Protective device for a controlling system of a sewage pump

Details Protective device for a controlling system of a sewage pump Protective device for a controlling system of a sewage pump

2007-01-03

2009-02-10

Leykin, Rita (Department: 2837)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Motor protective condition responsive circuits

C361S001000, C361S023000, C361S089000, C318S432000, C318S434000, C417S045000, C323S267000

Reexamination Certificate

active

07489484

ABSTRACT:
A protective device for a controlling system of a sewage pump has a protective circuit to protect a start capacitor and to avoid the start capacitor from burnout when an overload is occurred by actuating power source (ON status) or a transient voltage is occurred by malfunction of a controlling circuit. Therefore, the start capacitor is certainly protected and significantly improved in lifespan.

REFERENCES:
patent: 4422030 (1983-12-01), McAllise
patent: 4511312 (1985-04-01), Hartwig
patent: 4822331 (1989-04-01), Taylor
patent: 5077512 (1991-12-01), Weber
patent: 5280227 (1994-01-01), Bashark
patent: 5345126 (1994-09-01), Bunch
patent: 5808441 (1998-09-01), Nehring
patent: 6756756 (2004-06-01), Chmiel et al.
patent: 2003/0206804 (2003-11-01), Smith

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