Answer / nanda

U can first measure the rotor speed at full load using a
tachometer..note down the Rated speed frm the panel board
and take it as NS.. rotor speed as NR.
Slip is equal to NS-NR/Ns....so the rotor freq Fr is
slip * AC supply frequency

Answer / manikiran

Frequency of a rotating machine can be found by Stroboscope..
It makes use of Stroboscopic Effect.When the frequency of
the Incident light is equal to the rotating speed (measured
as frequency of the point moving ) it appears to be
static...and the corresponding speed gives the speed of the
machine..
Or it can also be measured by a tachogenrator...

what will happen power cables laid without gap in underground

1 Answers  

---

how to calculate magnetic force genrated by a coil ?

0 Answers   L&T,

---

In what circumstanced the CT used for protection relay will be saturated?and what will happen to the relay is the CT is saturated?

3 Answers  

---

Explain about c.t?

0 Answers  

---

WILL THE PERCENTAGE IMPEDENCE FOR A ONAN TRANSFORMEER BE THE SAME COMPARED TO ONAF TRANSFORMER OF SAME RATING???

5 Answers  

---

Which motor runs on both ac and ac? a) dc series motor b) reluctance motor

2 Answers  

---

What is annunciator ?

1 Answers  

---

What is difference between Dy11 & Dyn11 vector group transformer. Can both these transformers operate in parrallel.

5 Answers   Jaypee, JOY,

---

Hello everyone, somebody knows what is a "surplice power" ? The hole phrase is: "This rating is appropriate for a generator set paralleled with an infinite bus e.g. a national electrical supply network or grid where the generator set is run at 100% load, 24 hours a day, 365 days a year and any surplice power is exported into the grid" Thanks in advance.

0 Answers  

---

In siemens PLC, why do we want to move the data ?

0 Answers  

---

I have 800 Amps MG Fix type breaker It is in on line & it has been given only UV (under voltage)coil connection for tripping purpose.now it is not working properly means its getting tripp so how can i replace it or how can i rectify the problem without destrubing my load??????????

2 Answers  

---

what is the applicatyons of the slipring motor and please tel me more about the slipring concept

1 Answers  

---