Answer Posted / sunil kumar sinha
An alternator is AC generator. It will generate power only
when it is rotated by a prime mover and supplied electrical
field in its rotor circuit. The alternator when producing
electric power is connected with grid and supply electric
power. Here the prime mover supplies active power and field
maintains the voltage.
when primemover fails but excitor supplies rotor field, the
alternator will continue to rotate on grid frequency for
which it will draw power from grid. the reverse power will
flow, nothing wrong will hapen with alternator but if prime
mover is steam turbine there is every possibility of rotor
blade failure of L.P. turbine.
If prime mover with rotor field also fails, alternator will
continue to run but it will damage turbine and generator
rotor as well.In this case the alternator will take active
power and field from grid. The field current will flow
through the surface of rotor through moon slot which will
excessively heat rotor which may damage rotor winding.
| Is This Answer Correct ? | 31 Yes | 4 No |
Post New Answer View All Answers
Shall I use 40A semiconductor Fuses in 32 A SFU ? Frame size is same. What Happen if Fuses burn on SFU?
Why does inductive loads consume KVARs?
what is the eight bit unit?
List the disadvantages of constant k filters?
In an ACB shunt trip coil and undervoltage coil operated normally( breaker open and charged). But closing coil not operating untill manually discharge and recharging. Any help.
why core is useful for a transformer ?and also in its operation ?
can the measured percentage error during calibration of single phase energy meter be negative?
what causes contact chatter when there is no demand on the air conditioning unit?
what is the calculation method to design core and winding of a 200kva 3phase distribution transformer?
What is meant by coupling capacitor?
What would cause a 240v choke that should give 110v out on a 16w lamp to gradually increase to 160v?
What will be electrical cost per sqft for IT building (basebuild and fitout)and for residential township?
when the Transmission and Distribution network where is the "feeder" lines are located? and why should be used in T&D network.....
why the name trunking bus PT
WHat is the requirement of installing FAST ACTING EARTH SWITCH in GIS and how is that integrated with protection system. How and when does it operate?
