We normally make oil soak pits under Transformers. Oil from soak pit goes to collection pit. We provide granules/pebbles under transformers. My question is weather granules/ pebbles to be filled in soak pit or not? if yes upto what level?
why two point starter,three point starter, four point starter cannot be used for A.C machines?2 2857
How many types of DC current2 2577
What is sinusodial & non sinsodial current1 2033
What is earth?
why we use crushed stone in switch yard?3 3434
why we use salt for earthing?1 1429
why we take transformer reading in kva6 3867
Why the transformers are rated in KVA. ? in new view.2 3947
Which of the following loss varies with the load A hystresis loss B eddy current loss C copper loss D core loss1 2427
In auto transformer if power transferred inductively and conductively are same, the ratio of output/input voltage is A 1 B 0.7 C 0.5 D none of above2 7991
kVA rating of open delta connected transformer is _____% kVA rating of delta/delta connection A 50 B 70.7 C 57.7 D 75.72 2987
Scott connection is used for A 3-phase to 2-phase conversion B to achieve higher effciency C to save copper D to reduce harmonics1424
How many types of losses occur in a transformer?
I WANT BHEL PREVIOUS QUESTION
If we have use two power cable for incomer, that time how many use cbct for earth leakage protection? 1 or 2 if 1 way? If 2 way?
induction 3 phase motor terminal connection
What should be the voltage between Neutral and Ground in secondary side of the step down transformer (230 V to 110 V) with no load condition?
How a capacitor discharge weld power supply works? what is the use of a pulse transformer?
Why can't we take NO LOAD TRIAL of motors having V1 mounting??
can anybody send me syllabus of rrb section engg (electrical). and also send previous question pepar...
What are the advantages and disadvantages of the dc motors?
hi friends this is a newcomer in your community of enthusiastic peoples. i am preparing for SSC (CPWD JUNIOE ENGG EXAM FOR ELECTRICAL) pls guide me on the same how to crack it? PLS LET ME KNOW IS ANYONE THERE WHO PASED IT? CAN I GET THE QUESTION PAPERS OF PREVIOUS EXAMINATIONS?
why do we carry out winding resistance test?
Minimum IR value of 1.1 kv grade 3.5c (300, 240,185,150,120,95,70,50,35,25) sqmm Aluminium XLPE cable and 4c (16, 10,6 & 4) sqmm cu arm cable between RY,YB,BR,RN,YN,BN,RE,YE,BE & NE.
What is touch potential and step potential?
WHY MOSTLY Rph IS USED FOR CONTROL CIRCUITS AUX. SUPPLY ?