Page 398 - Decision Making Applications in Modern Power Systems

360 Decision Making Applications in Modern Power Systems

the dynamic excitation of the equipment operation, it represents a mea-
sure of the amplitude level of its vibration signal. In the case of the appli-
cation for predictive maintenance, the international technical standards,
among them the ISO, define two criteria for adoption of a global value
(Fig. 13.15).
2. Analysis of water content in lubricating oil
The determination of the presence and content of water in the case of
study was carried out through the distillation by drag. The sample is sub-
jected to heating for distillation under controlled conditions, thus verify-
ing the water content in the lubricating oil.
The graph shows the results of the analysis of water content, done
periodically as predictive, showing normal levels, since the tolerable is
0.3% (Fig. 13.16).
a. Analysis of metal content in lubricating oil
The graph made by direct reading (iron and copper) ferrography,
which was carried out based on the extraction of the magnetizable

FIGURE 13.15 Measurement points in the vibration analysis (2018).

FIGURE 13.16 Water content and lubricating oil (2018).