Answer / ramaswamy venkatachalam

At the factory, it is tested by applying twice the voltage.
ie, 2U. If a dc kit is used, (2U)/sqrt(2) + 1 KV. Which is
a minimum of 48 kV. You can use 50 kV test kit for the same.

Convert the ac rms voltage to dc by dividing by sqrt(2) and
multiplying it by 2 and adding 1kV to it.

Answer / gunaskaran

for ac 0.8(2E+1) normally we r doing in ac if customer
asking we can do the dc for DC (2E+1*1.414)0.8 this 1.414
is AC to DC conversion this for site for factory we have to
applie 100% voltage

what is the slip of synchronous motor

1 Answers  

---

what is meant by unity power factor?unity means one why dont call 2,3,4......?

6 Answers  

---

what is high pot test on 11kv switchgear and how to apply high voltage on panel what is spheare gap and how to determine its celeberation.

1 Answers  

---

why breather cap filled with oil?

7 Answers  

---

1)how to reduce the value of tan delta of trasformer and CB,bushing,CT&PT,CVT ? 2)how to reduce the resistance of CB contact and its operating time? 3)plz.....send me the project report on conditioning and monitoring of substation equipment on my email id (gusaiyogendra03@gmail.com)

0 Answers   L&T, PK,

---

ITI r/tv trade APPLY (J.T.O VACANCEY) ALSO INCLUD AITT ELECTRONIC,WRITEEN XAM DONE 23.03.10 BUT NO RESPONCE WHY ANATHER ID gopal_gh007@rediffmail.com

0 Answers   KBC, wbsedcl,

---

electricity requires a medium to flow and it cannot flow through air. so how does lightning come to earth through air without any medium?

3 Answers  

---

how single phase preventer works ?

0 Answers  

---

Whats the principle of lightning? How protection against lightning is achieved? Types of protection? How to select the height of lightning spike? as per the area.

4 Answers   HAL,

---

what is the maximum current rating in india for home?

3 Answers  

---

Who many reason of ignition fail ?

0 Answers  

---

Off-circuit Tap changers in distribution transformer required

1 Answers  

---