What is the unit of inertia constant of rotating machines?
Which has more inertia constant between turboalternator and
hydroaltermanor and why?

Answer Posted / iamdon

Inertia constant has unit of second(joule/VA).

Turboalternator has higher inertia constant in the range of
3-9 sec where as hydro alternator has inertia constant of 2
sec.
This variation is because in the case of turbo alternators
more then one(3 to 4) stages are connected to obtain high
mechanical input to alternator.Each stage has high rotating
mass.So more inertia constant.

Author:arbelectbit@yahoo.com

Is This Answer Correct ?    6 Yes 7 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

Please explain me about Relay curves and their sources to read ?

1355


what is the reason for indication of light in the earth lamps of main switchboard.if there is an earth why does one lamp get dim and the other two bright.

1869


What is the reason that the humming sound is coming from the induction furnace panel?

2074


we have require a Motor (1500kW, 6.6kV, 50Hz) which shall operate at 1500rpm during 30min and after it shall run on 500rpm during 15min. The same cycle shall be repetitive during the whole working days. Which method is best and economic to achieve such type of task. VFD, VVFD, Pole changing motor etc.

1476


Describe the colour rendering properties of i) tungsten filament lamps ii) tubular fluorescent lamp

2610






sir,in our plant we r using SATEC PM172E power reading meeters in HT panel side it is monitoring the MB data smart viewer(sever).but last one week we did not get readings inthe server only available in meeter.tell me how communicate meter and server. and also what steps we take for checking.

1775


how is capacitor bank look like

1917


What is the basic principle of welding process?

1664


how to calculate slip ring induction motor stator and rotor currents??

1711


Is a contactor (or master relay) required between incoming lines and a VFD? The question goes to safety. If a contactor were used before the VFD and an e-stop engaged then the motor will coast to a stop (i.e. VFD loses power) instead of stopping much faster if the VFD braking fucntion were used. It would make more sense to keep power on the VFD.

1545


Is there any Electrical supervisor license which gives permit to work whole India rather than individual state??

1379


Explain advantages of storage batteries

632


what is magnetizing and demagnetizing current in generator and motor?

2727


regarding safety what would u consider the most important rules to observe when inspecting electrical equipment?

1564


Why did lightening arrestor solid copper rod head is sharp on mobile tower top?

1528