last 5 year rrb allahabad junior engg electrial engg
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upto how many load can v connect to stabilizer which is used for tv
Generally in d.c. circuits the direction of current is from possitive to negative.In a.c.circuits what is the direction fo current flow
what is the difference between 3 phase 3wire &3phase 4 wire meter?what is the advantage of 3p3w over 3p4w?
why we use REF and Differential Protection in one transformers?my doubt is both protections are operated in internal fault only.why we want to use 2 protections?please clarify.
can we use ordinary transformer in place of autotransformer?give reasons also
what are the advantage and dis-advantage of 3 phase 4 wire energy meter?
Definition of grid?
7 Answers L&T, Pace Power Systems, Vijai Electricals,
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
how winding temperature detects in power transformer...?
define one ampere?
what is the principal of star delta starter?
Define maximum demand?
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