Re: Can you identify this "pole transformer" looking thing . . .????

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "by way of Terry Fritz <teslalist-at-qwest-dot-net>" <dhmccauley-at-spacecatlighting-dot-com>

Cool.  Thanks for the info.  Maybe I should get one of those too for my
collection!!!!

Dan


 > Hi Dan,
 >
 > Those are oil-immersed motor-driven relays used to switch the PFC
capacitor
 > bank into/out of the circuit as necessary. Some distribution lines
 > experience fluctuating inductive loads (office buildings or stores with
 > fluorescent lighting, large industrial motors, etc.) that introduce
voltage
 > sags from lagging power factor only some of the time. To improve voltage
 > regulation and power distribution efficiency on these lines, the power
 > company often installs a switchable capacitor bank in conjunction with
 > sensing circuitry. When the distribution feeder's voltage sags due to an
 > increasingly lagging power factor, the relays connect the capacitor bank
to
 > compensate. A small step down transformer provides LV power for these
relays.
 >
 > Best regards,
 >
 > -- Bert --
 >