Answer / pkv

deta /star transformer is used in case of power supply
trnaformer

Answer / koti

1. Star / Star
2. Low Voltage Wdg
3. Zero (Cos 90=0)

Answer / guest

the power factor of purely inducive load is lagging.

Answer / gaurav agarwal

1. star/delta
2. secondary winding

Answer / nadhagopal

star to delta
lagging for pure inductive
leading for pure capcitive

Answer / guest

in power supply transformers star delta conn. is prefered

Answer / praveen kumar gupta

1. Star/Delta Type of transformer connection is preferred
in case of power supply transformers.

2. In a power transformer usually Low Voltage winding is
closer to the core

3.The power factor of a purely inductive load is Lagging

Answer / shah faisal

Q1.C
Q2.C
Q3.A

Answer / moloy dey

1. In case of supply transformer DELTA/STAR is used to
ensure 440[Ph to Ph] and 220 [Ph to N] both type of consumers.

2. (A) Primary winding stays close to the core.

3. The power factor of a purely inductive / capacitive load
is always (A) Zero, Hence, the power drawn by a
pure/loss-less inductor/capacitor is VxIx'0' = '0' [Zero]

what happen if the secondry winding of the transformer is having less no of turns compare to the primery winding.

2 Answers  

what is the condition for vector group of Dyn5

2 Answers  

where we use zero sequence current transformer or core balancing ct.

2 Answers  

How much minimum insulation required between 11kv/3.3kv transformer windings?

0 Answers   Descon,

what is meant by mimic diagram ?where it is used ?plz explain briefly

2 Answers  

Can anyone tell the proper diagram of star delta starter????

0 Answers  

How you calculate the repturing capacity of a HRC fuse

0 Answers   CPCL, RSCL,

i have done diploma and btech in EE and live in Chandigarh so kindly help me how can i make my competency certificate in my area.

0 Answers   Multi Metals, ONGC,

why capacitor do not switch ON the DG power? (I had checked, capacitor ON in DG power that time current rating was reduced.)

1 Answers  

MY QUATION IS ABT THE MAIN POWER TRANSFORMER IN STEEL PLANT , I WISH TO KNOW THAT WHY TRANSFORMER PROTECTION NOT TRIP AS CABLES ON THE SECONDAY SIDE IS WATER COOLED. TRANFORMER DETAIL NORMAL KVA--150 KVA PRIMARY VOLTAGE --34.5 KV SEC.NO-LOAD VOLTAGE---1.290-908-690V ( WITH PRIMARY DELTA CONNECTED) CONNECTION--D/d (EXTERNAL CLOSED) CONSTANT RATEING FROM--1.290-908V CONSTANT CURRENT FROM--908-690 VECTOR GROUP--D III

1 Answers  

1.Z transform always lies around ? a) origin b) pole c) zero d) z=1. Multiples Mcqs which is bother me can’t find answers on internet. Some help required with little explanation . Note: this is not homework or related to any test. Thanks

0 Answers   CCP,

how many testing is necessary for 27 MVA transformer?

1 Answers