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III — OPERATION
CAUTION: DO NOT repeatedly toggle the circuit
breaker/switch as this may damage the unit. Set
Power ON/OFF circuit breaker to ON. When output volt-
age is available, the green POWER LED is on (see Figure
4).
OUTPUT VOLTAGE PROGRAMMING Monitor out-
put voltage setpoint across V
adjusting V
pot on front panel. Voltage across V
O
COM represents 1/10 of the programmed output voltage.
As an example, V
O
grammed output voltage of 46.3V ±1%. This relationship
is constant, regardless of the programming range
selected.
Default programming resolution is set to high range: out-
put can be adjusted to 110% of nominal V
through 28V models, 125% of nominal V
For low range (which offers increased resolution, while
limiting output to V
), or for external voltage programming
O
using either resistance or voltage refer to Operator man-
ual.
For metered (M option) units, if the V/A switch is set to V,
actual output voltage is displayed on the meter in Volts.
While the ACTUAL/SETPOINTS switch is held in, the pro-
grammed output voltage setpoint is displayed in Volts.
CURRENT LIMIT PROGRAMMING Monitor
rent limit setpoint across I
adjusting I
pot on front panel. Voltage across I
MAX
COM represents the percentage of available power supply
current as a percentage of rated current, with 10V corre-
sponding to 100%. Available current is defined as the
maximum current limit available based on the program-
ming range. This voltage is always based on a 0-10V
scale, regardless of the range selected. For example,
I
= 6.2V corresponds to 62% of the maximum pro-
MAX
grammable current. For the low programming range, this
corresponds to 62% of the rated module current, but for
the high programming range the number is 62% of 110%,
or 68.2% of rated module current. Current setpoint moni-
tor accuracy is ±5%.
Minimum programmable current limit is 50-60% of nomi-
nal. Default programming resolution is set to high range:
current limit can be adjusted to 110% of nominal I
low range (which offers increased resolution, while limiting
output to I
), or for external programming using voltage
O
source refer to Operator manual.
For metered (M option) units, if the V/A switch is set to A,
actual output current is displayed on the meter in
Amperes. While the ACTUAL/SETPOINTS switch is held
in, the programmed current limit is displayed in Amperes.
KEPCO, INC. 131-38 SANFORD AVENUE FLUSHING, NY. 11355 U.S.A. TEL (718) 461-7000 FAX (718) 767-1102
4
and COM jacks while
O
of 4.63V corresponds to a pro-
O
for 48V models.
O
and COM jacks while
MAX
www.kepcopower.com email: hq@kepcopower.com
OVERVOLTAGE PROTECTION The
protection (OVP) circuitry latches the output regulator off if
output voltage rises above a predetermined level. To
reset, remove source power for a minimum of 30 seconds
(refer to Operator manual to enable remote reset). The trip
level is preset at the factory for 130% of the nominal out-
put voltage. The trip point can be adjusted from 100% to
140% of the nominal output (except Model HSP 48-21A,
and
which can be adjusted from 100% to 160% of the nominal
O
output). To alter the preset OVP trip point, refer to the
Operator manual.
CURRENT LIMIT CHARACTERISTIC The factory
default setting is Continuous Limiting: When the output
current of the power supply reaches the programmed cur-
rent limit, the output regulator switches to current mode
for 3.3V
operation and maintains the output current by modulating
output voltage. Current mode is maintained indefinitely,
and recovery to voltage regulation mode is automatic
upon reduction of output current below the current limit
point.
Current Limit can also be set to Undervoltage Lockout: if
current mode is maintained for more than 15 seconds, the
output is turned off, and source power must be recycled to
restart the unit. Refer to HSP-A Operator manual for
details.
OTHER FEATURES The following features of the
cur-
HSP-A power supplies are covered in detail in the HSP-A
and
Operator manual:
MAX
• Parallel Operation, including load sharing require-
ments.
• Remote Inhibit, Remote Reset
• Remote Voltage and Current Limit adjustment
• Protection Circuits
• Status Flags and Indicators
• Load Monitor (Current)
• Current "Walk-In" for battery charging applications
• Load monitor
• Auxiliary supply
. For
O
• Keying
• I/O Connector pin functions
• Options
228-1935
overvoltage
092223
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