Track circuit equipment alarm circuit troubleshooting method

• Main Authors: LUAN YEHUI, GAO XU, PAN DENG, CAI JIYUAN, HAO XUEQIANG, ZHAO JUN, ZHAO ZHILEI, HU JUNHE
• Format: Patent
• Language: Chinese; English
• Published: 18.04.2023
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

A track circuit equipment alarm circuit troubleshooting method belongs to the technical field of railway signals, and comprises the following steps: step 1, testing an external power supply circuit of an alarm relay: leading a track circuit alarm relay driving line and a driving loop into positive and negative electrodes of a 24V direct current power supply for a track circuit cabinet; step 2, testing an attenuation internal drive circuit of the alarm relay: performing short-circuit conduction on an optocoupler drive circuit part in an alarm circuit by using a short-circuit method; and step 3, testing an alarm relay optocoupler driving circuit: utilizing a short-circuit method to respectively lead the negative electricity of the 24V direct-current power supply of the track circuit cabinet to each optocoupler node of the track circuit alarm optocoupler driving circuit. According to the method, the track circuit alarm circuit fault can be quickly and accurately positioned, the working efficiency is improved, an