053119
228-1915
13
KEPCO, INC.
131-38 SANFORD AVENUE
FLUSHING, NY. 11355 U.S.A.
TEL (718) 461-7000
FAX (718) 767-1102
http://www.kepcopower.com
email: [email protected]
WARNING
For both inductive loads and con-
stant-current-type active electronic
loads when the BOP output is set
to OFF, a path is provided for
absorbing either the energy accu-
mulated 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 pro-
viding safety for the user. However,
In addition to the built-in safety fea-
tures, constant-current-type active
electronic loads must be adjusted
to zero and the BOP front panel
LCD must read 0V, minimum cur-
rent, before handling the power
supply-to-load connections.
Resistive.
This mode, as the name suggests, is useful
for resistive loads. Table 4 indicates how the power
supply responds to a command to go from Output ON
to OFF.
WARNING
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 volt-
age (±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-voltage-type
active electronic loads this mode stops energy flow
during the OFF state. Table 4 indicates how the power
supply responds to a command to go from Output ON
to OFF.
CONFIGURE LOAD TYPE.
To configure, press
%
from the power-up screen, then highlight Load
Type and press
!
to modify. (If a Password is
required, see Operator’s Manual for instructions.) High-
light Active, Resistive or Battery (see explanations and
associated WARNINGS above) and press
$
to save.
Then press
$
to save for power-up,
#
to abort, or
%
to apply the changes (without saving for power-up)
and exit. After configuring, the new setting will be effec-
tive when the power supply goes from output on to out-
put off.
To restore factory default (Active), press
%
from the
power-up screen, highlight Load Type, press
!
, then
press
@
to restore default. Press
$
to save for
power-up or
%
to exit
ENABLING/DISABLING OUTPUT POWER.
The BOP output can be disabled (OFF) or enabled
(ON) by toggling the
STANDBY
key in local mode. The
behavior of the unit when disabled depends on the
Load Type setting (See “Max/Min Setting Menu” on
page 12. 8 and Table 4 for details).
