Figure 6-7. Reporting and Alarms Screen, Transformer Monitoring Tab
Table 6-8. Transformer Duty Monitoring Settings
Setting Range/Purpose Default
0 = Disabled
1 = Transformer monitoring enabled with duty calculated as
I*t
2 = Transformer monitoring enabled with duty calculated as
I
2
*t
Mode
t
= Fault clearing time
0
DMAX
Range = 0 to 4.2e+7; Increment = 1; Measured in primary amperes
0.000e+00
Circuit #
1 = Ckt # 1, 2 = Ckt # 2, 3 = Ckt # 3, 4 = Ckt #4, 5 = Ckt # 5, 6 = Ckt #6
1
Block
Logic
Logic expression that blocks transformer duty accumulation when TRUE.
(This parameter cannot be set through the HMI.)
0
Retrieving Transformer Duty Information
The values currently stored in the accumulated transformer duty registers can be read from HMI Screen
4.5.1, \REPRT\XFORM\DETAILS. Pressing the
Edit
key allows the user to enter a number into the
register to preset to a previous value. Write access to the reports functional area is required to edit this
value. These values can also be read and set through the ASCII command interface using the RT-DUTY
(report transformer, duty) command. It should be noted that when reading and writing to these registers,
only the set of registers that is selected to be monitored by the mode setting (accumulated
I*t
or
I2*t
)
and the CT setting (CT 1 - 6) is affected. The other set of registers is ignored.
The transformer duty registers can be monitored to give an alarm when the value exceeds a threshold.
See
Transformer Alarms,
in this section for more information on this feature.
Transformer Alarms
The programmable alarms function includes three alarm points for checking transformer monitoring
functions. Each of these alarm points can be programmed to monitor either of the two transformer
monitoring functions (through-fault counter or through-fault duty). That is, you may program an alarm
threshold (limit) to monitor each function. Alternately, you may program three different alarm thresholds to
monitor one of the monitored functions. The transformer alarms may be programmed using BESTCOMS
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BE1-CDS240 Reporting and Alarm Functions
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Summary of Contents for BE1-CDS240
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