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,

---

1.where in India the maximum transmission voltage is operated? 2.what the methods are used to cool down the transformer?give the specific ratings of the transformer & specific cooling process. 3.how zero & negative sequence reactances are formed in a rotating machine when fault occur in the system?

2 Answers   IES,

---

what is the use of the puls transformer in UPS & how it works???????????

0 Answers  

---

1kva = kw ?

6 Answers  

---

What's ND relay & it's functions?

2 Answers  

---

---

what is the safty of poly phase tranformer?

0 Answers   Adani,

---

Why capacitor is blow when I am starting motor ?

1 Answers  

---

what will happen if field winding of Synchronous generators given ac supply

4 Answers  

---

one kva is equal to how much amps?

14 Answers  

---

define power quality

1 Answers  

---

how to meas-our losses for L.T & H.T

0 Answers  

---

How will polarity test of Dy5 Transformer ?

0 Answers  

---