Interested to Buy Any Domain ? << Click Here >> for more details...
what is starting current and use of starting current?
- 3 Answers
- 8065 Views
- I also Faced
- E-Mail Answers
Answer Posted / kamlesh g patel
starting current of motor is same as inrush current of
transformer.
starting current of motor is about 5-6 times its rated
current & this is due to non availability of back emf
during starting.
motor torque is proportional to the current means high
starting current produces high strting torque which helps
in starting the machine from stndstill condition.
| Is This Answer Correct ? | 2 Yes | 1 No |
Post New Answer View All Answers
We have drive feeding an output contactor for a 5000 hp motor @ 5kV application. The motor FLA is 629amps x 1.25% service factor = 786.25 amps The cable that we current have in place between the drive and the output contactor is 350kcmil- MV-105 (parallel cables). Per the NEC table 310.60 (C) (69). This show the cable ampacity is at 615 amps per cable for a rating of 1230 amps. We have derated the cable for the cable tray and the multiple cables application and our calculations show that after the correction factor factor we are at 922amps. 1230 amps x .75% correction factor factor = 922.5 amps. The customer is driving us to then use another safety factor of .25% off of the already derated cable. Can you please provide a longhand calculation for your solution on this application?
what is allowable ac mixing in dc
Enlists the applications of sampled data systems?
when ac current flows thru d coil of a contactr,it energizes,magnetic field attracts d contact of the coil...nw wont dt ac current in d contct induce current back on to d coil thru mutual inductance leading to high currnt in d coil
How to calculate cable size in HT AND LT
Please tell me the earthing procedures adopted for the STAR-STAR 3 Phase transformer in india and give a better sugession for earthing
Mention how NPN and PNP transistor works?
how to decide choke rating for drive?
What is the difference between vector surge relay (78) and Pole slip relay (98G)
can i connect REF and Differencial relay in 1 CT core for transformer protection?
Discuss the effect of sudden loading of an induction motor
how we can decide that what value of ht line will come to any commercial building? (ans except According to the building load)
Define conversion efficiency of a power amplifier.
how synchronous condenser is used in place of synchronous generator with out negotiating IEEE standards? Can i use 3 generators as synchronous generators and 2 generators as a synchronous condensers in an IEEE 14 bus system with out disturbing the standards?
how to generator maintenance (A Check, B check,Etc)
