Answer / virendra joshi

Dear friend ,

Transformer is a heart of the electrical system & that is
the reason it required more care.

Daily :-

Check the Oil level in Conservator.
check for any leakage in transformer
Check for any abnormal sound
check for Colour of silica gel.
Check for any air in Bucholz realay , if found realease
with the air vent provided in the relay.

Yearly.

Check the Dielectrica strengh of oil , filter it & if
required replace it.

Check the earthing value of a Earthpit if required topup
with salt & water.

Check the tighness of the connection both the way Primaty
side & secondary side.

Clean the transformer yard throughly.

If required lay the granuals in the transformer yard.

By proper shut down manually check the tripping point of HT
breaker tripping set points like ( OT, WT & Bucholz Relay )

check the secondary side voltage as per desired voltage &
if any missallign found adjust with the tap changer.


please revert if any quarry exists.

Answer / tariq

in onload u cant do any test except temprature and sudden
pressur or oil level in conservator.oil leakage,cileco gel
colore for moisture,but in offload u can some more test
also.if u send ur question in detail may b i can help u

Answer / shivakumar.s

Which type of T/F ? Tell me first.

Answer / thyagarajan

checking of oil level in seal
reconditioning of silica gel
cleaning the bushing
check temp alarm
meger
check oil level in oltc, conservator

Answer / dr reddy's corporate offi

hai
1)take first permission from client & hod
2)switched off the brekers
3)rack out brekers applied loto kit
4)chek primary winding bushes & secondry winding bushes
5)chek silcazel colour(breather)
6)chek oil level & density of oil(resistance)
7)primary winding , secondary winding & core bolts retigtend
8)warnish apply winding
9)take break down votage test
10)chek oil teperature & winding temperaure guages functiong
11)chek oltc counter daily basis
12)trail tests taken buchloz realy

Why we transmit the power at the voltage in the multiple of 11 or 1.1 like 11kv, 22kv, 66kv, 132kv...... some one told me that it is due to fomr factor 1.1 of sine wave. its fine but while transforming we can choose any voltage, so why only multiple of 1.1 there also.......? plz tell me.

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