Electricity: electrical systems and devices – Control circuits for electromagnetic devices – For relays or solenoids
Patent
1996-06-28
1999-05-25
Leja, Ronald W.
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
For relays or solenoids
H01H 4704
Patent
active
059074671
ABSTRACT:
An under voltage trip device for low and medium voltage breakers is disclosed. A first power supply receives unregulated power from a control voltage supply which is rectified and regulated with portions of the power supply monitored by a processor. The output of the first power supply is supplied to a second power supply which allows pulsing modulating power to be supplied to a solenoid connected thereto. The current supplied to the solenoid is measured and calculated by the processor and stored therein as well as being compared to stored values, thereby determining solenoid armature position and predicting or warning of solenoid failure. Connected to the second power supply is a third power supply which operates in a voltage regulator supply mode and a switcher mode during start-up and continuous running operation respectively, such mode being controlled by the processor. Switches are connected to the processor so that multiple control voltage sources may be selected as well as adjusting the delay time and pick-up or drop-out points with respect to the control voltage in order to determine operation of the solenoid and the position and condition of the solenoid armature and coil. The solenoid is pulsed with higher than rated voltages in order to firmly lock in the solenoid and to delay its decay during an undervoltage condition from the control power.
REFERENCES:
patent: 3873847 (1975-03-01), Finch et al.
patent: 3936701 (1976-02-01), Wilson et al.
patent: 4183071 (1980-01-01), Russell
patent: 4331996 (1982-05-01), Matsko et al.
patent: 4675776 (1987-06-01), Howell
patent: 4683529 (1987-07-01), Bucher, II
patent: 4797541 (1989-01-01), Billings et al.
patent: 4797779 (1989-01-01), Richards et al.
patent: 5053911 (1991-10-01), Kopec et al.
patent: 5138249 (1992-08-01), Capel
patent: 5191302 (1993-03-01), Rossnick
patent: 5394291 (1995-02-01), Janke et al.
patent: 5457622 (1995-10-01), Arakawa
patent: 5489837 (1996-02-01), Arakawa
patent: 5502630 (1996-03-01), Rokhvarg
patent: 5539608 (1996-07-01), Hurley et al.
patent: 5546268 (1996-08-01), Hurley et al.
Leja Ronald W.
Siemens Energy & Automation Inc.
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