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Select the DC conductor size and material for the inverters according to the
following configuration table:
Table 3-5 DC Terminal Specifications
#12-8AWG ( 75/90℃ Copper only) when terminating to
the fuse holders
#6~2AWG (Copper or Aluminum) when using the Bypass
Terminal kit accessory.
INSTRUCTION:
The SCA25KTL-DO/US-208 、 SCA50KTL-DO/US-480 and
SCA60KTL-DO/US-480 3-Phase Inverters are designed operate
with ungrounded arrays, although the PV system requires a DC
EGC (equipment grounding conductor) to ensure operational
safety. The grounding busbars are electrically bonded by way of
the inverter chassis.
3.3.3.2 DC Fuse Configuration/Selection
The CPS SCA25KTL-DO/US-208 、 CPS SCA50KTL-DO/US-480 and
SCA60KTL-DO/US-480 inverter wire boxes include touch safe fuse
holders and preinstalled 20A DC fuses as factory standard. Ensure that the
appropriate fuse values are used depending on the configuration of the PV
array and by performing PV fuse sizing calculations for each string.
1. Each DC input conductor for the PV string requires fuse protection.
(2014 NEC and earlier editions)
2. The voltage rating of the fuse must be at least 1000V
DC
.
Contact CPS Customer Service for further information.
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