Why is better to have a minimum ceiling voltage of 250% than 160%?

1791

---

For a 6.6kV Motor it is recommended to do megger test with 500 V d.c and not more than 5kV d.c but the Hi voltage withstand test should be performed by 12kV AC. Why the dc voltage test should be limited but AC voltage withstand test could be with such a high voltage?

2275

---

how to determine motor size for a fan application?

2230

---

Is better to supply the voltage for static exciter from the auxiliary power source or from the SG terminals? And why?

1878

---

sir tell me the formula for calculating the volume of 380mm dia double under reamed pile of 4.0 mts depth.

1937

---

what is the hanekom repairing material after concreting work

2340

---

what should be the finish work of a carpenter per day

2077

---

-/5A. What is the meaning and limitations of this in energy meter constant. It is a 3 phase LT Energy Meter. If this Energy Meter is connected through a CT of ratio 200/5 Amps, then what is the multiplying constant and how its will be calculated.

2374

---

why does bitumen heated from top side bt not from bottom side€

2380

---

In HVDC LINE RECTIFIER CONTROL ON CONSTANT CURRENT AND INVERTER CONTROL CONSTANT EXITATION ANGLE CONTROL BUT HOW INVERTER CONTROL CONSTANT CURRENT?

1903

---

How can we measure earthing resistance test (Earth meggar) of Transformer neutral pit while in live condition?.

2066

---

why do we use spark detector inside the slip ring brush compartment 0ona slip ring induction motor?

2033

---

How we can come to know the substation range,without go through any name plate ?

2057

---

why we have to particulary use ACB for below ratings,even available of MCB,MCCB with that range ?

2874

---

How can we find the breaking capacity of a Load breaker switch (LBS) fed from 11 kv supply??ex:50KA, 26kA etc???detailed step vice answer pls.

1967

---