single phase for 230 then why three phase are 440 volt
Answer Posted / sudarshan
three phase 230v line to line is also available
Is This Answer Correct ? | 1 Yes | 3 No |
Post New Answer View All Answers
Wind mill
How wire size can define in electrical wiring? What is the ratio?
How will polarity test of Dy5 Transformer ?
what is acceptance test in electrical engineering.
How to decide no. of Step and Kvar for APFC Panel 40 kvar MD: 33.12 KVA Avg pf : 0.8540
what is the difference between electrical choke and electronic choke?
On what cycle does thermal power plant operate?
condition Autotrip facia come on control panel of electrical transmission line?
Why hydropower is called renewable source of energy?
How to size fuse? How to size MCB?
PLZ sent the previous year question paper for GET in NHPC on my EMail id ppshanker@gmail.com
How to synchoronize the generator (with gcb,GT) to grid????? ????? from Grid iam getting power (rated 400kv/20kv) through GT and its goes to UAT.,,ST.,, now my generator(rated 20kv ) ready.,, now iam closing my GCB.,, in GT iam suddenly giving 20kv on that Gt.,, what will happend
What happen when neutral point connected to core balance current transformer? (Neutral point of an alternator of a 180KVA DG. Neutral point connected to CBCT means enter to the CBCT)
What's mean HVF & HAF in Vacuum Circuit Breaker?
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?