KEPCO BOP-GL 1KW Operator Manual Firmware Ver.3.05 and higher - Manual (Page 71)

BOP-1K-GL 022814
3-9
mode, voltage is set to zero and both current protect and voltage limit are set to maximum.
When the unit is enabled, the pre-existing settings for voltage, current protect and voltage limit
are restored.
For both inductive loads and constant-current-type active electronic
loads when the BOP output is set to OFF, a path is provided for absorb-
ing either the energy accumulated in the reactance of the load during
the ON state, or energy delivered by an electronic load. This prevents
damage to the load and power supply as well as providing safety for
the user. However, In addition to the built-in safety features, constant-
current-type active electronic loads must be adjusted to zero and volt-
age and current measurements at the output must read 0V, minimum
current, before handling the power supply-to-load connections.
RESISTIVE. This mode, as the name suggests, is useful for resistive loads. Table 3-3 indicates
how the power supply responds to a command to go from Output ON to OFF.
Accessing the BOP after the output is disabled in BATTERY mode is
hazardous because (1) high current arcing is possible and (2) either the
external battery voltage, or the voltage (±Voltage Protection max) on
the BOP output terminals may be dangerous. Therefore, for battery and
constant-voltage-type active electronic loads it is recommended that
two properly rated external switches be installed for safety: one in
series with the battery, and one across the BOP output. After the unit is
set to OFF, first open the switch in series with the battery, then close
the switch across the BOP output to ensure safety before handling
BOP connections. When connecting the battery, the switch across the
output should be opened after the connections are complete and then
the switch in series with the battery should be closed. If the constant-
voltage-type active electronic load is adjusted to zero before handling
the power supply-to-load connections, only the switch across the BOP
output is required.
BATTERY. This mode is necessary for the power supply to function properly and safely with
either battery or constant-voltage-type active electronic loads. This mode prevents the battery
from discharging during the OFF state. When the output is disabled (set to OFF), the BOP will
go to current mode, current will be set to zero, with voltage protect and current limit set to maxi-
mum. In this way the battery will not be discharged while the output is OFF. For constant-volt-
age-type active electronic loads this mode stops energy flow during the OFF state. Table 3-3
indicates how the power supply responds to a command to go from Output ON to OFF.
WARNING
WARNING