Basler BE1-CDS220, Инструкция по эксплуатации

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BE1-CDS220 Reporting and Alarm Functions 6-25
Table 6-12 summarizes SB-DUTY command settings.
Table 6-12. Breaker Duty Monitoring Settings
Setting Range/Purpose Default
Mode
0 = Disabled
1 = Enabled with duty calculated as
I
2 = Enabled with duty calculated as
I
2
0
Winding
1 = CT Input 1
2 = CT Input 2
2
100% Duty
Maximum
Maximum duty the breaker contacts can withstand before they need
service. DMAX is programmed in primary amperes using exponential
floating-point format. The maximum DMAX setting is 4.2e+7.
0.000e+00
Block
Logic expression. Logic OR term which blocks the breaker duty
accumulation when TRUE (1).
0
Example 1. Make the following settings to your Breaker Duty Monitoring Settings. Refer to Figures
6-10 and 6-11.
Mode: Enabled
I2
Winding: CT Input 1
100% Duty Maximum: 0.000e+00
Block: IN5
Retrieving Breaker Duty Information
The values currently stored in the accumulated interruption duty registers can be read from HMI Screen
4.3.1, \REPRT\BRPTS\STATUS. 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 RB-DUTY (report
breaker, duty) command. It should be noted that when reading and writing to these registers, only the set
of registers selected to be monitored by the mode setting (Accumulated
I
or
I
2
) and the CT setting (CT 1
or 2) is affected. The other set of registers is ignored.
RB-DUTY Command
Purpose:
Read/Set Breaker Contact Duty Log
Syntax: RB-DUTY[{phase}[={%duty}]] where %duty is % of dmax set with SB-DUTY
Comments: phase = breaker pole A/B/C. %duty = accumulated breaker pole duty as a percent of
DMAX from 0.0 to 200.
RB-DUTY Command Examples:
Example 1. Read the current values of contact duty log.
>RB-DUTY
RB-DUTYA= 92%; RB-DUTYB= 22%; RB-DUTYC= 27%
Example 2. Reset phase A duty to zero after maintenance was performed.
>RB-DUTYA=0
The breaker duty registers can be monitored to give an alarm when the value exceeds a threshold. See
the paragraphs on Breaker Alarms in this section for more information on this feature.
Breaker Clearing Time Monitoring
The breaker clearing time monitoring function monitors the time from when a trip output occurs (as
defined by the TRIP logic expression) to when the fast dropout current detector detects that current is
zero in all three poles of the breaker (see Locator D for Figure 6-9). The monitored breaker is determined
by the CT circuit parameters set in the SB-DUTY function. The output of the breaker clearing time
function is reported as a line in the fault summary reports. It is important to note that if the TRIP logic