MECANISMO DE PARADA AJUSTAVEL PARA UNIDADE DE DESENGATE TERMICO PARA DISJUNTORES

MECANISMO DE PARADA AJUSTAVEL PARA UNIDADE DE DESENGATE TERMICO PARA DISJUNTORES

Apparatus for adjusting the calibration of a thermal trip unit (2) which is to be used in conjunction with an electrical circuit breaker. A rotatable knob (74) is provided which adjusts the trip unit (2) to between one hundred percent of the rating of the circuit breaker and some value which is less...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: JAMES NORMAN ALTENHOF, JR, JOHN KEITH LIVERSEY
Format: Patent
Sprache:por
Schlagworte:
BASIC ELECTRIC ELEMENTS
ELECTRIC SWITCHES
ELECTRICITY
EMERGENCY PROTECTIVE DEVICES
RELAYS
SELECTORS
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Beschreibung
Zusammenfassung:Apparatus for adjusting the calibration of a thermal trip unit (2) which is to be used in conjunction with an electrical circuit breaker. A rotatable knob (74) is provided which adjusts the trip unit (2) to between one hundred percent of the rating of the circuit breaker and some value which is less than one hundred percent. An adjustable stop screw (84) is provided to engage the rotatable knob (74) when the knob (74) is rotated to adjust the oalibration of the trip unit to the desired value which is less than one hundred percent of the rating of the breaker. The adjustable stop screw (84) thereby limits travel of the adjustable knob between only one hundred percent of the rating of the circuit breaker and the desired value which is less than one hundred percent.