What is the major difference between P.T. & C.V.T ? Why CVT
is used in HT Transmission line in place of P.T.?
- 13 Answers
- 111536 Views
- APGenco, OPTCL, I also Faced
- E-Mail Answers
Answer Posted / ahamad kutty k.v.
For voltages from 11 kV to 132kV electromagnetic voltage
transformers or P.Ts are used commonly.But above 132kV for
electromagnetic VTs/PTs the insulation is a problem and
uneconomical compared to CVTs .so for higher voltages CVTs
are used.Also for low voltages the Electromagnetic voltage
transformers are not bulky and hence are used directly to
step down to lower values,say 110V used for protection and
metering.
In the case of CVTs capacitors in series are used to drop
down the voltages( not stepping down) the voltage i.e.like
a voltage divider from higher voltages to a manageable
value that can be transformed using 11kV or 33kV
P.T.connected to the lower tapping of the capacitor of the
CVT. The lower part of the CVT you will find an
electrmagnetic transformer. That part is used to transform
say lower primary voltage to 110V. If 132kV or higher
voltages were to be transformed directly to 110V then
the voltage transformer or P.T will be so bulky
and costly. CVTs if connected with a wave trap and PLCC
equipments the same shall be used for carrie communications
also.
| Is This Answer Correct ? | 21 Yes | 3 No |
Post New Answer View All Answers
WHAT IS DOL STARTER? HOW IT WORK? GIVE ITS CONTROL AND POWER DIAGRAM .
54 Comments Alok and Bhanu play the following min-max game. Given the expression N = 38 + X*(Y – Z) where X, Y and Z are variables representing single digits (0 to 9), Alok would like to maximize N while Bhanu would like to minimize it. Towards this end, Alok chooses a single digit number and Bhanu substitutes this for a variable of her choice (X, Y or Z). Alok then chooses the next value and Bhanu, the variable to substitute the value. Finally Alok proposes the value for the remaining variable. Assuming both play to their optimal strategies, the value of N at the end of the game would be?
can anyone explain the star-delta motor control wiring ,which wire go where and how they operate?
How to convert a two phase power into a three phase power in induction machine?
what is sevice settings for mccb?How can be it setted?
Why hydropower is called renewable source of energy?
How the setting of the vector surge relay shall be calculated when the relay is to be used for Grid islanding application?
As an electrical engineer what are the responsibilities which i can hold in TCS?
Why control of DC motor is simpler?
Why Stabilising Resistor used in REF circuit ?
what is the diff. between x'mer , isolation x'mer & ultra-isolation x'mer ?????????????
which pump used in WTP explain the function of VFD how to dtermine capacitorbank of capacity one plant
what are the applications of PLC?
How to calculate multiplying factor of dc energy meter
3 shows a 415 V, 3-phase generator supplying a 3-phase 415/110 V transformer. Draw the individual and combined impedance diagrams to a base of 10 kVA. Determine the system fault kVA and the fault currents at the 415 V and 110 V busbars for short circuit faults on the transformer input or output terminals. Work in p.u. values of impedances.
