Answer / ajay

for H.V side u can use R.M.U whc include SF6 C.B and For LT
side ACB

Answer / nirajan poudel

11000/440v means it is step-down transformer.so, for MV
side use 9kv LA,11 kvDO-FUSE and switch gear panel which
includes VCB which is used for isolating the transformer
during maintenance period.For LV side use TP MCCB for 3-
phase bus bar(R,Y,B) and use SP MCCB for 1-phase bus
bar.And there must be provision for AMF (Automatic Main
Failure Panel) to change the supply from main line to stand-
by generator and vice-versa with respective CB tripped.

Answer / ajay pal

transformer are to be fully earthed ,neutral grounding
resistor are to be provided, transformer overhead
differential protection , transformer oil for cooling is
very necessary ,

Answer / doli tomar

11000/440v means it is step-down transformer.so, for MV
side use 9kv LA,11 kvDO-FUSE and switch gear panel which
includes VCB which is used for isolating the transformer
during maintenance period.For LV side use 4P ACB /MCCB for
3-
phase bus bar(R,Y,B) and use overcurrent, overvoltage,
undervoltage,IDMT,Single phase preventer,restricted earth
fault relay because Relays are used where it is necessary
to control a circuit by a low-power signal (with complete
electrical isolation between control and controlled
circuits), or where several circuits must be controlled by
one signal.

Answer / rakesh

Transformer Secondary star neutral need to be earthed.
Separate earthing pit need to be provided.

what is the difference between STAR and DELTA connection and application wise how it can be utilizedd ???

1 Answers  

What is the use of core in the transformer?

19 Answers  

Since phi is the angular displacement between V & I, then why we use phi in power triangle ie. when showing active, reactive & apperent power in triangular manner & if it is ok then where is V & I in the triangle.

1 Answers  

What is the differemce between Pulse transformer and Welding transformer.

1 Answers   BARC,

What is meant by Im=30mA@Vk/2. How to know the kee point voltage for CT design

0 Answers  

what is voltage present between to phases in a three phase motor?

1 Answers  

can we use heat gun instead of gas torch in 11kv termination kit. I mean can both sources provide enough amount of heat to ensure the uniform shrinkage of sleeve.

1 Answers  

why are the a.c.series motors preferred for electric traction

4 Answers  

Why red,yellow,green colours lamps are used in the traffic control?

2 Answers   Samtel,

How I calculate the ELCB for circuit breakers?

0 Answers  

Can I use 1 phase power supply to run 3 phase motor? If yes, how?

6 Answers   Enercon,

Why Transistors are not used as switching devices?

15 Answers