Answer Posted / vijendra kumar bairwa

The power √3 VL IL Cos φ delivered by the alternator for the same value of current, depends upon p.f. (Power Factor=Cos φ) of the load. But the alternator conductors are calculated for a definite current and the insulation at magnetic system are designed for a definite voltage independent of p.f. (Cos φ) of the load. For this reason apparent power measured in kVA is regarded as the rated power of the alternator.
Why alternator rated in kVA.

mention hazard experienced during installation

1977

---

What is the reason behind current flow(20 A) in amain earth cable of an SMDB? Is cuurent flow(45A etc) through a neutral cable acceptable?

1981

---

I have 2 KW electric water heater.I am gonna use it in controlling water temp.so I needed to increase or decrease the heating capacity.is there any electrical-electronic circuit for varying the resistance & so current?

3283

---

Why single phase induction motors are not self starting ?

1654

---

Whats the difference btwn a latch, port,data bus buffer? Do they all not hold data in d flip flops??

2397

---

what is PDU in transformer?? which company manufacture??

1897

---

how can check the resistance of battery contact?

2201

---

what is the use of static frequency converter and static excitation equipment? and where it is employed? for what?

3480

---

WHY IN AC DRIVES,INPUT PHASE CURRENT SHOW UNBALANCE?

2299

---

Why power factor should not be in leading (capacitive) mode of any load.

7023

---

it is possible to measurement of tension of slipring induction motor(SRIM)carbon brushes, any maesuring instruments are available in the markets.

2014

---

pls,send the previous year written test questions.

1916

---

sir please send me techinical questions for junior engineer posting in bangalore railway i am diploma holder

2098

---

EXPLAIN THE TERMS "INTEREST AND DEPRECIATION" AS APPLIED TO ECONOMICS OF POWER GENERATION.

2317

---

WHY RATING OF VCB NOT LESS THAN 630A

2620

---