is This Answer Correct ? | 1 Yes | 8 No |
Post New Answer View All Answers
how hydrogen cooled alternator undergo maintanence ? that is hydrogen when come in contact with air can result into explosions .
how to set the time in digital timer ?
What is the HVDC Transmission System? What are the conditions applicable to lay an HVDC Line?
What is state space method ? Why its used ? Can it applicable on linear, non-linear, 1st order, higher order, homogeneous, non-homogeneous, open-loop , closed loops , stable & unstable systems ?
why we use ac supply as 415 volts instead of 415 v why we cant apply 230 v for dc
# 4 hi friends i m from electrical branch and seeking for tech. + apti. both papers of hpcl plz get it available as soon as possible my email id is sumit_lig189@yahoo.co.in
Explain and give me an example of a time when you had to explain some new procedures to your co-workers for quality service delivery, how did you go about it?
i want to run 11kv star connected motor in 6.6kv with delta connected throught inverter, is it possible?
What is the tension required for the 25000 CFM AHU belt
Define thermal resistance in the context of power amplifier.
what do you mean by plant earthing system.
what is KA rating and how can we choose switchgears on applications
why all the feeders are designed in a particular manner ... is there any reason for that???
What is resolution of a measurement?
explain single phase series motor