Answer Posted / zan
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 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 ? | 42 Yes | 2 No |
Post New Answer View All Answers
we are having 110 Kv,250mA Electrostatic precipitators for coal fired boilers. what will be static voltage and current after discharge and what time it will remain before earthing?
what do u understand from filter factor of reactor?
how to calculate the settings for shaft ct protn in hydro generators
checking procedure of capacitor based motors.used in fans etc?
why is the power generator connected as star earthed or star earthed through reactance and what its features ?
what is the circutor?why we use it ?
Explain mechanical rotational system?
if 2 coil of 1000W connect in series and 200 v is applied across it . then what is the total power of coil when coil have only resistive load .
As an electrical engineer what are the responsibilities which i can hold in TCS?
why industry prefer ht motor instead of lt motor.
why the neutral point in connnection oscillates?
How we can change the direction of rotation of Induction motor? Prove it using graphical
I use 20 nos led tube 4feet, in pathway 100mtr approximate, so what size cable i use for lighting
What is difference between Over Current & Earth Fault protection?
What will be advantage if we put some load in neutral of grounded star transformer & loadshortcircuit current,rated current of cable & MCB with example?