Answer / guest

In transformers,
n2/n1=v2/v1
=>[n2/1000]=[400/200]
=>n2=2000

why the Parameters : Base Voltage & Maximum Voltage can't be equal in value in a VFD (Variable Frequency Drive) ? How much the base voltage would be lower than the maximum voltage ? If 400 V is the 3 phase output of a VFD ... then what should be the base voltage ? thanks a lot

1 Answers   Yaskawa,

---

while conducting an experiment why we connect the armature rheostat in maximum position and field rheostat in minimum position

1 Answers  

---

What is the breakdown voltage?

13 Answers  

---

i want to measure voltage difference between neutral and earth so i just simply use voltmeter. my question is that may i use this measure continuosly.or there are some electricity board restrication on that? or it creat some problem on my measuring device..?

2 Answers   NEEC,

---

Will The Rated Capacity of 20 MVA ,220/6.6 KV, ONAN cooling Power Tranformer be increased up to 25 MVA with respect to its %Impedence by ONAF cooling with same rating..?

2 Answers   Ambuja,

---

how to calculate short circuit current for the busbar

0 Answers   HMK,

---

In Power Line Communication (PLC) the wave trap is used to block communication signals from entering neighboring lines. My question is this: Why do they allow for different filtering arrangements on these wave traps? Isn't it always going to be a low pass filter since we want the power frequency to go through, and the comm signal blocked?

0 Answers  

---

can you give main difference between ELCB And RCCB?

38 Answers   MCB Bank, Reliance, Wipro,

---

What is the ideal power factor?

1 Answers  

---

What are the possible causes if load is not same on all the three phases

4 Answers  

---

hi can any body send me syllabus of rrb electrical section engg... and past pepar also of any board...

0 Answers  

---

I am applying for NTPC examination.Can we please provide previous paper to my mail prasad.chintala108340@gmail.com

0 Answers  

---