Answer / srikanth

if frequency is increases current decreases(due to inversly
proposational) current deceases area of conductor size is
decreases(directly propsational) size decreases then power
loss consuption will be reduced..

Answer / chandru

When we increase the level of frequency, level of power
losses will automatically reduce.As we are aware of
transformer emf equation, E=4.44fNAB.
f=frequency,A=area of cross-section,B=magnetic flux density
when we increase the frequency, by having E&B as
constant,area of cross-section will reduce.So,the size of
transformer can be reduced with higher frequency

Answer / c_elavarasi@yahoo.com

frequency is inversely propotional to the reactance,so if
the frequency increases,reactance decreases thereby current
gets increased.so if the resistance is constant,voltage
increases so that the windings cant be able to withstand
the increased voltage and also if the current increases
I^2R losses will increase.

Answer / anil

50 HZ is uswed in india and also majority in other world.
some of countries uses 60 HZ as UK . The frequency is
inversly proportional to current ,so when drops current
increases or vise versa.the change of frequency is uses in
VFD to change speed .

Answer / ekanadam patlavath

if frequency increases power losses decreases
viceversa.50hz econ0mical

What kinds of decision are made about CT from it's Knee point(voltage & current)?

2 Answers  

---

A 3PH MOTOR RUNNING IN NORMAL CONDITION AND ITS AMPERE ALSO UNDER ITS FULL LOAD CURRENT,ITS CABLE RATINGS ALSO HIGER THN ITS CAPACITY,BUT ITS CABLE GETTING ABNORMAL HEAT(NOT TOO HOT)WHY ITS GETTING HOT LIK THIS

2 Answers  

---

what is a difference berween line voltage and phase voltage?

2 Answers  

---

salam, hi, how to calculate british temperature unit (B.T.U)?

1 Answers  

---

how invertor convert the dc into ac give brif detail

0 Answers  

---

---

On the secondary side of a distribution transformer, we use 1c x 630 sq mm cable. Why dont we use 4 core cables instead of 1 core cables on the secondary. Why we use aluminium cable glands on the outgoing instead of brass cable glands?

2 Answers   Siemens,

---

why is a power transformer used only occasionally?it is used to step up at generating stations?and that needs to be done all day long !!!!!!!

0 Answers  

---

WHAT TYPES OF OIL(STRUCTURE) ARE USED IN POWER TRANSFORMER INSULATION?

4 Answers  

---

1)Why potential transformer primary site grounded? 2)can be loop between neutral & body for grounding? 3)What is the difference between ELCB &RCCB? 4)Why we use iron core in transformer insted of wooden core? 5)what is the principle of excitation? 6)Why we test the core balance test for transformer? 7)what is creepage?What is the creepage length for insulators at different voltages? 8)How much type of relays used for differential protection of generator,transformer & busbar protection?

5 Answers  

---

WHAT IS DIFFERENCE BETWEEN PHASE CONVERTER AND VFD

1 Answers  

---

1. A bomber drops a bomb from an aircraft flying at 2000 km/hr. at an altitude of 7km. The speed at which the bomb will strike the earth would be

0 Answers   KNJ,

---

what is submersible pump?what is different between motor and sub motor?

0 Answers  

---