Why generator field rheostat is set to maximum position and
motor field rheostat is set to minimum?
- 5 Answers
- 41936 Views
- Bhel, College School Exams Tests, TCS, Texas, I also Faced
- E-Mail Answers
Answer Posted / r.sridharan
In generator there is nothing to limit current.Hence winding will over heat and burn.In order to protect generator we kept at maximum position.
In motor to increase torque at initial condition rheostat is kept at minimum position.
| Is This Answer Correct ? | 84 Yes | 16 No |
Post New Answer View All Answers
temp of cast resin 1500kva tx formerwent up to 138.c but came down very fast to about 100.c within 20 mins when load was reduced from 70% to 60%
What is the maximum operating temperature for a thermoplastic insulated cable?
132/6.6ππ πππππππππππ πππππππ πππ πππ πππππ πππ πππππππππ. πΈ'ππ πππππππ πππππππππππ ππ 6.6ππ/415π πππ πΈ πππππππ πππππππ ππ ππππ πππππ πππ ππ ππ 13/6.ππ πππππππππππ?? πΈπ π½π.. ππππ π ππ’??
What do you mean by lighting transformer?
How would you relate your key competencies to this position?
Why we use duplex coil and hook switch in telephone system?
As per the Anchor capstan motor specification, full load current is 200A. starting current is 1750 A and acceleration time is less than 8 seconds. Please guide for selection of cable size.
tell me some type of questions throught which i can prepare for exam and do my best
current transformer balance the power level on both sides. e.g in case of step up, at secondary side voltage rise but current decrease and vice versa in case of step down transformer. but how this power level remains same in case of current transformer and voltage transformer
What is the drawback of static coefficients?
why is using sensor?what is differece between photoelectric and proxmitty?
What is the purpose of stand by earth fault protection for transformer ?
If a 3 phase induction motor is in off condition in the conveyor and rotor of the motor keeps moving with the conveyor than the resistance of windings of motor varies. why is it so ??
Write the analogous electrical elements in force current analogy for the elements of mechanical translational system.
WHAT SHOULD BE THE BEST CURRENT RATINGS (PRIMARY / SECONDARY)FOR A CT INSTALLED AT THE INCOMING 11KV PANE? WILL IT BE CALCULATED ON THE BASES OF MAXIMUM DEMANT VALUE OR ON SUM OF ALL TRANSFORMER'S KVA? NOMALLY MAX DEMAND REPRESENT THE MAXIMUM OPERATING LOAD OF THE PLANT AND TOTAL KVA OF (SAY 5 NUMBERS TRANSFORMERS) REPRESENT THE CONNECTED LOAD. WHICH i.e. MAX DEMAND KVA OR CONNECTED KVA ARE BETTER TO USE FOR CT CURRENT CALCULATION? PLEASE ANSWER.
