Safety device for lighting systems formed by a plurality of lamps connected in series

(19)

(11)

EP 0 944 295 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	23.08.2000 Bulletin 2000/34

(43)	Date of publication A2:
	22.09.1999 Bulletin 1999/38

(21)	Application number: 99104798.6

(22)	Date of filing: 11.03.1999

(51)	International Patent Classification (IPC)⁷: H05B 41/46, H05B 37/03, G01R 27/16, G01R 31/02, G01R 31/44

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

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Priority:

13.03.1998 IT BO980156

(71)	Applicant: O.C.E.M. S.P.A.
	40016 S. Giorgio di Piano (IT)

(72)	Inventor:
	Gianluigi, Basile 40050 Argelato (Bologna) (IT)

(74)	Representative: Dall'Olio, Giancarlo
	c/o INVENTION s.a.s., Via delle Armi, 1 40137 Bologna 40137 Bologna (IT)

(54)	Safety device for lighting systems formed by a plurality of lamps connected in series

(57) A lighting system formed by a plurality of lamps (3) connected in series according to a load mesh (3a) includes a safety device in which a first control switch (11) is connected in series with the load mesh (3a) and can take one of two characteristic positions, namely non-operative position (I) and operative position (O). A detection mesh (3b) is derived from the terminals of the control switch (11) upon connection therewith, that is established in phase relation with a corresponding operative configuration of position (O) of the control switch (11). A measuring device (90) detects the current in the circuit resulting from the series connection of the load mesh (3a) and detection mesh (3b).

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