what happen to a dc series motor if it given as ac supply
accidentaly
- 2 Answers
- 4158 Views
- ONGC, I also Faced
- E-Mail Answers
Answer Posted / shraddha
if ac supply accidently given to dc series motor, for first
half cycle it run but another negative half cycle it should
be run opposite direction but due to rotor inertia it will
not happend but there is opposite force excerted on rotor &
motor stop this process require fraction of second so it
look like its not running.so motor will not running.
| Is This Answer Correct ? | 7 Yes | 3 No |
Post New Answer View All Answers
in dc series motor if field wdg is shorted then
earth also having a gravitational force (magnetic field of north and south)but it attracts any object compare to this theartifical magnetic cant perform same as earth why?
control & auxilary circuits used for circuir breakers
What is meant by rotor?
Name two types of electrical analogous for mechanical system.
When we use air circuit breaker, it has O/L protection ,time delay SC protection, Instataneous SC protection & ground fault protection. They all have some setting range. But what is the suitable/allowable setting for the above protection which will be safe for the equipment? For example-O/L protection setting have a range of (0.4,0.45,0.5,0.55,0.6,0.65,0.7,0.8,0.9,1.0)xIn Time delay SC protection have a range of (1.25,1.5,2,3,4,6,8,10,12)xIn Time delay setting is 0.02,0.1,0.2,0.3,0.4 Instataneous setting is fixed to 20xIn Gound fault setting is given 100A,300A,600A,900A,1200A This setting are for 2500A ACB. So what will be the basic allowable setting for the above protection? is there any formulae to calculate this<
3 shows a 415 V, 3-phase generator supplying a 3-phase 415/110 V transformer. Draw the individual and combined impedance diagrams to a base of 10 kVA. Determine the system fault kVA and the fault currents at the 415 V and 110 V busbars for short circuit faults on the transformer input or output terminals. Work in p.u. values of impedances.
Haw to check conductivity of budbar
what is the difference between the characteristics of two different phase bushing of any transformer
What OPGW is better than Microwave or PLCC???
Write the analogous electrical elements in force current analogy for the elements of mechanical translational system.
Saving in copper achieved by converting a 2 winding transformer in to an auto transformer is determined by A voltage transformation ratio B load on secondary C quality of core material D size of transformer core
what is per unit calculation?looking for simple and strong explanation thk u
what are the assumptions made in swineburne's test?
Define load factor?
