Transient free solid state automatic power factor correction

Details Transient free solid state automatic power factor correction Transient free solid state automatic power factor correction

1985-03-13

1987-02-24

Wong, Peter S.

Electricity: power supply or regulation systems

For reactive power control

Using impedance

323235, 323910, G05F 170, H02J 318

Patent

active

046459979

ABSTRACT:
In an apparatus for controlling the power factor of a power distribution system connected to inductive loads, banks of delta connected capacitors are added to or removed from the power lines of the power distribution system by a plurality of solid state switching devices which are under the control of a microprocessor. The solid state switching devices include optically isolated SCR devices that do not generate electrical interference and provide transient free operation. The microprocessor is also capable of calculating the power factor and displaying it on a digital readout.

REFERENCES:
patent: 4055795 (1977-10-01), Mathieu
patent: 4348631 (1982-09-01), Gyugyi et al.
patent: 4356440 (1982-10-01), Curtiss et al.
patent: 4365190 (1982-12-01), Pasternack et al.
"A System for the Automatic Correction of Electrical Power Factor", Lunsford Systems, Inc., brochure.

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