Answer / guest

IGBT - insulated gate bipolar transistor

Answer / abdul

IGBT - Insulation gate bipolar transistor is a high speed
switching device used in dc applications.

TRIAC - Triode for alternating current is a device use to
switch AC devices like lamps, motors etc,by taking a small
amount of dc i/p through its gate terminal.

Answer / mailsamy

Switching time, construction wise

Why generation voltage in thermal power plant is between 11kv to 33kv?

0 Answers  

---

WHAT IS LINIER MOTOR?

4 Answers   BSNL, wbsedcl,

---

what happens if DC earthing and AC earthings are shorted?

1 Answers  

---

How many points can we have in AC Circuit? Show by giving suitable example?

3 Answers  

---

What is the principle of residual protection?

0 Answers  

---

21. What is the purpose of taking Capacitance and Tan Delta Test in Transformer bushing? 22. What are the protections to be used for Generator? 23. Draw the vector diagram and condition for the following: 1) Dyn1 2) Ynd0 3) YnYn0 24. What happens when the polarity changes in CT? Explain briefly? 25. Explain the Term in CT Name Plate – Class: 5P10

3 Answers  

---

what is cascade speed control device?and how this device control the speed of motors?

0 Answers   ABB,

---

why we use low kv lightining arrester in line for example 9 kv using in 11kv

1 Answers  

---

The electrical energy required to raise the tempreture of a given amount water is 200 kwh. If the heat losses are 20%, the energy required is?

0 Answers  

---

In all analog voltmeters or ammeter showing some small size symbols. as well as a star and in star 2no. digit, resister symbol,and other. what is that's meaning ?

0 Answers  

---

When VFD is connected to a 3 phase main supply there is load current difference between incomer to VFD and outgoing from VFD.

1 Answers   Shasun Chemicals,

---

Define heating time constant of electric motor.

3 Answers  

---