Answer / eee

the purpose of antipumping rly is to prevent closing of CB
when its already closed.the CB's have auxillary contact NO and
closes when CB is closed and thus energises antipumping...
antipumping has conatcts in series with closing coil of CB,
its NC n thus opens when energised.......cutting power supply
to closing coil.......

Answer / vinod

Antipumping relay prevent contious close and trip of
breaker when trip command exist.ie only one close with
single command, remaining answer is same as Sl.no 1

what is the principle of tubelight ??? what is the function of starter and choke ???

1 Answers  

---

What is acsr cable and where we use it?

0 Answers  

---

If a manufacturer decribes a power supply transformer as providing a secondary voltage of 24 volts when connected to a 240 volts supply, do you think they are refering to the full load or no load secondary voltage?

3 Answers  

---

A long transmission line is limited by - a)thermal limited b)voltage limited c)stability limited d) L,C limited please explain with proper reason.

1 Answers  

---

what are the functions of power modulator?

4 Answers  

---

explain working principle of earth leakage relay

0 Answers   Divis Laboratories, SMIORE,

---

How to connect a Restricted earth fault relay for 2000KVA,11/0.433 KV Distribution Transformer and What is the neutral CT ratio should be selelcted for 2000 MVA Transformer for estabilishing the Restricted earth fault relay

1 Answers  

---

how we can calculate LT side current of transformer

2 Answers   L&T,

---

what is function and advantage of double delta winding in induction generator?

1 Answers  

---

As load in a transformer increases, mutual flux linkage in core= A increases B decreases C not change D first increase then decrease

2 Answers  

---

WHY EARTHING NOT NEEDED IN BATTERY IN SUBSTATION?

5 Answers   L&T,

---

what are the usual topology of transformers at different substations in the power system and why that particular topology is choosen. what are the limitaions of that topology?

0 Answers  

---