Answer / 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.

Answer / a.mishra

CVT stands for CAPACITOR VOLTAGE TRANSFORMER and used for
measuring the voltage in sub-station......

why generator and t/f ratings given in kva?

2 Answers  

---

what are the specifications for Dc cables of higher rating

1 Answers   Reliance,

---

If u take a kWh reading in 11 kV HT and 440 LV side at same time in yesterday today , then why LT consumed units 3-4℅ high as compared to HT units

1 Answers   Brigade,

---

What is Transformer?

23 Answers   HSL,

---

A circuit breaker is a

9 Answers  

---

---

Why space heater is required for each verical bus bar chamber? if one space heater is adequate or not for anti condensation?

0 Answers  

---

Why is the neutral point of a star connected winding of a motor not grounded?

1 Answers  

---

What are the different methodes for calculating the short circuit Current?

0 Answers   Equate,

---

What is the formula to calculate a three phase alternator

0 Answers  

---

what is the purpose of using semiconductors in HT cables

3 Answers   Sterling,

---

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

0 Answers  

---

what will be the effect on the voltage .if power frequency is increasing or decreasing.

2 Answers  

---