Low-voltage transformer area fault diagnosis system

The present invention provides a low-voltage transformer area fault diagnosis system. Data control subsystems are arranged in various low-voltage transformer areas of a power distribution network; monitoring and diagnosis are carried out on parameters of the low-voltage transformer areas, such as three-phase voltage, three-phase current, frequency, power, oil temperature and switching quantity; when the monitored parameters exceed threshold values, an alarm is given; the time information of a Beidou clock source is obtained, so that the time of components within system time can be set in a unified manner; the data information of monitoring points in the monitored areas is organically integrated through the forms of lines, formulas, instruments, tables, graphs and numerical values; the integrated data information is outputted in a visualized manner, so that a data development trend chart can be formed; key parameters can be prominently projected onto a display platform; and when the data information in the monitoring points exceeds a threshold value, alarm filtering, alarm forwarding, alarm display, alarm query and alarm statistics related processing are carried out, and then, alarm information is stored timely and correctly.