what is the difference between CT and CVT in EHV Sub Stations
Answer Posted / p krishna teja
A current transformer (CT) is used for measurement of
electric currents.Current transformers are commonly used in
metering and protective relays in the electrical power
industry.
A capacitor voltage transformer (CVT), or capacitance
coupled voltage transformer (CCVT) is a transformer used in
power systems to step down extra high voltage signals and
provide a low voltage signal, for measurement or to operate
a protective relay. In its most basic form the device
consists of three parts: two capacitors across which the
transmission line signal is split, an inductive element to
tune the device to the line frequency, and a transformer to
isolate and further step down the voltage for the
instrumentation or protective relay.
Is This Answer Correct ? | 42 Yes | 2 No |
Post New Answer View All Answers
How to Calculate KA Rating of Main LT Panel
WHAT R THE SAFETIES IN A HIGH TENSION PANEL N LOW TENSION PANEL. ALSO WAT SAFETIES R THERE IN A 200 KVA TRANSFORMER?
Why we specify TNC switch with 1NO 1NC ,2NO 2NC ? how we get connection.?
What are the disadvantages of thermal power plant?
132/6.6ππ πππππππππππ πππππππ πππ πππ πππππ πππ πππππππππ. πΈ'ππ πππππππ πππππππππππ ππ 6.6ππ/415π πππ πΈ πππππππ πππππππ ππ ππππ πππππ πππ ππ ππ 13/6.ππ πππππππππππ?? πΈπ π½π.. ππππ π ππ’??
how do we calculate length of starting time and repeated starting of a direct online starter?
How to calculate Air conditioning capacity for a telecom BTS shelter?
Is there any question in the name of Static Switch in UPS??
This is urgent!! What is a Thyristor-based 3-ways selector switch with Zero crossing control? how does it operate and where is it mostly found in a system?
why we have to particulary use ACB for below ratings,even available of MCB,MCCB with that range ?
Q.1:What protection will be used on HT and LT side of 33/0.4 KV, MVA transformer. Indicate capacities of protective device to be used. Q.2:Which types of back-up protections are used in the power transformers? What do you understand by the term over travel in the relay? Q.3:How star and delta connected winding transformer are provided from earth fault
hello!my name is sheikh iam preparing for indian engineering servieces,please send me the old question papers..to sheikhshaazforjobs@gmail.com
explain why core loss of a transformer is almost constant under different load conditions when connected across a constant voltage and constant frequency.
Under wat condition statcom operates as an inductor for the transmission line?
explain PV modules in solar energy generation.