Answer Posted / murtaza

keeping in view power triangle formula
kvar= APPARENT POWER* power factor
L

What are differences between Voltage, EMF & Potential difference ?

2001

---

I have a small system with two motors that are running on 380 vac, 60 hz. These motors are expensive and I usally get them from Brazil. I am adding another motor to the system, but I want to purchase a 480 vac, 60 hz motor to use. It will be on a VFD that is rated fro 380 thru 480. Is this posible and will I have to use a larger motor and derate it?

1978

---

Which test will be more severe for VCB?

2660

---

Explain cos(theta) and Sin(theta)

2116

---

How u can give the overload setting to any motor protection relay for a HT motors with formula and Example?

2196

---

H.t motor 6600 volt to same motor lt supply 440volt supply applyed to h.t motor to effect....

1896

---

defination of controlled shunt reactor

2251

---

How to test the vector group of a Yd11 transformer? what are the relations to be checked between various vectors to confirm this vector group?

4479

---

what is a bus post insulator? explain its application in a substation.

12609

---

Earth leakage relay basic knowledge principle

2191

---

How to calculate Temp from Resister from PT100 equation,

1759

---

3Cx240 & 3Cx300 sqmm Al. cable from lv side. What is the calculation for this cable??

1412

---

WHAT IS THE FORMULA FOR CALCULATING CURRENT RATING(DIRECT IN GROUND OR AIR) OF ARMOURED(XLPE) CABLE OF 4C,16Sqmm?

2105

---

if a number of plc s are there then how many modbus to be used

1966

---

hi frnds what is meant by harmonics & what is meant by third hormonics,where its will occur ?thank u

2017

---