EATON ELECTRICAL
53
Predictive Diagnostics
Low Limit for PDI and Pulse Count Calculations:
PDI and pulse count are calculated for each channel starting from the magnitude zone and up. This
feature allows rejecting background noise levels from affecting PDI and pulse count calculations. The low
magnitude limit to calculate parameters can be set for each channel independently based on its own
background noise level, if any.
There are two options to set these limits – automatic and manual.
In
automatic
mode the device will measure actual signals from each channel with the noise channel set
OFF. It will count all pulses received by the channel and find a magnitude, when the total number of
pulses above this magnitude will exceed 50,000 per second. The device will suggest the next magnitude
window above detected as a low boundary for parameter calculation. If confirmed by a user, additional
sub-function will align boundaries for all channels with the same sensitivity to the same maximum of all
detected value.
Manual
option allows setting all boundaries manually.
Automatic Detection
♦
Scroll setup parameters until
nOiSEtSt
appears.
♦
Press
Enter
. The device will start measurements on all active channels in order to determine the best
setting. When done,
CH01- XX
will be displayed. Using
channels can be scrolled and measured
value displayed for each channel.
♦
Press
Enter
. The prompt
AliGn- Y
will appear.
♦
Use
to choose from Yes (
Y
) and No (
N
).
♦
If YES is selected and
Enter
is pressed, the device will set the same maximum value for all channels
with the same sensitivity.
♦
If NO is selected and
Enter
is pressed, the device will keep unique values for each channel as it was
detected.
♦
To exit without saving new values press
Esc
.
Manual Setting
♦
Scroll setup parameters until
CALcPdI
appears.
♦
Press
Enter
.
♦
CH01
will be displayed. Using
scroll channels to get a desirable.
♦
Press
Enter
.
♦
PdI - XXXX
will appear. Use
to scroll through available choices. When done, press
Enter.
Chose another channel and repeat the setting for this channel.
♦
When done with all channels, press
Esc
.
Software Filters
At the latest firmware versions of InsulGard software filters based of PD fingerprint analysis are became
available. These filters have been specifically developed for coupling capacitor sensors on large turbine
generators equipped with long iso-phase bus ducts. We do not recommend to use these filters in another
equipment or sensors without consulting to an expert.
♦
Scroll setup parameters until
FiLtEr
appears.
♦
Press
Enter
.
CH01
will appear.
♦
Using
keys select desirable channel and press
Enter
.
♦
FiLtEr-0
appears. Using
keys select filter number from filter choice 1, 2 or 3. If 0 is selected no
filter being used.
♦
Press
Enter
, select another channel and repeat the procedure.
♦
Press
Esc
when done with all channels.
