what are the duties of commutator in motor and generator?
Answer Posted / jayaram
Incase of generator alternating current into unidrectional
current(dc).
Incase of motor direct current converts to alternating
current
Is This Answer Correct ? | 15 Yes | 4 No |
Post New Answer View All Answers
what things to be considered when designing UPS
i need previous entrence exam papers of nhpc.
Batteries. What is the difference between Lead and Nickel batteries ?
-What should be minimum value of insulation resistance and maximum value of earth resistance at any electrical instillation and what is method of testing the same.
in single phase converter, the no.of scr's conducting during overlap a)1 b)2 c)3 d)4
What are differences between Voltage, EMF & Potential difference ?
before synchronizing an alternator,power factor is leading ,why?
which connection is safer series or parallel?usually which connection we prefer at home?
What is a advantage of Self Reset Lockout ? On Fault breaker get trip & fault no longer exist then self reset lockout how inform us?
How to calculate energy stored in a capacitance
How many double suspension hardware fittings are required on a double circuit transmission tower?
Do any one know exacatly when the results for NHPC held on 8th march 09 for engineering trainees will be released ?. if so please post it, i'm eager to know it.
what is the vvvf in the dumbwaiter?? or lift. what is the actual process?/
234 MVA Generator 3 phase Short circuit current Values required? Gen set Rating-234 MVA, Gen Voltage-18kv, PF;0.8, Xdv:23.5 %, Transformer Rating-18/380KV, 680MVA,Yndd1 two winding, Step up TR, ZT:35.50 %,X/R 4.33 Gen CB Position, CB open ,Disconnected open, Generator Running Voltage 18 Kv, Bi mistakes generator side earth switch Closed during that time short circuit current level in 3 Phase required, and how to test on site 234MVA Generator Short circuit current,
can some one clearly explain why -48 volt DC use in telecom site????