what is the difference between capacitive voltage
transformer & inductive voltage transformer.
Answers were Sorted based on User's Feedback
Answer / lim
Inductive VT use conventional magnetic material for
coupling of HV and LV circuit. This method has problems due
to insulation of EHV circuit to the magnetic core(usually
at ground potential) and very expensive to produce as it
may need a few step down stages to achieve to final voltage
ratio, each stage shall be floated at gradually reduced
voltage relative to ground potential.
CVT is design to resolve this cost issue. The voltage is
first step down to relatively low level using capacitor
divider and connect to normal IVT for further reduction in
voltage to final value.
Is This Answer Correct ? | 31 Yes | 5 No |
Answer / sudipta
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. The device has at least four terminals: a terminal for connection to the high voltage signal, a ground terminal, and two secondary terminals which connect to the instrumentation or protective relay. CVTs are typically single-phase devices used for measuring voltages in excess of one hundred kilovolts where the use of wound primary voltage transformers would be uneconomical. In practice, capacitor C1 is often constructed as a stack of smaller capacitors connected in series. This provides a large voltage drop across C1 and a relatively small voltage drop across C2.
The CVT is also useful in communication systems. CVTs in combination with wave traps are used for filtering high frequency communication signals from power frequency. This forms a carrier communication network throughout the transmission network.
Is This Answer Correct ? | 10 Yes | 3 No |
Answer / parveen
in inductive t/f,voltage lead the current but capacitive
t/f, current lead the voltage.
Is This Answer Correct ? | 12 Yes | 22 No |
A 3-phase IM is supplied from 50 Hz system. It runs at speed of 1440 rpm and slip equal to 4 %. Calculate number of pole pairs. A 1 B 6 C 2 D 3
What Factors should we consider while synchronizing two DG Sets?
sir, 3phase induction motor takes different pf and different KW in three phase while running,explain reason
ult of expression 'document.FrmQF.myem
Why we use the D-curve MCBs in critical power distrubution.
What is difference between YNyn0 and YNyn ??
how you can select circuit breaker for 2000kva transformer?
What is the gross weight to copper ratio in slip ring induction motor of 4000 HP,6.6 kv, 372amp, 992 rpm GE motor.
what happen if we give 220 volts dc supply to d bulb r tube light?
For Eg a 30 kw motor at full load how much kw it takes And at no load how much KW it will take?
Plugging is a phenomenon to= A braking the motor B to accelerate the motor C to run IM as generator D to start the motor
WHAT IS THE MEANING OF 'UPF'&'LPF'.... HOW CAN WE DEFINE IT? WHAT IS THE VALUE/RANGE OF EARTH WIRE RESISTANCE USED PARTICULARLY IN HOME....