Electricity: measuring and testing – Electromechanical switching device – Circuit breaker
Reexamination Certificate
2007-09-11
2007-09-11
Deb, Anjan (Department: 2858)
Electricity: measuring and testing
Electromechanical switching device
Circuit breaker
C324S555000
Reexamination Certificate
active
11216727
ABSTRACT:
A tester for testing a circuit breaker includes a plurality of load elements each having a nominal fixed impedance and an electronic switch associated with each load element. The electronic switch, when turned on, electrically connects a corresponding load element in series with a circuit breaker load terminal and in parallel with none or with a number of other load elements. A controller turns on a number of the electronic switches selected to draw through a corresponding number of the load elements a test current selected as a function of a designated rated current for the circuit breaker and sufficient to trip open the same. A pulse width modulation circuit cooperates with the controller and with the electronic switches. The pulse width modulation circuit provides a constant magnitude of the test current to accommodate variations of the nominal fixed impedance or variations of the voltage of the load terminal.
REFERENCES:
patent: 5416416 (1995-05-01), Bisher
patent: 5583440 (1996-12-01), Bisher
patent: 6072317 (2000-06-01), Mackenzie
patent: 6084756 (2000-07-01), Doring et al.
patent: 6466029 (2002-10-01), Stroth et al.
patent: 6734682 (2004-05-01), Tallman et al.
patent: 6744260 (2004-06-01), Schmalz et al.
patent: 6765390 (2004-07-01), Elms
patent: 6785104 (2004-08-01), Tallman et al.
patent: 6850073 (2005-02-01), Elms et al.
patent: 2004/0218330 (2004-11-01), Natili et al.
patent: 2005/0089079 (2005-04-01), Engel
Benshoff Richard G.
Ellsworth Maurice R.
Gonyea Kevin D.
Lawton Jeffrey C.
Mills Patrick W.
Deb Anjan
Dole Timothy J
Eaton Corporation
Ūthoff, Jr. Loren H.
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