3-26
BOP HIPWR 091719
parasitic voltage drop equal to, or less than, the accuracy of the voltage limit loop (0.3% of rated
output), the dithering will stop. While dithering between current mode and voltage limit mode,
the front panel meter will show an approximate average output voltage which will be higher than
the voltage limit set value.
Discharging the battery using current mode operation must be carefully monitored. If the voltage
limit is unchanged and the current is set to a negative value, the battery will discharge at the
BOP current setpoint value. If the process is not monitored and stopped, the battery will be com-
pletely depleted. The BOP will even try to reverse-charge the battery to the negative voltage
limit value. Therefore, if current mode is chosen, it is recommended that independent limits be
used, and the negative voltage limit be set to minimum (0.2% of rated output voltage).
If the positive voltage-limit is set lower than the battery's voltage, then more than one loop will
try to control the output. Consequently, the battery will discharge at a much higher current than
the BOP current setpoint. As previously described, if not monitored and the process stopped,
the discharge will completely deplete the battery.
If current mode is needed, Kepco can modify the unit to establish the voltage limit feedback loop
to use the Sense terminals, rather than the Monitor terminals. The modified unit behaves similar
to that described for voltage mode except that voltage accuracy is 12-bit/ 0.3%, versus 14-bit/
0.1% for voltage mode. Contact Kepco Sales for further details.
3.3.8
CHANGING THE DEFAULT POWER UP SETTINGS
When the BOP is shipped, the default settings listed in Table 3-7 are programmed to be in effect
each time the unit is turned on, however these defaults may be changed.
Table 3-8 illustrates the relationship between Mode of Operation, Main Channel Reference,
Main Setting, Protection Type and Levels settings. To change the default settings refer to the
applicable paragraph(s) specified in Table 3-7 as needed. then from the power-up screen press
%
. Highlight Power-up Settings and press
!
. (If a Password is required, see PAR. 3.2.4.3 for
instructions.) Highlight the parameter and press
!
to modify. Use
Y
,
U
or the
ADJUST
con-
trol to highlight a selection, then press
$
to apply. To change a value use the number keys to
enter new setting, then
$
to apply. When all power-up settings have been configured, press
$
to save for power up or
%
to exit and abort the change.
To restore the factory default power-up settings listed in Table 3-7, from the power-up screen
press
%
. Highlight Power-up Settings and press
!
. Then press
@
to restore the defaults.
Then press
$
to save for power up or
%
to exit and abort the change. Note that GPIB
address and Baud Rate are NOT changed when
@
is used to restore factory defaults.
These settings can be directly applied to a load upon power-up. Many other configurable set-
tings can be saved for power up using the
$
key after modifying the setting.
Summary of Contents for BOP-ME 1KW
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Page 20: ...xii BOP 1K 091719 FIGURE 1 1 HIGH POWER BOP SERIES POWER SUPPLY...
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Page 64: ...2 22 BOP HIPWR 091719 FIGURE 2 11 PARALLEL CONFIGURATION LOCAL SENSING TYPICAL...
Page 65: ...BOP HIPWR 091719 2 23 FIGURE 2 12 PARALLEL CONFIGURATION REMOTE SENSING TYPICAL...
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Page 161: ...BOP HIPWR 091719 3 85 FIGURE 3 29 STATUS REPORTING STRUCTURE...
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