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Topic :: Transformer
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?
Bhel,
10544In 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 above
2 10825kVA rating of open delta connected transformer is _____% kVA rating of delta/delta connection A 50 B 70.7 C 57.7 D 75.7
2 5086In scott connected transformer number of turns in the primary winding of teaser transformer is % of number of primary turns of main transformer A 86.6 B 57.7 C 14.4 D 33.3
1 5446in 33/11kv stepdown transfomer, transformer will stepdown to 11kv & remaining 22kv where it will go..
3 6327Auto transformer starter gives the same effect as star/delta strater if its turn ratio = A 0.5 B 0.67 C o.66 D 0.577
1 3923In an ideal transformer no load primary current I0 A lags behind V1 by 90 degree B is in the phase with V1 C leads V1 by 90 degree D lags V1 by 45 degree
1 5413Transformer cores are laminated in order to A simplify its construction B minimize eddy current loss C reduce cost D reduce hysterisis loss
3348A transformer has negative voltage regulation when its load PF is A zero B unity C lagging D leading
1 8251kVA rating of ordinary transformer is increased when connected as an auto transformer because A transformation ratio increased B secondary voltage increased C energy is transferred both inductively and conductively D secondary current increased
2748At light load transformer efficiency is less because A secondary output is low B transformer losses are high C fixed loss is high compared to output D copper loss is small
1 5894
Difference between PowerPlay transformer and power play reports?
All tape of electrical questions Answers tape of motor transformer e.o.t crane
If one tertiary phase i.e. R,Y or B is earthed of a loaded type tertiary delta connected (Without load)of a power auto transformer, what is its advantage/disadvantage?
what is R Core Transformer. how it differs from normal transformers. dont search in net and post the answer.
Draw the line diagram of diffretial relay connected to transformer?
How to select the earthing transformer,for DELTA TO DELTA TRANSFORMER OR ALTERNATOR SIDE.Pls post your answers and calculation.
Why Transformer Neutral having one earth pit ( more earth electrode resistance) whereas body have many earth pit ( less earth electrode resistance)?
how we arrange the hv side with delta connection in case 33/11kv of transformer.
what is the criterion for selecting vector group of Transformers ? i mean how to decide vector group of Generator transformer, substation trasformer and transformer at consumer end
i need the curve duty cycle and amper for (150 kva @50% dyty cycle) transformer turn ratio :19 and vin 400
what is the effect of connecting three phase supply lines to three phase auto transformer output terminals through a fuse of 10Amp and a circuit breaker (MCB). Is this connection permanently destroy the transformer?
How is the percentage impedence of a transformer fixed at design stage???
How a capacitor discharge weld power supply works? what is the use of a pulse transformer?
what is a pulse transformer? how rise time of pulse changes when ever the voltage changes?
what r the checklist while installing 500 kva transformer
