Answer / shankar

by using a capacitor and rely
or by using 555 timer
or by using two transister

Answer / manish kumar janagal

also by using a 1 phase alternator connected to 1-phase
supply in such a way that it's frequency is just less than
the supply frequency

how netral CT is selected (including its details specification)

8 Answers   ABB, ABC, dbpl, Mecon, Shree Engineering, Tapasya Transformers,

---

how define the torque in ac drive. from electrical side in the drive friquency ,voltage and current three factor is there.

0 Answers  

---

why two contacts(in series) are using in closing circuit

3 Answers  

---

how to calculate the power factor when instantaneous voltage and current has harmonics in it ?

0 Answers   Sandhar,

---

We have 250 KW x 2 motors, which are load from 25% to 100% varying load in every minute , so how can we compansate the power factor. pl give your opinions on the above subject.

0 Answers  

---

how the testing of protection CT Testing done through Primary injection kit please describe in detail procedure...

0 Answers  

---

how to find the ballast lost from the actual wattage? for example i am going to buy decorative type 2x36watts fluorescent light fitting for this lamp how to find the ballast lost? is there any formula?

2 Answers   MEIL,

---

how to calculate cooling requirement of datacentre from electrical load?

0 Answers  

---

suppose we using 3 phase motor of 440 v means what range of C.T. is require for measuring current , the rating of motor is 1HP ?

5 Answers  

---

What are instrument transformers?

6 Answers  

---

Write down the brushes of a de machine.

0 Answers  

---

During he starting up of the motor, the upstream's MCCB (350A) always trips due to the UVT relay activated. Can Star-delta starter use for a 20kW Motor (For a powder mixer machine) cause voltage-dip in the supply line voltage? If so, what are the recommended solution to eliminate/reduce the transient voltage dip in the line voltage?

4 Answers  

---