The original power quality meters that were installed in the building in 2009 are designed to measure voltage and current inputs of 32 samples per cycle. Events are analyzed according predefined triggers, and it has a built-in alarm that is triggered simultaneously when the event occurs. The system is further hampered with a storage capacity of only 89 seconds for waveform data, or alternatively may store a total number of 256 events limited to only 20 cycles for each event. The software’s configuration for LG included data from a specific range – i.e.: 2 cycles before the event and 60 cycles post the event, meaning a total number of 62 cycles for a maximum number of 82 events.
After a major event, the engineers realized the disadvantages of the original system. Compared to the G4400 units, the system was only able to detect that some event happened and when the event happened, which in itself is obvious information (see Graphs below). In addition, conventional technologies are usually designed to measure expected events. This may suffice in the general operation of the building where the offset of alarms are needed, and corrective action may be taken immediately. However, finding the cause for the event and doing an in-depth analysis was almost impossible with the available short term data of the event. This holds many detriments in itself, especially in the protection of the equipment, and taking preventative action.