can we synchronize star system generators with delta system
generators?
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Answer / kayode
Yes as long as they operate on thesame power output,frequency,and rpm.
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lead acid battery electrolity?
When the DG is running at the time we can connect to capacitor banK? why it is required or not
in dc series motor if field wdg is shorted then
how to convert single phase supply to 3 phase or 3 phase to single..?
How can we find out LT UG cable fault (size,from-4*25mm sqr to 4*300mm sqr)? How mani types UG cable faults?
In case of 3Phase Supply, Voltage R-Earth/Neutral - 220 Y-Earth/Neutral - 220 Z-Earth/Neutral - 220 Total is -> 660Volts Then Why it is said that 3Phase supply is 440
6 Answers Hindustan Unilever Limited,
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?
Which is the best between SCADA & PLCC & Why ?
Why lose 1 phase voltage in 33kv to 415v stepdown transformer
why nutral and earthing wire connect with each other in main panel board.
in HT service 3ph 4 wire service Y-phase voltage shows zero . whether it is meter fault? or what be the reason ? if y-ph voltage zero ,can current is recorded? reasons for failure?
why humming sound occured in h HT transmission line
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