Rolating actuator for circuit breakers suited for in advance actuation of an undervoltage tripping unit

(19)

(11)

EP 1 128 412 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	02.01.2004 Bulletin 2004/01

(43)	Date of publication A2:
	29.08.2001 Bulletin 2001/35

(21)	Application number: 01200447.9

(22)	Date of filing: 08.02.2001

(51)	International Patent Classification (IPC)⁷: H01H 83/12

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
	Designated Extension States:
	AL LT LV MK RO SI

(30)

Priority:

23.02.2000 IT MI000325

(71)	Applicant: GE Power Controls Italia S.p.a.
	I-20144 Milan (IT)

(72)	Inventors:
	Letient, Patrick 02100 Saint-Quentin (FR) De Vizzi, Francesco 20098 San Giuliano Milanese (Milan) (IT) Falchi, Fiorino 10090 San Gano (Torino) (IT)

(74)	Representative: Michelotti, Giuliano et al
	DRAGOTTI & ASSOCIATI SRL, Galleria San Babila, 4/C 20122 Milano 20122 Milano (IT)

(54)	Rolating actuator for circuit breakers suited for in advance actuation of an undervoltage tripping unit

(57) Rotating actuator of a molded case circuit breaker comprising a disk (14), moved by a shaft (12) of a rotating knob, which is provided with a slot (16), bounded by a protruding cam (18) actuating a lever (48) engaged in a slot (54) of a slider (56) having the duty of actuating the contacts of a auxiliary contact unit (60) of the circuit breaker to the purpose of feeding an undervoltage tripping unit thereof before the beginning of a closing operation of the circuit breaker and of preventing an unwanted tripping of the circuit breaker due to lack of voltage on the same undervoltage tripping unit.

Search report