Answers were Sorted based on User's Feedback
Answer / iamdon
CT is used mainly for Instrumentation(Measurement and
protection system) purposes that is why it is also termed as
instrument transformer.The measuring and protecting devices
are not rated to sustain high currents.What a CT does is,
it lowers the current in secondary side so that measurement
as well protection can be done at a reduced level of
The digit in CT ratio of secondary side is IS standard for
rated secondary current so that uniformity among manufactures
The various values of secondary currents are
1)in the range of 0-5 amp e.g, 1A,5A
2)in the order of mA(particularly 40mA)in case of digital
devices for measurements and protection.
|Is This Answer Correct ?||7 Yes||2 No|
Answer / k.prakashchandra
With introduction of electronic protection and
metering ,nowadays 1A secondary CTs are employed.
|Is This Answer Correct ?||1 Yes||1 No|
What are the types of control system?
Why transformer is rated in kva?
Why do we use only Sinusoidal Wave in AC supply why not the Square,Triangle or Sawtooth etc?
This is reqd for a 1MW Solar power plant..We have 2DC outputs from the solar panels Connected to 2INVERTOR panels.. Output from invertor is 3ph,280v,500kva,50hz.These are connected to individual ACB.This has to be stepped up to 11KV ,1250KVA SYSTEM.Now can I use (1) one more ACBTO GIVE A COMBINED OUTPUT OF 1000KVA,280V & STEP UP THE OUTPUT BY USING a single two winding 3 ph transformer 11kv/1250kva. or (2)use the two outputs and connect to one three winding transformer of above rating..Pls suggestwith details.
difference between substation & grid substation?
Weather power factor correction needed for synchronous motors?
for any load, what happen if we use the cable rating above its normal rating
what sq.mm copper pvc wire need for ac load current 25amps for 230v ?
why we used servo motor insted of inducation motor?
what is difference between ac voltage and ac current
what is meant by impedance testing of transformer and why it is used
What should be the voltage between Neutral and Ground in secondary side of the step down transformer (230 V to 110 V) with no load condition?