Please explain open transition and closed transistion
system in Star delta Starter?and also the state difference
of both?
Answer Posted / krish
When a motor starting with star/Delta starter,In case of
Open transition during change over time from Star to Delta
for momentarily the supply will interupted for the motor &
it changes to Delta,But in case of closed Transition there
connect resistance will when change form star to delta &
this arrangement will avoid the open Interuption
| Is This Answer Correct ? | 10 Yes | 1 No |
Post New Answer View All Answers
Rules and standards of electrical control wiring ?
What is capacitance?
How many methods use the load flow solution?
what is the thumb rule for determination resistance of resistor?
how to calculate transformer turn primary & secondary side 11kv to 420v
In a Impedance Based Distance Relay (Quad Characteristics) - Could there be two different Line Angle(RCA) for Ph-Ph & Ph-Gnd? If So Kindly Let me Know.. Where, What are the advantages of the same?
why fractional pitch winding generally used in alternators?
how can see the ac indoor or out door ac which Tr
state types of reflectors in illumination engg. ???????
what will happen if the prime mover on the field excitation of the on-coming generator fails?Explain.
how to protect motor in dol starter having capacity of 30 hp.40 hp?
What is deference between MCB & MCCB & ISOLATOR
1. What is differential relay? How it operates? 2.How to calculate the Short Circuit Impedance in Transformer? 3.What is the alternate solution for testing of polarity by using polarity tester while its milli ammeter does not works? 4. While testing the 33KV Busbar by using Hipot kit, what should be the test voltage we have to apply? 5. What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer? 6. Explain how you can give the overload setting to any Motor Protection Relay for a HT motors with formula and example? 7. Why restricted earth fault protection is needed? Why can’t differential Protection is sufficient? 8. What should be the minimum and maximum ohmic value for earthing? 9. Why DC Currents are not used in transformer? 10. What is the Frequency while we step up the voltage from 220V to 11KV? Is it possible? Explain it?
What is the difference between relays and contactor construction wise?
standard earthing rating for power line..