Answer Posted / zakir ali khan

any machine basic working principle is FARADAY LAWS of
electro magnetic induction:
1st law:when ever a conductor cuts a magnetic flux an EMF is
induced dynamically in the conductor.
2nd law:induced emf proportional to flux linkages(N,rate of
change of flux).
based on 1stlaw emf induced in transformer.
step down:as secondary turns are low flux linkages is less
hence induced emf is low in secondary camored to primery.
step up:as secondary turns are high flux linkages is large
hence induced emf is high in secondary camored to primery.

Define sensitivity?

659

---

What kind of preventive maintenance are there for transformer?

1781

---

How many Zones can be in Conventional type fire alarm system & how can we detect the fire in Conv. type FAS?

1368

---

How much pf maintan in dg set in 6o% load,when Dg runnig Neutaal Earthing removed what happen.

1517

---

what exactly commisioning work does in electrical site work... LT side?..

1494

---

---

what is the solution for meger test failed the MV cable?

3517

---

why i can not use thimble on capacitor duty contactor

871

---

volts=230 c=10mf a=??

1571

---

what is meant by residual over voltage & residual earth fault ?

8425

---

Cables Construction hi friends, 0.6/1/1.2 kV LV , DC and Control cables are concentric copper conductor what does its means and what is the use of concentric copper conductor,and are this with copper tape shield or copper screening, ? thanks

1292

---

how to setting Load amps tripping time and extra settings for load Transformer protection relay with RMU panel using C&S model relay..?

582

---

which type of amplifiers are used in multimete?

1633

---

is this the formula of building wiring to get the main breaker.Watts/volts*.8%+higher motor*(25%)=ampere. yes or no or send the correct formula for building wiring.

1168

---

What is the physical significant of power factor?

1482

---

Why we use auxillary relay ? what is function of differential relay, directional o/c relay?

1621

---