Interested to Buy Any Domain ? << Click Here >> for more details...
what is percentage impedance of transformer? explain its
significance
- 2 Answers
- 17849 Views
- ABC, Bosch, I also Faced
- E-Mail Answers
Answer Posted / raul
percentage or per unit impedance = (Acutal impedance of the
transformer) divided by Base impedance .
1) The percentage impedance basically defines the short
circuit capability of the transformer bcoz short circuit
current is inversely proportional to the p.u impedance of
the system.
2) Secondly, it defines the voltage regulation of the
transformer bcoz max. voltage regulation is directly
proportional to the p.u impedance of the transformer.
So a high p.u impedance will reduce the short circuit level
and on the other it will result in poor voltage regualtion.
And a low p.u impedance will result in higher short circuit
level and good voltage regulation.
So the transformer are usually designed with a moderate p.u
impedance of say 5.75% to 8.75% to achieve both the low
short circuit level and good voltage regulation.
| Is This Answer Correct ? | 13 Yes | 2 No |
Post New Answer View All Answers
How eddy current generation support the idea of train braking?
what is errection pcbs?
Initially, when the input is not equal to the output — what type of response is this?
what is interpose? where it is used and why it is used?
Explain what is use of lockout relay in ht voltage?
what is smart grid? why we use it? explain in detals bcoz i want give presentatin from it....
What are the types of piano switches?
What is resolver and glass scale in CNC how they work?
What are dcs and plc?
please send the last 5 years {{{JUNIOR ENGINEER - ELECTICAL, ELECTRONICS RRB CHENNAI and secundrabad}}} TECHNICAL question papers TO MY EMAIL ID dinesh100701@gmail.com
What are the types of power in electrical power?
what will happen if the prime mover on the field excitation of the on-coming generator fails?Explain.
1hp= how much rpm
when 20hp 3 phase motor start no load condition in star or delta connection.find current and write formula.(tariq)
what is the pulse and audio frequency transformer? what is different between induction regulators and tap changing transformer?
