Answer / sugun_eee

Deffinetly VFD can step up 60Hz with the given 50Hz or any
other rated input frequency. But the motor wich is driven
by that VFD shoud be raed for such high speeds or
frequencies.

Answer / srinivasa rao talasila

VFD is designed to give a out put frequency of 1Hz to 600
Hz but our connected load has to with stand.

In our plant we are running the german motor name plate RPM
1775 at 60Hz but we are running the same at 87Hz RPM 2610.

In above case also bearing capacity to withstand such high
rpm and current of the motor should be with in the name
plate limits.

Answer / rahul waghmare

VFD can be vary upto 80hz but we need to set the limits
into parameter settings.

On what basis do you decide the ONAN (Oil Natural air natural) or Dry type transformer for a project?

0 Answers   Semac,

---

what is the difference between OSR and BUCHHOLZ relay of transformer?

1 Answers   Bhushan Power Steel,

---

definition of fault level in powersystems?

4 Answers  

---

What are the significant parts of dc generator?

0 Answers  

---

What is stepper motor?

0 Answers  

---

which motor is used in our Indian Ceiling fan -Capacitor start and run or Capacitor start? (during repair i saw only one capacitor so it should be start only)

5 Answers   ABB, Bajaj Electricals, Power Grid, Ruchi Soya, Suzuki,

---

Abb 11kv how it is closing automatically when the cb is racking in and rack out when it reaching test position

1 Answers  

---

WHY WE DO NOT TAKE THE POWER FACTOR MORE NEARER TO UNITY IN AC GENERATOR?

1 Answers  

---

100 MVA 3-phase alternator with earthed neutral has a reactance of 5 ohms per phase. what will be the fault MVA of generator.

0 Answers  

---

How many types of lightings are there

2 Answers   ABB, Met Trade,

---

what happen if we give 220 volts dc supply to d bulb r tube light?

9 Answers   NHPC,

---

how to set relay setting? and example calculation...

0 Answers   JSW,

---