Answer / jayaprakash.s

In motorised meggers,firstly we are generating an ac
voltage of low magnitude by a generator action.then its
volt. is raised by a tran'mer, rectified to dc by a
rectifier ckt. and its magnitude is raised by a voltage
doubler ckt. and is raised about 1000v or much higher.but
it has less current rating.

Answer / k.prakashchandra

It is a megger driven by a motor ,very useful in measuring
the PI value

when we change tha taps from 1-16 in 100mva tr whether a constant voltage avaliable till it reaches tap 16 or voltage change as per taps change

1 Answers  

---

What is reverse power relay?

0 Answers  

---

WHY WE ARE DOING THE EARTHING IN A SYSTEM. SOME PEOPLE ARE TELLING FOR PROTECTION. WHAT PROTECTION GIVE ME THE CORRECT ANSWER.

2 Answers  

---

Which type of DC generator is used for electric welding purposes and why?

1 Answers  

---

Why the arms of delta in a delta-wye power transmission system are kept constant??

0 Answers  

---

What is the lower limit of break-down voltage of converter transformer.

0 Answers   Tata Steel Limited,

---

what is the earthing condition between earth & phase.

3 Answers   ABB,

---

why commutator are not used in rectification purpose in power electronics?

1 Answers  

---

How much amperes needed for starting of 4HP motor?

1 Answers   CM Smith Sons,

---

What are types of encoders?

19 Answers   ITC Infotech, UFO, Wipro,

---

how much current in live 11 Kv distribution Line?

1 Answers   ABB,

---

I have made a 3 phase thyristor full bridge rectifier. But at the moment it is working only for the half bridge operation. Both the half bridges are on operation separately but when i put it into full bridge operation the oscilloscope output is zero. I rechecked that the pulses are correct for each thyristor. what could be the possible reason for this?

0 Answers  

---