Answer / sewagudde

tx protection includes:
buccholz relay
oil and winding temperature relay
pressure relief valve
restricted earth fault protection
differential protection
tx earthing

Answer / ramu

differential protection

Answer / dinesh

1) Differential Protection
2) Winding Temp
3) oil Temp
4) Under Voltage
5) Under Frequncy Protection for Higher Range of Power
Transformers
6) Bucholz Protection
7) Pressure reilef Valve
8) Restricted Earth Fault Protection
9) Master Trip (ie Inter Trip )Conected to isolate X'mer
Brom Both Ends

Answer / remus de jesus

In our design, the common protection would be:
1. Bucholz Relay (96) - initiates transformer differential
lockout
2. Pressure Relief (63) - initiates transformer
differential lockout
3. Winding Temperature (26W) - initiates first a timer set
between 0 to 30 minutes, and after a pre-determined time
will initiate differential lockout
4. Oil Temperature (26Q) - initiates a timer set between 0
to 30 minutes, and after a pre-determined time will
initiate differential lockout
5. Sudden Pressure - initiates transformer differential
lockout
6. Transformer Overcurrent (50/51/50N/51N) - initiates
tripping of low side breaker
7. Ground Protection/Ground Overcurrent Relay (51G) - the
connected relay in the neutral of the wye winding is used
generally to protect bank circuit from ground faults

Fire fighting protection protects transformer from external
fires. But if fire is caused internally, this mechanism
provides no protection of the transformer at all.

Answer / venkat iyer

1) Differential Protection
2) Winding Temp
3) oil Temp
4) Under Voltage and over voltage
5) Under Frequncy Protection for Higher Range of Power
Transformers
6) Bucholz Relay Protection for oil cooled transformers (to
detect incipient fault)
7) Pressure reilef Valve for oil cooled transformers
8) Restricted Earth Fault Protection
9) Overload, short circuit and earth fault protection
10) Protection against fire in case of oil cooled
transformers
11) directional protection

Answer / rajendran.m

a.Buzhalls type
b.Breather type.

Answer / dinesh kumar

1.Gas Operated Relay ( GOR )/Bucallas Relay
2.Magnetic Oil level Guage
3.Winding level Indicator
4.Oil Level indicator
5.oil Pressure indicator

Answer / minal

one of the protection systems used in the transformer is
Gas operated Bucholz relay.
The transformer is filled with oil. On passing current
through it, gas bubbles are formed inside it.After the
formation of gases, immediately the relay gets operated &
it will sense the gas which gets build inside the
transformer. These gases are harmful and which switchoff
the transformer. This relay sense the gas & trip off the
transformer before a fault is occured

Answer / hassina bibi

1.Buchholz relay
2.Lightning arrester
3.Differential protecton
4.Sudden pressure relay
5.Pressure relief relay
6.Overcurrent relay
7.Overfluxing relay
8.Overvoltage protection
9.Restricted earth fault relay
10.HRC fuses (Small distributon transformer)
11.Horn gaps
12.Thermal Overload relay

Answer / remus de jesus

And another thing....I thought I have already said it...

8. Transformer Differential Protection (87T) - initiates
transformer differential lockout

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