| 摘要 |
FIELD: railway transport; switches. ^ SUBSTANCE: invention can be used in signaling, interlocking and blocking equipment of railway transport. Proposed device has line conductors, electric drive 15 containing automatic change-over switch with operating contacts 15.2 and check contacts 15.1, reversing relay 14, polarized starting relay 3 and neutral starting relay 4, switch control single-pole relays, switch position control relay, transformers, diodes, capacitors, resistors, dc and ac supply sources. Leads of working windings of one and other single-pole switch control relays, respectively, 5.1 and 6.1, are connected through contacts of neutral starting relay to line conductors. Polarizing windings of both single-pole switch control relays are connected in parallel to relay supply source. Making contact of plus relay is connected in series with winding of switch position plus control relay and making contacts of one and other single-pole switch position control relay. Making contact of minus relay is connected in series with switch position minus control relay and making contacts of one and their single-pole switch position control relay. ^ EFFECT: improved reliability owing to prevention of false checking of switch position in case of confusing of line conducts and action of spark on commutator of motor of electric drive. ^ 4 cl, 3 dwg |
