What are the different protection systems used to protect
the transformer internally and externally?
Answer Posted / 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.
Is This Answer Correct ? | 15 Yes | 1 No |
Post New Answer View All Answers
Operation of isolators.
How to calculate cable size in HT AND LT
Can any answer me ,What will be the range of C.T coil for L&T energy meter EM301 used for 180 kva DG set
EXPLAIN THE TERMS "INTEREST AND DEPRECIATION" AS APPLIED TO ECONOMICS OF POWER GENERATION.
describe the fully control circuit diagram of ac drives
what is interfacing in computer studies?
What is the different types of cable & current capacity of cable
wat is d diffr btw shunt coil and trip coil in VCB?
difine electrical ballast in HPSVL
full form of flry b
how does a shunt reactor maintains the bus voltage???
in india per day how much power is generated including all power station
what are the range of memory address in plc for L&T lx7 4A
please tell me when we start motor without load in star or delta connection whose current above condition,pl write formula
Could u pls tell me the NPCIL electrical engineering interview questions for Executive trainee, and also guide me how to face the interview.