关键词: ZDJ9交流转辙机, 控制电路, 道岔失表故障, 电路优化

Abstract: The ZDJ9 AC five-wire switch control circuits exhibit the phenomena of arcing, burning, and oxidation of the first and second groups of strengthening contacts of the 2DQJ relays, resulting in poor contact of the contacts. Due to the fact that the first group of front contacts and the second group of rear contacts of 2DQJ relays are shared contacts, oxidation of these contacts can lead to loss of indication of a switch ; at the same time, there is a risk of instantaneous starting current striking and damaging outdoor diodes, which can also lead to loss of indication of a switch. The principle of the switch control circuits is analyzed, the circuit logic is adjusted, and the ZDJ9 AC five-wire switch control circuits are optimized to avoid loss of switch indication failure and improve the overall reliability of the switch equipment.

Key words: ZDJ9 AC switch machine, control circuit, loss of indication of a switch, circuit optimization