Method and device for insulation monitoring including alarm diagnosis display

摘要

A method for processing and displaying insulation resistance values in insulation fault monitoring devices for an IT power supply system includes determining an insulation resistance value in predetermined time intervals, detecting an insulation fault if the determined resistance value falls below a preset limit value, showing an optical alarm message if the insulation fault is present, wherein the determined insulation resistance value is time stamped and stored, the time stamp marked as the alarm time upon detection of the insulation fault, after determining and storing n insulation resistance values following the alarm time, a number n of the insulation resistance values determined prior to the alarm time, the insulation resistance value determined at the alarm time and a number n of the insulation resistance values determined after the alarm time are copied into a cache and graphically displayed. An insulation monitoring device for an IT power supply system is also described

主权项

1. A method for processing and displaying insulation resistance values in insulation fault monitoring devices for an IT power supply system, comprising the method steps:
determining an insulation resistance value in predetermined time intervals, detecting an insulation fault, if the determined insulation resistance value falls below a preset limit value, showing an optical alarm message if the insulation fault is present,characterized in that
the determined insulation resistance value is provided with a time stamp and stored, the time stamp belonging to the determined insulation resistance value is marked as the alarm time upon detection of the insulation fault, after n insulation resistance values following the alarm time are determined and stored, a number n of the insulation resistance values determined prior to the alarm time, the insulation resistance value determined at the alarm time and a number n of the insulation resistance values determined after the alarm time are copied into a cache, the insulation resistance values copied into the cache are graphically displayed.