Basler BE1-CDS220, Instruction Manual

Page: 136 / 476

6-18 Reporting and Alarm Functions BE1-CDS220
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
I
2
*t
)
and the CT setting (CT 1 or 2) is affected. The other set of registers is ignored.
RT-DUTY Command
Purpose:
Read/Set Transformer Through Fault Duty Log
Syntax: RT-DUTY[{phase}[={%duty}]] where %duty is % of dmax set with ST-DUTY
Comments: {phase} - transformer phase A/B/C.
{%duty} - accumulated transformer duty as a percent of DMAX from 0.0 to 200.
RT-DUTY Command Examples:
Example 1. Read current values of transformer duty log.
>RT-DUTY
RT-DUTYA= 92%; RT-DUTYB= 22%; RT-DUTYC= 27%
Example 2. Reset phase A duty to zero after maintenance has been performed.
>RT-DUTYA=0
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
(Figure 6-7). Pull down the Screens menu and select Reporting and Alarms. Select the Transformer
Monitoring tab. Alternately, settings can be made using the ASCII command SA-TX or using the HMI
Screen 6.6.2, \SETUP\XFORM\ALARMS. When [n] in SA-TX[n] is equal to 1, alarm point number one is
selected, likewise for alarm points 2 and 3. When <mode> is set to 0, the transformer alarm function is
disabled. When <mode> is set to 1, the transformer alarm function is set for percent duty and the alarm
limit threshold is set for a percentage of DMAX which is programmed using the ST-DUTY command. The
transformer CT to be monitored is also programmed using the ST-DUTY command. When <mode> is set
to 2, the transformer alarm function is set for through faults and the alarm limit threshold is set for the
through-fault counter value which when reached would cause an alarm. The transformer CT to be
monitored is programmed using the ST-DUTY command. Table 6-9 lists the settings for the transformer
programmable alarms function.
Table 6-9. Transformer Programmable Alarms Settings
Setting Range/Purpose Default
0 = Disabled
1 = Transformer alarm function enabled and set for percent duty.
Mode
2 = Transformer alarm function enabled and set for through faults.
0
Alarm Limit
(in mode 1)
0 to 100%; Increment = 1; Measured in % of DMAX 0
Alarm Limit
(in mode 2)
0 to 99999; Increment = 1; Number of through faults 0