Answer Posted / gunasekaran

insulation properties of SF6 is 2-3 time than air and it is
electro negative gas so it absorb more electron at the time
of fault and normal operating condition.in acb current
chopping is occur it is will make arc between the breaker if
you go high voltage.in vcb vacuum is good insulator than air.
so higher voltage level we r using vcb SF6 breaker

sir, i'm preparing for hpcl exam officer trainee pls tell me how the exam ques paper pls pls

2246

---

In constant power region of 3-phase IM torque-speed characteristics, if frequency increases slip A does not alter B decreases C increases D none of above

2051

---

how u measure/calculate renge of capacitor,capacitor has no any rating tag.what is the theory of measure of capacitons.

1979

---

If 24 KVA AVR having Input voltage 200-400v, Output voltage 415+-1%, what will be the voltage if Load is 13A.

2092

---

What is the role of power pack in substation protection system?

2688

---

How to convert a two phase power into a three phase power in induction machine?

1803

---

when the time of backcharging the transformer three phases only enough or three phase with neutral is must.from these which one is the best one.

2034

---

hi friend i am going too attend for hpcl in this month please help me by sending written test question papers i am in the stream of E.E.E

1972

---

i am completed in B.E(Electrical and Electronics Engineering) with 8 months experience in Quality Control Engineer at Bharathi Industries,Coimbatore.

1882

---

what is sevice settings for mccb?How can be it setted?

2217

---

What are the advantages and disadvantages of the ac motors?

1109

---

all the technical question with answers pleas send your email id ramar_eee@yahoo.com

2021

---

DG cranking voltage?

4751

---

can you any one give exact mathematical relation between AC current and DC current?

1992

---

How does an oscillator differ from an amplifier?

1146

---