The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 17, 1995
Filed:
Mar. 28, 1991
David A Leone, Lawrenceville, GA (US);
William A King, Lithonia, GA (US);
John L Culligan, Alpharetta, GA (US);
Siemens Energy & Automation, Inc., Alpharetta, GA (US);
Abstract
Apparatus for closing a circuit breaker of a circuit that carries a substantial current includes a terminals (W1, W2, W12, W13, W14) for connection to an available source of electric power. The electric power available is typically 24 VDC, 48 VDC, 125 VDC or 120 VAC. An actuator including an electric motor M and a solenoid S both designed to operate on 24 VDC first cocks charging springs and then releases the charging springs to close the circuit breaker. A controller including a microprocessor U3 is connected to and derives power from the connected terminals and produces a pulse width modulated control signal (RUN; CLOSE) for controlling the actuator. The duty cycle of the pulse width modulated signal is adjusted in relation to the electric power supplied by the selected source so that the power supplied to the motor and relay functions effectively as the required 24 VDC power. Sensors J1 sense the condition of the charging springs, a charging cam, the circuit breaker, etc., and prevent operation of the circuit breaker closing apparatus unless all conditions necessary to safe operation are satisfied.