what happens when d cexcitation given to alternator is
removed while it is running or what happens when dc
excitation is failed in alternator while running?
- 10 Answers
- 19322 Views
- I also Faced
- E-Mail Answers
Answer Posted / nishad
Generator will not produce any output voltage and it will trip the generator output breaker by the loss of excitation monitor protection relay or under voltage relay. If the breaker not trips by these relay, it will trip by reverse power relay. Due to the presents of Reverse Power relay, it will not allow the Generator to run as an induction generator and will trip the Generator breaker, thus it protect the generator from further severe fault. Again, if it not trips by these all protections, alternator will work as induction generator due to the residual magnetism in the field core when it is running in parallel and it will give the over load to another generator as a result, it will trip entire system. Also, as an alternator typically isn't designed to operate as an induction machine, the windings on these machines will heat up and damage. Therefore, need to make sure the reliability of protection relays to avoid such faults.
| Is This Answer Correct ? | 3 Yes | 0 No |
Post New Answer View All Answers
difference between Ac and Dc mcb ????
Define ampere
What are the characteristics of negative feedback?
i want use the cable size 16cx4 core aluminium usege watts 240x2000w this cable size is correct?
What are the reasons for the parallel operation of transformers?
How To increase Knowledge Of boliler regarding To Only Electrical Field..
give single line diagram of D.G distribution form alternator to main L.T panel?
how many types of motor can be used in washing machine
please tell me when we start motor without load in star or delta connection whose current above condition,pl write formula
What is effect on in zone and out zone fault if CT chosen for phase side is Vk/2<5mA and Neutral side is Vk/2<15mA on REF protection of Transformer
for what voltage will reactive power be largest in 380 kv line : a) 375kv b)380kv c)385kv
can i use 2000/5A Clamp meter to measure HT cable
What is the difference between circuit breaker and isolator
Is vtg is controlled by the resistor? if else how much?
how to know the diffrential relay setting of 06mva step- down (delta-star)transformer?
