6
228-1678 REV 1
081415
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]
IV — OPERATION
Turn the unit on using the front panel POWER switch/cir-
cuit breaker (see Figure 2 or 3).
CAUTION: DO NOT
repeatedly toggle the POWER on/off switch as this
may cause unit to fault.
If actuator does not lock when
released, wait a few seconds before trying again. The cir-
cuit breaker is “trip-free;” if overload exists, contacts can-
not be held closed by actuator.
NOTE: PC 15 rear programming connector must be
installed to enable local control of the unit.
NOTE: BOP 5-20DL only: apply voltage (+3.5 to +24V)
to pin 2 referenced to pin 3 of ON-OFF PORT
at rear panel to enable the output.
4.1. VOLTAGE MODE OPERATION WITH CUR-
RENT LIMITING.
The BOP may be used as a stabi-
lized (d-c) source of positive or negative voltage with out-
put current limiting (for either polarity) when pre-selected
for the application at hand. Always monitor the front panel
meters while adjusting output voltage/current.
1. Determine the output voltage and current requirements
of your load. Disconnect the load and set the BOP
MODE switch to CURRENT and the CURRENT CON-
TROL switch to ON.
2. Voltage limits are recommended to be greater than the
maximum voltage required for the load by 10% of the
rated voltage of the unit (e.g., for a 72V BOP and a
load that requires 30V, set voltage limits to ±37.2V).
If specific ± voltage limits are not needed, use a screw-
driver to adjust the
+
V
VOLTAGE LIMIT potentiome-
ter to full clockwise position and
–
V
VOLTAGE LIMIT
potentiometer to full counterclockwise position.
If specific ± voltage limits are needed, proceed as fol-
lows.
a. Turn CURRENT CONTROL fully counterclockwise.
Use a screwdriver to adjust the
–
V
VOLTAGE
LIMIT potentiometer as desired (recommended to
be 10% greater than the maximum negative volt-
age required for the load), monitoring the VOLT-
AGE meter for the correct limiting value.
b. Turn CURRENT CONTROL fully clockwise. Use a
screwdriver to adjust the
+
V
VOLTAGE LIMIT
potentiometer as desired, monitoring the VOLTAGE
meter for the correct limiting value.
3. With the a-c POWER circuit breaker/switch set to OFF,
connect a short circuit across the OUTPUT and COM-
MON terminals.
4. Set the CURRENT CONTROL switch to OFF. Set the
MODE switch to VOLTAGE and the VOLTAGE CON-
TROL switch to ON, then set BOP POWER a-c circuit
breaker/switch to ON.
5. Adjust the
+
I
and
–
I
CURRENT LIMIT potentiome-
ters for both polarities as required, monitoring the
CURRENT meter for the correct limiting value. Pro-
ceed as follows:
a. Turn VOLTAGE CONTROL fully counterclockwise.
Use a screwdriver to adjust the
–
I
CURRENT
LIMIT potentiometer as desired.
b. Turn VOLTAGE CONTROL fully clockwise. Use a
screwdriver to adjust the
+
I
CURRENT LIMIT
potentiometer as desired.
c. Set a-c POWER circuit breaker/switch to OFF, then
remove the short circuit from the output.
d. Set a-c POWER circuit breaker/switch to ON and
adjust the output voltage to zero using the VOLT-
AGE CONTROL.
e. Set a-c POWER circuit breaker/switch to OFF, then
connect the load to the BOP output.
6. Set a-c POWER switch/circuit breaker to ON, and
adjust the operating voltage by means of the VOLT-
AGE CONTROL to the value required.
NOTE: If the output current exceeds the pre-adjusted
value at any time the VOLTAGE MODE indicator will go
out and the CURRENT LIMIT indicator will go on. After the
cause of the overcurrent is eliminated, the indicator lights
will return to their initial status.
4.2. CURRENT MODE OPERATION WITH VOLT-
AGE LIMITING.
The BOP may be used as a stabilized
d-c source of positive or negative current, with output volt-
age limiting (for either polarity), pre-selected for the appli-
cation at hand. Always monitor the front panel meters
while adjusting output voltage/current
