Intellix
™
BMT 330 User Manual
Page 32
BMT330UM
v1.0
20-Jun-16
Parameter
Suggested Value or Source of Data
Rejected phase packet
Number of continuous failed comms attempts
with bushing data before triggering alarm.
Default=50.
Rejected PD packet
Number of continuous failed comms attempts
with PD data before triggering alarm.
Default=250
Low bushing current warning
Default 30%. Current % drop from expected
current before this service alarm is triggered.
High top oil temperature
Default value 90 deg C. Alarm threshold for top
oil temperature.
Bushing current saturation
limit
ADC raw count threshold above which the input
signal is no longer linear. Default=6700
Power system frequency
warning
Percentage change in nominal frequency which
triggers an alarm, default=2%
Modbus comm. error
Number of continuous errors in the internal
RS485 line which triggers an alarm, default=50
No Signal Warning
Default = 10%. The percentage of I
ref
below
which this alarm is triggered.
Bushing R Failure Warning
The percentage increase in bushing adaptor
sampling current from one sampling period to
the next that triggers an alarm. An increase in
current is indicative of a failure in one of the
resistors, either in the bushing adaptor or the
Intellix™ BMT 330 motherboard input. Default =
40%, to be set according the expected current
and the input’s load.
Table 3: System Supervision Alarm Settings
Once all the settings have been entered, press the “
Write/Program
” button to
load the settings into the Intellix™ BMT 330. It is advisable to save the configuration
file by pressing the “
Save Settings To File
” button.