Basler BE1-CDS220, Instruction Manual

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BE1-CDS220 Protection and Control 4-33
Operating Settings for Breaker Failure
Operating settings are made using BESTCOMS. Figure 4-29 illustrates the BESTCOMS screen used to
select operational settings for the breaker failure element. To open
BESTlogic Function Element screen
for the breaker failure element, select Breaker Failure from the Screens pull-down menu. Alternately,
settings may be made using the SP-BF ASCII command or through the optional HMI interface using the
\PROT\GLOBAL\BF Screen.
Figure 4-29. Breaker Failure Screen, 50BF Tab
Beside the Logic pull-down menu is a pull-down menu labeled Settings . The Settings menu is used to
select the setting group that the elements settings apply to.
The default unit of measure for the Pickup setting is secondary amps. The unit of measure for the Time
setting that represents the element's time delay defaults to milliseconds. It is also selectable for seconds,
minutes, and cycles.
Table 4-18 summarizes the operating settings for Breaker Failure.
Table 4-18. Operating Settings for Breaker Failure
Setting Range Increment
Unit of
Measure
Default
0 = Disabled N/A N/A
50 to 999 ms 1 m Milliseconds
0.05 to 0.999 seconds 0.1 sec Seconds
Timer Setting
0 to 59.94 (60 Hz) or 0 to 49.95 (50 Hz)
∗
Cycles
0
∗
Time delays less than 10 cycles can be entered to the nearest 0.1 cycles from the front panel HMI. All
time delays can be entered to the nearest 0.01 cycles from the ASCII command interface. Time delays
entered in cycles are converted to milliseconds or seconds. Increment precision after conversion is limited
to that appropriate for each of those units of measure.
Example 1. Make the following operational settings to the breaker failure element. See Figure 4-51.
Timer Setting: 100 ms