what is the workimg of ct &pt?
Answers were Sorted based on User's Feedback
Answer / a.ramachandran
current transformer : transformation of high current into
required current rating of measuring instruments and
protection relays.
Potential transformer: step down the high voltage into low
voltage for the purpose of measuring instruments and
protection relays.
Is This Answer Correct ? | 12 Yes | 1 No |
Answer / pragati kumar
Current Transformer(ct) is used to measure current in high
voltage ac circuit because it is not possible to measure
high voltage ac current with ammeter alone.Potential
Transformer(pt) is used to measure high ac voltage.
Is This Answer Correct ? | 6 Yes | 5 No |
Answer / wasif arshad
Basically both CT and PT steps down the voltage but the difference is that in CT primary is not winded on the core and both the terminals of secondary are connected to ampere meter of appropriate transformation ratio while in pt both primary and secondary are wounded on the core like a simple step down transformer and both terminals of primary are connected to the high voltage and secondary to the voltmeter to give deflection according to scale of voltmeter having the same transformation ratio shown on PT.
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / sanjay kumar
current transformer(ct)works to reduce the current for
measuring equipment or protection relay bcoz ct works as a
step up transformer.
potential transformer(pt)works to the voltage for measuring
equipment or protection relay bcoz pt works as astep down
transformer.
Is This Answer Correct ? | 5 Yes | 7 No |
Has someone here done a sizing for a generator (3 phase), its for a pumping station. If you have an example for standby/duty and both running (I) star delta (ii) Soft Starter.
How can we calculate the rating of a transformer suppose if load is 1000KW?Formula?
What will be the change in its efficiency and other parameters of a ONAN transformer if it changed to ONAF transformer ?
What is neutral earth voltage of transformer and what should be the value
What is a copper loss or i2r loss pc?
how is the leakage current flow only through guard wire (when guard wire is connected in the circuit)????
why transformer is giving some humming noise .....?
Can anyone explain me about the RLC based Impulse high voltage generator and how to and operation of Series resonant High voltage reactor...?
1.why should we connect the measuring instruments in l.v side in short circuit test of a transformer? 2.why the power factor is less in open circuit test of a transformer?
what transformer we used normally and upto which kva?
what is meant by MCB and MCCB? and what its full form?
how much current does 3ph a.c & d.c motor drawn.Plz. provide formula with example.