(19)
(11) EP 0 202 200 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
30.11.1988 Bulletin 1988/48

(43) Date of publication A2:
20.11.1986 Bulletin 1986/47

(21) Application number: 86830103

(22) Date of filing: 02.05.1986
(84) Designated Contracting States:
AT BE CH DE FR GB LI LU NL SE

(30) Priority: 09.05.1985 IT 1248985

(71) Applicant: ESACONTROL S.p.A.
 ()

(72) Inventor:
  • Ripamonti, Paolo
     ()

   


(54) Device for the protection of track relays from electrical disturbances


(57) The object of the invention is a device for protecting track relays (9), controlled by two voltages V, and VL having a phase difference of 90°, utilized in so-called "single-track" track circuits.
According to the invention, the supply voltage VC applied to the track circuit and the local voltage VL applied to the track relay (9) are supplied through polarity change switches CC and CL.






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