Answer Posted / thiru

transformer differential protection does not operate when
there is out zone fault.because that time two sides of CT's
sense same current. there is no difference of current.so
the relay does not operate.

What is the range of the stator resistance of 3 phase induction motor?

1951

---

What is the difference between Delta & Wye windings?

2136

---

What are the advantages of autotransformer?

1256

---

what is the illumination level required for child play area?

2127

---

What should be the height of basement according to NBCC code?

2261

---

How can calculate the earthing strip of Copper/GI for rating of 30kV,discharge current 10KA Lightning arrester.

2386

---

1.what is the difference between transformer differential and busbar differential.2)why we are using 2 slope for trafo diif and 1 slope for busbar diff.3)what is the purpose of metrosil and stabilizing resistor in high impedance relay circuit.4)how metrosil reduce the peak volage.5)what is the funtion of stabilizing resistor

4928

---

When MICC cables used ?

2138

---

How does cost of generation from hydropower plant compare with other sources of electricity?

1113

---

In EDO ACBs what is a purpose of closing coil and motor, what is the operation of these devices are they inetconnected. means if we give supply to motor and by BCS we charge Closing coil,what exact is operation is and how it charge a spring of ACB. Sir if anybody has an wiring diagram please send me the link to operate and EDO breaker.

2206

---

we use 400/5A ct and 35/roor3KV,/0.1/root3KV,0.1/root3KV pt ratio. What is the multiple factor of this meter.

2058

---

What is meant by derating factor?

1286

---

Why neutral is not used in three phases dol starter

1995

---

How to know vacuum in vacuum cylinder of breaker in working condition

2001

---

which mm cable should be used for 1.hp immersible pump motor for the distance of 330 metres?

1747

---