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ELCB Emergency Light Circuit Board
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what is the formula of starting current of 3phase and 1 phase motor???
How we can recongnise the phase displacement of transformer connection between primary & scondary...plzzz explain it with example.........
If i have two 3000 kW motors and the whole facility requires a 10 MVA transformer. What would be better installing two 5 MVA transformers(one for 1 motor ) or just a single 10 MVA transformer for both of them. Give reasons for your answer.
what is lumped and distributed elements?
ELECTRICAL DRIVES: can a motor load system with passive load torque can have equilibrium speed in second quadrant
Can the output voltage of a rectifier be greater than the input AC voltage without the use of any voltage multiplier in the circuit??please provide the explanation too..
How select ELCB for 32amp. socket having quantity 12Nos. We have to do this wiring in PLANT. Please Also explain the incoming cable specification.
i want to model paper for section engg.
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?
How many types oil using in transformer ? How many letars using in transformer..?
is there any phase difference occurs while primary and secondary side mutual induction occurs?
There is air in a room . the top and bottom of the room are at constant temp. T1 and T2. DRAW THE temp profiles if a. T1 greater than T2 b. T1 less than T2
Generator,motor and alternator Working principal Please explain easily
What is the rotor frequency of 10 Hp 1440 RPM 50HZ 415V ?
is the value of inductance depends upon the evalue of thitha in doubly excited machine?
