Answer / karna

Actually in Breakers Closing coil and Trip coil are
operated on Pulse command (i.e just initaion is enough,
continous supply not required). Anitpuming Means once the
breaker is colsed ,again if anyone ( Auto Command, Through
TNC switch ) can close it will not close because in closing
circuit Antipuming NC will be in series, Once the breaker
close means antipuming will activate unitll trip command
given by us.

Tripping coil plays major role in Circuit brakers, because
if any faults ( i.e O/L, E/L, short Circuit etc..)occur
breakers has to tirp. For trip we can do manaully at any
time.

Answer / k.prakashchandra

Closing is on command and tripping is either on command or
auto .You are testing the circuit by closing the CB using
the control switch

where is used dc volage transformer,and what is highest capacity of transformer

2 Answers  

---

difference between high and low impedance BUS BAR relay??

0 Answers  

---

why dc exicitaion used in ac motor....?

2 Answers  

---

How do i perform grounding of star point of Genset (400V) for making connection with step up transformer of DELTA-DELTA (400V to 20KV) ? while Genset itself has its own neutral and grounding bus bar inside genset breaker box whereas we have another neutral and grounding busbar in synchronizing panel next to genset at maximum distance of 6meter, would someone pls advice if we can only perform neutral grounding in synchronizing panel or should we ground neutral on both places inside genset breaker box and synchronizing panel.

0 Answers   Allied Group,

---

What are the no-load losses for the 11000/415V transformer with the following rated capacity? 1.1500 kVA 2. 2000 kVA 3. 2500 kVA 4. 3000 kVA

0 Answers  

---

what is difference between earthingpits,earthing grid & earthing mess?

0 Answers   TATA,

---

what is difference between c-power & u-power air circuit breaker?

2 Answers   Areva, IIT, Marine Electricals,

---

HOW CIRCUIT BREAKER RATING CALCULATED?WHAT ARE THE PARAMETERS CONSIDERED?

5 Answers  

---

How can we step up ac and dc ?

1 Answers  

---

capacitor is load free component but why ampare meter shows current when capacitor bank breaker close?

5 Answers   Bhel, OPS,

---

my company total load is 1000kw, 415volt, all load are inductive load. incoming powerfactor is .8. we want to have0.95 pf connecting capacitors. so now how much rating of capacitors we have to connect? show how?

3 Answers  

---

What is the role of ESP(Electro Static Precipitator)in steam power plants? Where it is located? How it works?

1 Answers  

---