Answer / n.ramkumar

The Principle Parts of a Transformer and their functions
are:
# The Core which makes a path for the magnetic flux.
# The Primary coil,which receives energy from the ac source.
# The Secondary coil,which receives energy from the
primary winding and delivers it to the load.
# The enclosure,which protects the transformer from
dirt,moisture,and mechanical demage.
# Purpose of Oil Conservator:
1.To protect the warm oil against contact with the oxygen
in the atmosphere and thus prevent deterioration of the oil.
2.To contain the changes in oil volume which occur during
thermal cycling.
3.To prevent the entry of air and hence also the
condensation of water on the inside of the transformer tank.

Answer / muhammadtahir

Transformer Parts and their Functions

• CONSERVATOR
Conservator is a cylindrical tank, situated at upper portion of power transformer and is connected to transformer tank through pipe. It provides adequate space for expansion of oil whenever transformer internal temperature rises or ambient temperature changes. It also facilitate for filling of oil in transformer’s tank.

• MAIN TANK
This part of transformer contains the assembly of core and both primary and secondary windings immersed in insulating oil.
• RADIATORS
These are tube like structures, connected with transformer tank and provides circulating path for transformer oil for cooling purpose.
• BUCHHOLZ RELAY
It is a very sensitive gas and oil operated instrument which is used to protect transformer windings, safely detect the formation of gas or sudden pressure inside the oil transformer. This is a double ended device one end is connected to conservator other is connected to tank. There are two float switches inside the relay one is connected to alarm circuit for warning and other is connected to trip circuit to protect transformer against damage.
• BREATHER
Breather is a device which contains a chemical material (Silica Gel) and is used for air take in/out of the sealed transformer
• SILICA JEL
Silica Gel Blue semi-transparent glassy substance containing an indicator as “Cobalt Chloride” a heavy metal salt. When free from moisture the Granules or beads are dark blue in color. As the beads takes up moisture, they turns to light blue gradually & finally turn to pink.
• OIL LEVEL SCALE
This part is situated on the side of conservator tank for verification of specific oil level at specific temperature.
• PRIMARY WINDING
Copper wound coils places of the limbs of core, used as primary winding (circuit) to transmit power to secondary winding via magnetic circuit. No of turns of coils depends upon the rating of transformer.
• TAP-CHANGER
A tap changer is a connection point selection mechanism mounted on transformer main tank at HT winding that allows a variable number of turns to be selected in various steps. A transformer with a variable turns ratio is produced, enabling stepped voltage regulation of the output. The tap selection may be made via an automatic or manual tap changer mechanism.
SECONDARY WINDING
Copper wound coils used as secondary winding (circuit) to transmit power to Loads. No of turns of coils depends upon the rating of transformer. Primary and secondary windings are electrically isolated from each other but magnetically coupled via iron core.
• IRON CORE
The primary and secondary windings are wrapped around a core (made by thin, soft laminated layers of steel). The purpose of the iron core is to provide low reluctance path to the magnetic flux generated by primary winding, to link with the secondary winding for induction.
• PRESSURE RELIEF PIPE or EXPLOSION VENT
To avoid Critical situation due to extreme pressure developed in transformer tank, a pipe is mounted on transformer tank called pressure relief pipe, containing bursting plate breaking device which burst to discharge the pressure and protect transformer.
• DRAIN VALVE
This valve is situated under the oil tank and is used for taking out transformer oil. (For purpose of dehydration and purification, transformer maintenance or replacing with new oil etc).
• HT/ BUSHINGS
Porcelain insulated device that allows the connection terminals of primary and secondary winding to pass safely through the (earthed conducting) tank for connection purpose. Bushings prevent unwanted leakage of electricity.

Answer / a.soumya

1)Core
2)Primary,secondary windings
3)Transformer tank
4)Conservator
5)Bushings
6)Breather
7)Radiators
8)Winding loads(input)
9)Winding loads(output)
10)transformer oil
11)Buckholtz relay

Answer / nilesh murani

There is no any information found about OSR( oil searge relay)  is the mistly protective device in transformer. Any type of heavy spark occurd inside of transformer. And high vibration of oil cause this device will operate and it tripped breaker and it save transformer

Answer / biswajit mohapatra

Part's of transformer - 1 - core 2 - primary winding 3 - Secondary winding 4- Conservator 5 - Buchholz relay 6 - oil level indicator 7 - Breather 8 - Selica jel 9 - Main tank 10 - Transformer oil 11 - Explosion Valve 12 - Diaphragm 13 - HT terminal 14 - LT terminal 15 - Tap changer 16 - Radiator/ cooling tubes 17 - oil outlet 18 - Earth
Function : 1 - Conservator - It maintain spece when oil is overheat nd explore or it mainly used to store extra insulation oil.. 2 - Buchholz relay - It is a protective device of transformer. It protects transformer when overload or over heat.....3 - Oil level indicator - It maintain oil level in transformer , when oil is low it indicates...4 - Breather - it protects transformer from moisture nd any harm full particle in air.....5 - Selica jel - It situated in Breather..It absorbs moisture nd any harm full particle in air.In Good stage colour of Selica jel is Blue ...After absorb moisture it's colour is lite pink....6 - Main tank - Main tank contain transformer core nd oil.....7 - Transformer oil - It helps the insulation between core nd tank.....Alkaline is used as transformer oil....8 - Explosion Valve - when Transformer is overload or over heat then Explosion Valve will open... 9 - Diaphragm - when Transformer is overload or overheat then Diaphragm will brust. 10 - HT terminal - It's meaning High tainsion ...High voltage will give this terminal.....11 - LT terminal - It's meaning low tainsion..Low voltage will induce this terminal....12 - Radiator - It helps to cooling the transformer oil....Many cooling pipe is connected for cooling the transformer oil...13 - Oil outlet - It helps to drain the damage oil in the transformer.....14 - Earth - It protects transformer when leakage current flow nd any short-circuit in transformer.....

Answer / lakkanna

OIL LEVEL SCALE

Answer / n.ramkumar

Buchholz relay:The Buchholz relay is installed in the
connection pipe between boiler and expansion vessel of
transformer.when in normal operation,the relay is
completely filled with insulating liquid.due to
buoyancy,floats are in their uppermost positions.if
troubles occur inside the transformer,the buchholz relay
responds as follows:
Trouble:Local overheating provokes gradual decomposition of
liquid and solid insulation material plus formation of gas.
Reaction:Gases move to the top,accumulate in the Buchholz
relay and displace the insulation liquid.the liquid level
falls and upper float comes down as well.The permanent
magnet coupled to this float slides along a magnet contact
tube.A contact is operated by the permanent magnet as soon
as the float reaches its response position.A warning signal
is released.Design of the Buchholz relay is such that only
a certain gas volume can be received.

Answer / praju

BOBBIN ALSO A PART OF TRANSFORMER.IT IS USED HAS A
PERMANENT CONTAINER FOR THE WIRE( WINDINGS)

Answer / gakpo divine

Why neutral is used in three phase motor connection?

Answer / solanki dharmesh

1) Main Tank
2) Bushings
3) Terminal boxes
4) Tap changer
5) Conserveter Tank
6) Breather
7) Buchholz Relay
8) Radiaters
9) Bus Ducts
10) Marshaling box
11) Explosin vent
12) Pressure Release Valve (PRV)

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