Answer / nikitha

Used in transmission lines;
near alternators and substations- non directional
else - directional

Answer / sheikh

Different kinds of over current relay are available.
on HT side over current relay is a part of protective relays.
and LT side over current relay are using in motor starter,
ACB. There are 2 type of over current relays used in motor
circuit one is thermal over load relay second one is EOCR
electronic over current relay etc.

A 400KVA transformer has 400 Hz frequency. If the frequency is changed to 50 Hz, then what will be the new KVA rating?

0 Answers   Spectrum,

---

what is the difference between ac and dc hipo test of cable?

2 Answers  

---

The sodium vapor lamp is not glows when it is connected a distance of 5 meters above from gearbox, why ?

0 Answers   Ispat,

---

a transformer runs by electro-induction principle like all motors.then why dosen't it rotate just like any other motor

2 Answers  

---

What is the ideal position cooling fan inside the dc motor?

0 Answers   Kay Bouvet,

---

---

Which type of a.c motor is used in the fan (ceiling fan, exhaust fan, pedestal fan, bracket fan etc) which are find in the houses ?

0 Answers  

---

Vibromotor 252MV 1/4HP2P..what is mean by 252MV?

0 Answers  

---

why we setting 95 deg and 105 deg in wti and oti of distibution transformer ? give the reson for that ?

0 Answers  

---

what is the difference between watts and volts?

2 Answers  

---

The exciting current of a transformer is non sinusoidal. why?

2 Answers  

---

Why high voltage lines (overhead ) are called high tension lines?

8 Answers  

---

Why we are measured insulation resistance applied through DC Voltage?

3 Answers  

---