What is the formula for finding fault level of generator?
- 11 Answers
- 35140 Views
- I also Faced
- E-Mail Answers
Answer Posted / ramesh
I would like to answer by way of an example:
Generator capacity = 12MVA
Generator sub-transient impedance = 12%
With above two data,
the generator fault level can be calculated as folows:
Generator fault level = Generator capacity / generator sub-
transient impedance
Generator fault level = 12 MVA / 12% = 12MVA/.12 = 100MVA
To get fault current = Generator fault MVA / (1.732 *
generator rated voltage)
In case of single phase generator 1.732 to be ignored.
| Is This Answer Correct ? | 49 Yes | 4 No |
Post New Answer View All Answers
What is the effect of pd controller on system performance?
What do you understand by oldham's coupling ?
5.WHICH TYPE WELDING PROCESSES USES NON CONSUMABLE ELECTRODE.........
An ELHNC 80amp 240v 30mA RCD is tripping periodically, every 30 - 180 seconds is it safe to disconnect the protection circuit?
what would happen if reactive power (kvar)is increased (more)or decreased (less)? how much exact reactive power should be maintained? and what should be done for that
What is the theoretical reason for the size of a zig zag grounding transformer to be 1.732 times less than that of a wye-delta grounding transformer used for the same application?
what is the purpose of slope in the differential relay?why we are using two slope?but in busbar differential we are using only one slope.why?
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?
what will happen if OLR CT in all phases are short circuted
700KW 6.6KV slip ring induction motor to use VFD to control the speed
What is meant by cold loop test in instrument
Operation carried out in thermal power stations?
What is an iron loss or core loss pi?
IF HT CAPACITOR IN ON POSITION IS THERE ANY LOSSES I.S I SQURE OCCURS IN THE SYSTEM
What is the lifetime of a Thyristor? Is there a recommended lifetime for thyristors after which they should be replaced?
