GE 869 - Page 417

CHAPTER 4: SETPOINTS MONITORING
869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL 4–285
– The latest or last computed maximum change in dB at a specific ‘k’ is represented
as a ‘dot’ in the current operating load bin and as a trend in future releases with
respect to time in cases where historical data is available. The dB data
represented in circle format will correspond to the maximum change in dB from
baseline dB at a specific ‘k’ value in the formula (k = 1,2,3) related to the fault.
NOTE
NOTE:
In cases where the baseline mode is disabled or the baseline data is not available, the user
can configure bearing, mechanical and stator function elements to operate based on peak
magnitude (and energy) dBs. In such cases PKP 1 and PKP 2 settings are configured to
correspond to the magnitude level (i.e. an example of 75 dB and 65 dB for PKP 1 and PKP 2
settings). However, in this case the circle will not plot any data
13. Motor M&D data is stored as a short-term historical log with a maximum of 4800
records with data logged at every 15 minute interval and during every intermediate
PKP when the motor is in monitoring mode.
– The file is stored in the local PC folder where EnerVista is installed @
C:\Users\Public\Documents\GE Power Management\8SeriesPC\OnLineDevice
Files\(Device Name in EnerVista). The filename format is:
log_ESA(Date_timestamp).txt, example: log_ESA20170511_162126.txt
NOTE
NOTE:
The file can also be converted to .csv format
– The file can be fetched and viewed by using EnerVista software in LDR (Learned
Data Record) format under the section Motor M&D\Records\Historical log as
shown in the next screenshot. Details of learned data record view can be found in
section Records\Motor Learned Data (of the 869 instruction manual).
– Additionally, the file can be converted to .xlsx or .xls format and opened using
Microsoft excel for analysis purposes or the trending of any parameter(s). T
properly align data as rows/columns in the excel format, open the file and delete
cell A1 and select shift cells left.
Figure 4-118: Viewing Motor M&D data file in EnerVista