Before data is stored to the database, averages are calculated ĘC ignoring extreme values (basic filtering). A standard filter is also applied to the tan (d) values being stored in the database. Technical experts can adjust the filter factor.
All data is 'continuously' analyzed according to a user definable frequency (in hours). The evaluation of the data is based on a comparison of measured values with historical data for each particular unit.
From the analysis, the software calculates an "absolute" condition value for every unit in service. These values range from 0 (good) to 100+ (bad). Simple "green, yellow, red" indications of the condition of equipment are given based on these condition values.
One capacitive divider unit (CDU) for each test point
One measurement tap unit (MTU) for three CDUs
Front-end Processing Box with
-- Input conditioning board
-- Rendezvous board
-- Watchdog board
-- Alarm board
32, 64, 128 Test Points (input channels)
-- Nominal signal level: 40Vrms, 50/60Hz
-- Isolation between inputs: 3000V
-- Surge withstand capabilities: ANSI/IEEE C37.90.1-1989