Answer / vinay sangwan

If we know the total impedance of the network then we can
calculate the short circuit current.

Answer / bala123

if we known the value of Z for total network we can by
below the formula,,,,,

Isc= Kva/1.732*v*Z%

Answer / mustafa

Isc= kva/ sys. impedence(Z)
IF THE "z" is 0 then imagine the the KA

I have a shop heater with a 1/3 hp capacitor start, induction motor driving the fan. Intermittently, the fan motor speeds up significantly for several seconds (15-60 sec) then slows to normal operating speed. The manufacturer suggested changing the capacitor which made no sense, but I did it to no avail. Could this possibly be caused by the centrifugal switch intermittently reconnecting the start winding?

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