(19)
(11) EP 0 534 572 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
16.06.1993 Bulletin 1993/24

(43) Date of publication A2:
31.03.1993 Bulletin 1993/13

(21) Application number: 92202963.2

(22) Date of filing: 25.09.1992
(51) International Patent Classification (IPC)5: H01H 51/22, H01H 50/58, H01H 1/54, H01H 73/00, H01H 1/58
(84) Designated Contracting States:
AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE

(30) Priority: 26.09.1991 NL 9101630

(71) Applicant: HOLEC SYSTEMEN EN COMPONENTEN B.V.
NL-7556 BH Hengelo (NL)

(72) Inventors:
  • Van de Ven, Nico Jan
    NL-7552 JB Hengelo (NL)
  • Kippers, Mannes
    NL-7642 VK Wierden (NL)

(74) Representative: de Bruijn, Leendert C. et al
Nederlandsch Octrooibureau P.O. Box 29720
2502 LS Den Haag
2502 LS Den Haag (NL)


(56) References cited: : 
   
       


    (54) Bistable electrical relay


    (57) Bistable electrical relay (1) comprising a first contact (13), a movably mounted, essentially rigid arm (4) coupled thereto and provided with a first connecting point (14, 15, 16), and a second contact (12) coupled to an immovably mounted further arm (11) which is provided with a second connecting point (17, 18). To operate the contacts, electromagnetic drive means (9) are provided which act on the movable arm via spring means (5) for producing contact force. To keep the contacts closed, the drive means are provided with permanent magnets (20), while further spring means (6) act on the movable arm to keep the contacts open. Preferably, leaf springs are used, the two arms being mounted in close proximity in order to make use of the Lorentz force to produce additional contact force in the case of short-circuit currents. A switching module comprising bistable relays is also provided for switching group connecting points in an electrical power installation.






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