Answer / moulali

chopper is a type of converter which converts fixed DC to VARIABLE DC.generally dc supply can't be step up or step down because transformer is the only device which is used to step up or step down the voltage/current, but by using choppers we can able to step up and step down the DC voltage/currents

what is the use of spst switch in performing experiment on self excited dc motor?

2 Answers  

---

power inverter we are using 2n3773 power transister in that places we can use any IGBT ?

1 Answers   Essar,

---

How harmonic block test are conducted on relays ( Siemens,Areva ect )power transformer using omicron kit?

0 Answers   Siemens,

---

Why we Specify Transformer rating 433 V Instead of 415V ?

8 Answers   ABB, ERA, Uddans,

---

1)how many types of earth? 2)how many types of megger and how to select that range? how much time taken for megger calibration( we r using megger)

1 Answers  

---

How to calculate rated currennt Of Mcb for 2hp motor...

3 Answers  

---

what is the capacitance of a single conductor

6 Answers   Bhel,

---

How the earth fault relay works please explain?????????

2 Answers  

---

is all the servo motors having brake?please specify which servo motors having brake for stop on position and which are not.

0 Answers  

---

why transformer rating is mentioned in kva?

1 Answers   JK Electric Works,

---

Please, if 1kw is equal to 1.25kva; how then do I know how many kva in 7.5kw?

0 Answers  

---

what happen if i change the polarity of ac when it is connected with motor

3 Answers  

---