Interested to Buy Any Domain ? << Click Here >> for more details...
I have connected 04nos. earthings to a transformer through
04nos. earthing pits seperately. 02nos. earthings are
connected to T/F body, and 02nos. earthings are connected to
T/F neutral.T/F capacity is 2000KVA, 11KV/415V. But after
completing of 02 years successful operation ,we are
facing following problems-
1. CT/PT occured blast one time
2. HT cable box occured blast two times
3. One body earthing strip and one neutral earthing strip of
transformer are overlapping at some places. Whenever these
two strips are pressed at overlapped points, they made spark.
What is the reason of spark?
Please explain the reason & rectification of above problems
- 5 Answers
- 10141 Views
- I also Faced
- E-Mail Answers
Answer Posted / siva kumar
because of improper earthing the transformer neutral voltage may raise to abnormal level and may cause failure of CT/PT sets.
The star point you made on secondaries of CT, should be made at the equipement only and connected to earth to avoid transfer potential.
If you have not integrated your earth pits,
connect all the four earth pits with 50X8 GI flat.
now check earth pit resistance is with in limits.
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
Define maximum demand?
why the India electrical supply transmission loss is high when compare to us
HI SIR, AM PREPARING FOR RRB FOR SECTION ENGINEER POST. PLZ SEND ME THE PREVIOUS QUESTION PAPERS AND HELP ME. I HAVE NO ENOUGH TIME MY EXAM DATE IS 22ND JUNE.... MY EMAIL ID IS nalla.amarnath@gmail.com
Post possible questions for Power Factor Panel FAT / SAT
WHAT IS THE CURRENT CARRYING CAPACITY OF 2.5/3 CORE HI TUFF CABLE,WILL IT SAFLEY CARRY 8.6 AMPS OVER 120 METRES,CAN YOU ALSO ANSWER WITH FORMULA FOR WORKINGS OUT ,THANK YOU 3RDYR APPRENTICE.
how i chosse capacitor bank if my energy meter is 48 kvr? tell me capacitor bank chossen formula?
3 shows a 415 V, 3-phase generator supplying a 3-phase 415/110 V transformer. Draw the individual and combined impedance diagrams to a base of 10 kVA. Determine the system fault kVA and the fault currents at the 415 V and 110 V busbars for short circuit faults on the transformer input or output terminals. Work in p.u. values of impedances.
how will reduce the voltage. if 12volt/250ma transformer toreduce 6 volt
What is ST and specify its range of voltage.
1. Why is the speed of shunt motor practically constant? 2. Why dc series motor use to start with heavy loads? 3. advantages & disadvantages of separately excited generator over self excited generator?
100 MVA 3-phase alternator with earthed neutral has a reactance of 5 ohms per phase. what will be the fault MVA of generator.
1. Design a counter which counts 0, 4, 8, 2, 6, and repeats using: 1.a using JK flip flops 1.b using T flip flops 1.c using D flip flops
What is mean by spike arrester(Voltage Operated)
What happens if the Capacitive Voltage Transformer Primary neutral is not earthed. There is a CVT between Transformer and source, and the CVT neutral of the transformer is not earthed, does it effect the transformer while charging or does it effect the transformer charging process.
How generating electric power export to grid from the generating station ?
