Answer / naresh

In 400kV switchtard CVT is used for Voltage mesuring
(Protection & Metering purpose) and supply for wave trap.

wave trap is used for distence protection and communication
between sub stations.

For distence protection of line:
By using of wave trap triping time is less compare to relay
triping time.

Answer / venkatesh

cvt is used for mesurment purpose and wave trap is for
distance protection and also communication purpose.

Answer / amit bansod

In 400KV switch yard CVT and WAVE TRAP is used
Because CVT is use for menataing the 400KV voltage and also use for
Synchronising the,bus to line or feeder

Answer / k.prakashchandra

1. PLC communication and PLC aided trip 2. Line 'Live' and
'Dead' indications 3.Synchronization in certain cases 4. As
PT in emergency.

Answer / k.prakashchandra

P L C C, line 'Live' indication ,synchronization

Advantages/Disadvantages of earthing of neutral bus on MSB instead of separate neutral earthing for transformer/DG sets feeding to MSB

0 Answers  

Is it possible to measure the voltage of a battery from a single terminal?

0 Answers  

Why do u join toreent power ?

1 Answers  

WHAT IS THE USE OF EARTH SWITCHES?

3 Answers   L&T,

need to make a report. Need to choose a 3phase induction motor. Load conditions motor will operate in : Maximum Load: 30 Kw Speed: 2950 rpm Ambient temp: 20 cent Supply voltage: 440V Frequency: 50Hz need to look for the safety factor when choosing the motor, went through catalouge found a few, but dont know how to choose the safety factor allowing an extra load something above 30 KW to avoid any harm.

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which subject is better to tell when hr asks the area of interest?..

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how to choose the cable rating for load (KW)? EXAMPLE.50KW load

14 Answers   ACC, NCUI, Polycab, PowerSol, Siemens, SW,

What is Isolation Transformer???

4 Answers   Emerson,

we can use airconditioner for cooling the winding of transformer ,if not why?

3 Answers  

I have connected 04nos. earthings to a transformer through 04nos. earthing pits seperately. 02nos. earthings are connected to T/F body, and 02nos. earthings are connected to T/F neutral.T/F capacity is 2000KVA, 11KV/415V. But after completing of 02 years successful operation ,we are facing following problems- 1. CT/PT occured blast one time 2. HT cable box occured blast two times 3. One body earthing strip and one neutral earthing strip of transformer are overlapping at some places. Whenever these two strips are pressed at overlapped points, they made spark. What is the reason of spark? Please explain the reason & rectification of above problems

5 Answers  

Can anyone explain how the vector diagram of a transformer which doesn't have name plate be found whether it is Dy11/Dy5/Yd11 and so on?

4 Answers   TATA,

why transmission voltages are in multiple of 11kv?

10 Answers