I view a stalled motor as being similar to a transformer with the secondary
shorted. The current will be limited only by the winding resistances and the
leakage reactances. Surprisingly, the PF is only slightly lower at start-up.
Use caution when compensating PF of a motor that might sometimes look like a
generator (tower lowering). In those applications, the compensating capacitor
usually resides on the line side of the switch.
-Mike-
>________________________________
> From: Wilson <infomet@embarqmail.com>
>To: towertalk <towertalk@contesting.com>
>Sent:
>Subject: [TowerTalk] Wiring Sky Needle tower for 220 VAC
>
>
>I’m not sure of this, but the motor must be a seriously lagging current load.
>I wonder if some power factor correcting caps would get the sluggish motor
>going.
>With the lagging PF, you get the most drop when the supply voltage is already
>going pretty low...
>With correction, the caps would handle some of the load.
>WL
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