Answer Posted / k.prakashchandra
It is also called 'Line clear' or 'Work permit'
| Is This Answer Correct ? | 1 Yes | 2 No |
Post New Answer View All Answers
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?
IN dc capacitive reactance is??
in 1-phase 230v,how in 3-phase 440v. in each phase in between 230v.
What is the type of earth fault protection used in battery? explain.
Explain the method to keep noises low in a control system?
What are the advantages of using distance protection schemes as opposed to normal overcurrent/ earth fault protection on high voltage feeders.
how can calculate 1kva generator running time in 1 liter keroscene
What are the applications of autotransformers?
what is meant by twilight switches 7 where its applicable ?
Is it true that in the 3 phase transformer, the limbs of the core are at 45 dgrees to each other. if true, why?
describe the constructional features of an auto transformer and its principle operation
what is the current density of copper & alluminium.
Generation of voltage for each phase are same of a turbogenerator.Although the short circuit current flow when two phase of turbogenerator are shorted(where current can't flow without potential difference),why?
How should i design a 1ph & 3 ph transformer. Kindly let meknow all steps and formulaes related to design from scratch.
What is the maximum percentage voltage drop (vd%)for a motor control center