Answer Posted / jobmon jacob

Vacuum is an excellent insulating medium. Arc is formed at the instant of contact separation from which metal vapour shoot off, constituting plasma. The cotact material are selected in such a way that the chopping current is very minimum. With alternating current arc, the current decreases during a portion of wave and tends to zero. . Soon after natural
current zero, the remaining metal vapour condenses and the
dielectric strength builds up rapidly, and restriking of
arc is prevented.A small portion of metal is exhausted during this process.This is used for Medium voltages.ACB is in low voltages.Here air is the quenching medium.

please give me all the Alarm .Trip ,Safety Relays & Conditions of Diesel-generators mail me on ashokbabunhce@gmail.com

1961

---

What is T’Q and X’Q and X’D ? and what is saturated as well as unsaturated ?

1780

---

sir iam from electrical and electronics branch ,can i appear for the hpcl offline requirtment? if yes please mail me on vikram_raju25@yahoo.co.in

2021

---

why capacitance effect is predominant in underground cable transmission and inductance effect is predominant in over head line transmission?

3671

---

i want design of D.C.MOTOR 1HP 960RPM AND 2HP 960RPM ITS URRGENT

1950

---

What is the requirement of grounding the neutral of single phase generators on load? If the neutral is not grounded, what will be the effect?

2104

---

Why is ignitor used in sodium vapour lamp

3546

---

how to define tell me about self

1991

---

How PSV sizing being done

2318

---

what is difference between elr and R eartl realy.

2629

---

How to decide cable tray size?

1137

---

i m in need of current rating chart of heavy duty pvc/xlpe, cu/al cables. can somebody provide me? if yes, plz send me at ashish_patel111@yahoo.com

2004

---

In Power cable specification what is U0/U and Um.

3792

---

operation of diesel generator

2024

---

specific difference of ICT&Auto Transformer

1883

---