| 摘要 |
FIELD: railway transport; signalling system devices for ac track circuits. SUBSTANCE: two-element sector relay has cast iron housing 1 accommodating two electromagnetic elements - coils with cores of electrical steel: first (position) electromagnetic element 2 and second (track) electromagnetic element 3, movable sector 4 made of nonmagnetic metal secured in housing 1 on turnable axle between electromagnetic elements 2 and 3 and coupled with contact system also arranged in relay housing 1. It has also yoke with stop rollers 5 to limit turning of sector 4. Relay is furnished with the following new elements: two electrical steel plates 6 are secured in upper portion of sector 4 close to thrust section of sector, and permanent magnet 7 is secured at thrust roller 5 by means of special bracket 8. Plates 6 and permanent magnet 7 are arranged on one radius from axle of turning of sector 4. EFFECT: enhanced safety and reliability of phase-sensitive track circuits, increased relay reset factor, improved design. |
