KEPCO HSP Series Operator Manual - Manual (Page 17)

HSPSERIES OPR 050614
2-3
2.3 SOURCE POWER REQUIREMENTS
This power supply will operate with the installed circuit breaker from single phase a-c mains
power over the specified voltage and frequency ranges without adjustment or modification.
Operation from d-c power is also available; please contact factory for limitations imposed when
using d-c source power.
2.4 COOLING
The power devices used within the HSP power supply are maintained within their operating tem-
perature range by means of internal heat sink assemblies cooled by an internal cooling fan. The
cooling method utilizes pressurization rather than evacuation, resulting in greater cooling effi-
ciency and reduced contaminant collection within the enclosure. ALL INLET AND EXHAUST
OPENINGS AROUND THE POWER SUPPLY CASE MUST BE KEPT CLEAR OF OBSTRUC-
TION TO ENSURE PROPER AIR ENTRY AND EXHAUST. Periodic cleaning of the power sup-
ply interior is recommended. If the power supply is rack mounted, or installed within a confined
space, care must be taken that the ambient temperature, which is the temperature of the air
immediately surrounding the power supply, does not rise above the specified limits for the oper-
ating load conditions (see PAR. 1.3 and Figure 1-2).
2.5 PRELIMINARY OPERATIONAL CHECK
A simple operational check after unpacking and before equipment installation is advisable to
ascertain whether the power supply has suffered damage resulting from shipping. Refer to Fig-
ures 2-1, 2-2 and 2-3 for location of operating controls and electrical connections.
1. THE POWER SUPPLY WILL NOT OPERATE UNLESS THE REMOTE SENSE LINES ARE
PROPERLY CONNECTED TO THE OUTPUT TERMINALS! Connect the remote sense ter-
minals to the output bus bars using the mating I/O Connector (Kepco P/N 142-0422) or other
means as shown in PAR. 2.7.5.1 and Figure 2-4.
2. Connect the power supply to source power as defined in PAR. 1.3. Connection can be made
using either the North American linecord set (Kepco P/N 118-0776) or using a custom line-
cord terminated at one end with an IEC 320/C19 plug (Kepco P/N 142-0381). Follow all
requirements of local electric code regarding wire size, termination, etc.
3. Connect a static load, R, across output terminals. The load value is determined by the nomi-
nal output voltage of the HSP power supply and must be capable of handling 2% of the
power supply output rating (minimum power capability of 20 watts). R is calculated as
approximately equal to output voltage
2
/20 (R = E
2
/P). For example, for the HSP 48-21, R =
48
2
/20 = 115.2; use load of 120 ohms, 20 watts.
CAUTION: DO NOT repeatedly toggle the circuit breaker/switch as this may damage the
unit.
4. Set Power ON/OFF circuit breaker/switch on front panel to ON. If actuator does not lock
when released, wait a few seconds before trying again. The circuit breaker is “trip-free”
design; if overload exists, contacts cannot be held closed by actuator. Verify that the
“POWER” indicator LED on the front panel is lit, and that all other indicator lamps on the front
panel are not lit.
5. Using a DVM, measure the voltage across the output bus bars; this voltage is factory set to
the value shown in Table 1-1. If necessary, adjust the output voltage using the trim pot
labeled “V
O
” accessed through the front panel.
6. Using the DVM, measure the voltage across the front panel test points “V
O
” and “COM”; this
voltage should read
1
/
10
of the output voltage measured in step 5 above, ±1%.