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...

Suppose i Have an Ac motor of 25Hp 1500 Rpm 50 Hz Can i run a motor 2500 Rpm by AC drives by increasing a frequency either it safe or not ....

2 Answers  

---

Consider three heater bank connected in 3 phase star with neutral.Each heater bank connected in each phase.So each phase get 230 volts supply.my question is,during balance condition, current flow in neutral or Not

0 Answers  

---

Define maximum demand?

0 Answers  

---

what is the slip of synchronous motor

1 Answers  

---

What are the types of windings present in the ceiling fan? What winding will be effective first when we started the fan?What are the resistance and inductance ratios comparatively at the initial speed and full speed of the fan?

0 Answers   MIT,

---

our factory is going under construction mean time transformer 1000 kva 2 nos &load break swithch 12 kv & 4 nos 750 kva 2 nos & 380 kva 2 nos generator to be errcted.how to arrange earth pits &how to earth connect & neutral pit how to calculate in earth bit size.

0 Answers  

---

What is the difference between UPS and SMPS?

7 Answers   Mukand, NightFox,

---

to operate air conditioner of 1.5ton what power of generator is required

1 Answers   Bharat,

---

How much ph is maintained of water resistance starter for slipring induction motor ?

0 Answers  

---

If I want to replace a 26KW Slip ring Motor with a Squirrel Cage motor & Drive (for a Hoist Application). How can I approximate the Motor & Drive HP required in new Setup.

0 Answers  

---

In electric motors, according to the no. of compartments, The no. of input's (pantagraph collector's) were increased, why?

1 Answers  

---

what is the difference between ups & inverter

4 Answers   Cushman Wakefield, Dana Group,

---