Harmonic monitor and protection module

Details Harmonic monitor and protection module Harmonic monitor and protection module

1991-10-17

1994-06-07

DeBoer, Todd

Electricity: electrical systems and devices

Safety and protection of systems and devices

With tuned circuit

361 36, H02H 904

Patent

active

053195132

ABSTRACT:
A monitoring apparatus for a tuned harmonic filter is provided to prevent electrical system and filter damage. A tuned harmonic filter is provided in an electrical system to prevent overheating, motor damage, flickering lights, capacitor failure, etc. The present invention provides a sensing device in conjunction with the filter reactor to provide a signal indicative of the true operating condition of the filter. A monitoring circuit compares the signal with normal operating conditions of the filter to determine if a "fault" is occurring. Timing devices provide for a delay or rapid disconnection of the filter and/or electrical system. Indicator devices are provided to aid in diagnostic analysis of an electrical system. A remote indicator device may be included.

REFERENCES:
patent: 3200392 (1965-08-01), Chumakou
patent: 4142151 (1979-02-01), Hansen
patent: 4419660 (1983-12-01), Bergdahl
patent: 4470091 (1984-09-01), Sun et al.
patent: 4477854 (1984-10-01), Usui et al.
patent: 4590533 (1986-05-01), Murata
patent: 4845435 (1989-07-01), Bohan, Jr.
patent: 4967334 (1990-10-01), Cook et al.
patent: 4972153 (1990-11-01), Zucker et al.

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