KEPCO RA 59, Инструкция по эксплуатации

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2-4
RA 59 051313
order to ensure proper grounding of the HSP power supplies when installed. The con-
ductor used to connect Terminal G to safety ground must be sized to support the total
fault current of all of the power supplies installed in the rack adapter: for HSP series
power supplies, the ground fault current rating is 20 amperes per power supply. Consult
local electric codes for the proper wire size to carry the required fault current.
• Terminal pairs LI/NI, L2/N2, L3/N3, L4/N4 are connected to the high-side and low-side
contacts of the source power connectors for each of the three power supply mounting
positions (1, 2, 3 and 4) of the rack adapter (see Figure 2-2). Each terminal pair (Lx/Nx)
is isolated from the remaining two pairs, facilitating redundant source power connections
if desired. The conductor used to connect terminals Lx and Nx to source power must be
sized for the 16 ampere maximum source current drawn by HSP Series power supplies;
Kepco recommends #I4 AWG (2.5mm2) or equivalent minimum conductor size to sup-
port this current.
2.7.3 SOURCE POWER CONFIGURATIONS
The following standard wiring configurations are recommended by Kepco as being compliant
with national and international safety standards. It is the user’s responsibility to ensure that all
applicable local electric codes are met. The minimum and maximum limits for source power volt-
age are defined in HSP series power supply specifications.
CAUTION
UNDER NO CIRCUMSTANCES SHOULD THE STEADY-STATE SOURCE VOLTAGE
APPLIED ACROSS ANY Lx/Nx PAIR EXCEED 277V rms!
2.7.3.1 A-C SOURCE POWER, SINGLE PHASE
For single-phase a-c source power, connect Terminal G of the rack adapter to source power
safety ground; then connect a separate wire pair from the power source to each Lx/Nx terminal
block pair to be populated by an HSP power supply (see Figure 2.3).
FIGURE 2-3. SINGLE PHASE A-C.D-C SOURCE POWER WIRING
If desired, a single wire pair can be run from the power source to any Lx/Nx pair, with jumpers
connecting the remaining Lx/Nx pairs to the first pair; however, the wires must be adequately
rated to support the total current being delivered through them. For the example shown in Fig-
ure 2-3, the jumper wires are sized for 16 amps, but the source wires must be sized for 4 times
16 amps, or 64 amps.