Question { TCS, 3566 }

how the use of power factor correction will rsult in monthly
tariff saving?

Answer

IF HIGHER POWER FACTORS THE LOSSES ARE LOW,AND REACTIVE
POWER REQUIREMENT IS LOW SO THE NET CONSUMPTION OF POWER
WILL REDUCE,SO IT WILLREDUCE MONTHLY TARIFF

Question { TCS, 3566 }

how the use of power factor correction will rsult in monthly
tariff saving?

Answer

IF HIGHER POWER FACTORS THE LOSSES ARE LOW,AND REACTIVE
POWER REQUIREMENT IS LOW SO THE NET CONSUMPTION OF POWER
WILL REDUCE,SO IT WILLREDUCE MONTHLY TARIFF

Question { ABB, 8472 }

Why transformer ratings in KVA not in KW?

Answer

IN ANY MACHINE THE RATING DEPEND UPON HEAT,HEAT LOSS DEPEND
ON HOW MUCH OF POWER LOSS IN THE MACHINE,IN THE TRANSFORMER
THE CORE LOSS DEPENDS ON VOLTAGE AND COPPER LOSS DEPENDS ON
LOAD CURRNT,i.e NO LOSSES DEPEND UPON POWER FACTOR THAT IS
THE TRANSFORMERS ARE RATED IN KVA INSTEAD OF KW.(reffer in
p.s bimbra text book electrical machines)
(OR OTHER WORDS)
KW RATTING IS DEPENDS ON POWER FACTOR ,THAT IS KW VARIES
WITH LOAD POWER FACTORS ,IF TRANSFORMERS RATED KW THE
RATING CHANGE WITH LOAD TO LOAD ,THAT IS THE TRANSFORMERS
ARE RATED IN KVA INSTEAD OF KW.(GENERAL ANSWER
rajeee43@gmail.com)

Question { 3925 }

what is use of reactive power in ac ckt.

Answer

IN AC CIRCUIT THERE IS LOT OF MOTORS AND GENERATORS ARE
PRESENT,THE OPERATIONS OF SUCH DEVICES REQUIRE MAGNETIC
FIELD TO WORKING(MUTUAL INDUCTION),TO PRODUCE MAGNETIC
FIELD THEY REQUIRE REACTIVE POWER AND REQUARE POWER IS USED
FOR ENERGY CONVERSION.(rajeee43@gmail.com)