Answer / mpn

Switching is done by closing the apropriate contactor in
the circuit. Suppose you have a 30 KVAR capacitor bank, a
40 KVAR capacitor bank and a 50 KVAR capacitor bank. Each
will have a contactor in the circuit. If you want only the
30 KVAR capacitor bank in the circuit, you close only that
paricular contactor. If you want 90 KVAR, you close the
contactor for 40 KVAR and 50 KVAR banks.
Also, please note that there is a mistake in your question.
Nobody will use capacitor bank for reducing the pf. It is
used for improving the pf.

Answer / karthikeyan

by using automatic power factor controller it can be
acheived.

whenever any squirrel or a crow falls on the transformer input line then there is a big explosion and 440 volts of power is being discharged through the neutral line due to which appliances in off mode are also burned.we have earthing for the transformer as well as the bus bar chamber.why is it happening?

1 Answers  

---

What is expand formation of AYFY cable

2 Answers   HP,

---

why elcb used in circuit

4 Answers   ABB,

---

How to calculate approximate load loss of a distribution transformer by knowing %ge imp of transformer?

0 Answers  

---

What is Class and accuracy in CTs? Types of Classes and important of Classes?

2 Answers  

---

---

If Earthing is poor in a DB of of Residential Building, will residents feel a leakage voltage in a Electrical Ssytem? is this statement true?

1 Answers   Dolphin International,

---

What is transmittance?

0 Answers  

---

why the power factor is low at no load?

1 Answers  

---

where we use the SFU & FSU?

0 Answers   L&T,

---

how to calculate H.P of a moter from speed of a moter?

5 Answers  

---

Why front mounted CT polarities are always towards breaker?

0 Answers  

---

i have ht transformer of 142 kva with air cooled facility,having secondary voltage 7850volt, and secondary connected full way bridge rectifier .i faced the problem repeatedly that transformer one coil and rectifier diode of two phase was burnt two times. i checked all the secondary ckt. no any short ckt found,then what will be the cause side

2 Answers   Modern Terry Towels,

---