Interested to Buy Any Domain ? << Click Here >> for more details...
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
Which capacitor is preferred for high voltage and frequency?
what is power factor ? how we can calculate the low power factor and amount of capacitor for improve that low factor ?
Is it posible to instal one more SMDB from the existing SMDB and is it practical.
Give the topology of current amplifier with current shunt feedback?
HOW DO I CALCULATE THE SETTINGS FOR THE DIFFERENTIAL PROTECTION OF A 12kV/6.6kV, 6MVA,DYN11 XMER WITH PRIMARY SIDE CTR 400/1 AND SEC SIDE CTR 600/1?
What is phenomenon of electromagnetic induction and how it works?
If I have Energy Meter Ratio as 100:5 & Also I have CT Ratio as 50:5 then what will be my multiplying Factor(M.F.)
Installation resistance for whole installation of 16 kva & 25 KVA DTRA a) Between each conductor b) between conductor to earth c) installation resistance for each apparatus, each conductor to earth d) earth resistance for the system of earthing
how to setting Load amps tripping time and extra settings for load Transformer protection relay with RMU panel using C&S model relay..?
EXPLAIN THE TERMS "INTEREST AND DEPRECIATION" AS APPLIED TO ECONOMICS OF POWER GENERATION.
How to calculate no of EARTH PIT? Describe the formula as per IS standard?
who can measure the size of power cable?
What is The Resistance Formula
What are the operation carried out in thermal power station?
hello everybody. what does an abnormal stator winding impedance or dc resistance show? thanx
