Interested to Buy Any Domain ? << Click Here >> for more details...
how fault in an electric system is detected & hw protection
of equipments is done ?
- 6 Answers
- 9744 Views
- NTPC, RLY, I also Faced
- E-Mail Answers
Answer Posted / mandar
whenever there is a fault in the system there is some change
in electrical parameters like freq, voltage, current, phase seq.
by detecting the changes in those parameters using relays we
can protect the electrical system
| Is This Answer Correct ? | 3 Yes | 0 No |
Post New Answer View All Answers
what will be the effect if you were using different brands of outlets?
How do we calculate transformer oil in liter from the rating of the transformer.
What is pole of the system?
How can we calculate the transformer rating if the load calculated is 1000KW (11Kv Supply)?
A 10 MVA, 66KV, 50Hz, Y-connected 3-phase alternator has synchronous reactance of 0.635 Ù. It is working at full load at 0.8 lagging p.f. condition. Find torque angle, neglect armature resistance.
we use capister for power factor. when we use capaciter in dg circuit than defect dg. can we use capaciter bank for dg circuit
explain different types of d.c motors?
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?
Give some differences between open loop and closed loop control systems.
What is the effect of interchanging core(made of steel) and winding(made of copper) material in case of transformer? Give proper explanation in regard to different losses in transformer.
Hi Friend I am used multimeter to measure the voltage between R Phase(SS1) to R Phase(SS2). In SS1 is connected with UPS loads. But I am getting voltage between these 2 R Phases. Please give some idea friend
Rules and standards of electrical control wiring ?
What is the minimum IR value of HT/ LT cable? Pls post separetely!!!!!
how i can calculate the size for fire cable
please send the IS strandard for electrical to sakthi_murugan86@yahoo.co.in
