KEPCO HSP Series Operator Manual - Manual (Page 37)

HSPSERIES OPR 050614 3-11
tion of the fault detector remains unaffected by the inclusion of the meter option. The following
paragraphs describe the meter functions in detail.
3.15.1 VOLTMETER OPERATION
With the V-A selector switch set to ‘V' position (green V indicator illuminated), the meter nor-
mally displays the actual output voltage present at the error sense terminals (within ±2%). If the
ACTUAL/SETPOINTS switch is depressed with the V-A selector switch set to V, the display
shows the programmed output voltage (±1%) of that module, regardless of the actual output sta-
tus at the time (refer to VSET, PAR. 3.7); unlike VSET, however, both actual and setpoint volt-
ages are displayed in volts. If desired, the programmed setpoint can be adjusted using the
previously selected output voltage programming method (PAR. 3.3). Releasing the ACTUAL/
SETPOINTS switch causes the meter to resume displaying actual output voltage.
3.15.2 AMMETER OPERATION
With the V-A selector switch set to ‘A' position (amber A indicator illuminated), the meter nor-
mally displays the actual output current (within ±12%) presently being supplied by the module. If
the ACTUAL/SETPOINTS switch is depressed with the V-A selector switch set to I, the display
shows the programmed current limit (±1%) of that module, regardless of the actual current being
supplied at the time (ref. ISET, PAR. 3.7); unlike ISET and ISHARE, however, both actual cur-
rent and setpoint current limit are displayed in amperes. If desired, the programmed setpoint for
current limit can be adjusted using the previously selected current limit programming method
(PAR. 3.5). Releasing the ACTUAL/SETPOINTS switch causes the meter to resume displaying
actual module output current.
NOTE: Ammeter accuracy of ±12% applies for load currents between 25 and 100% of rated
output current (e.g., between 50 and 200 Amperes for HSP 5-200). For load currents
less than 25%, ammeter accuracy degrades significantly.
3.15.3 PARALLEL/REDUNDANT OPERATION
The display function is fully operational when HSP is used either singly, as a stand-alone power
supply, or in multiples, as part of a parallel/redundant or series load arrangement. When used as
part of a parallel/redundant power system, however, the following points should be noted.
When the meters are functioning as voltmeters:
• The actual voltage displayed by each power supply module represents the output bus
voltage, and not the individual voltage supplied by each module.
• The setpoint function, however, does display the individual setting for the specific power
supply module being measured, thus allowing on-line calibration of all of the power sup-
ply modules in the system.
When the meters are functioning as ammeters,
• The actual current displayed by each power supply module represents actual module
output current regardless of output configuration.
• The setpoint function for current limit displays the individual setting for the specific power
supply module being measured,