Installation and Operation Manual (Rev E)
SGI Series Inverters
DOCR-060371
22
The breaker subcombiner plate is populated with a number of 600VDC breakers in a variety of
configurations designed to meet numerous array designs.
SGI 500, SGI 500PE: 8 positions
225 – 400A 600VDC breakers
SGI 225-300: 6 positions
225 – 400A 600VDC breakers
SGI 500, SGI 500PE: 16 positions
110 – 200A 600VDC breakers
SGI 225-300: 12 positions
110 – 200A 600VDC breakers
Cu or Al Conductors
Max. 8 x 4/0AWG-500kcmil
75C connections, 375 in-lbs (3/8” hex)
1 wire per breaker position
or
Max. 16 x 2/0AWG-250kcmil
75C connections, 275 in-lbs (5/16” hex)
and 375 in-lbs (3/8” hex)
2 wires per breaker position
Cu or Al Conductors
Max. 16 x 2AWG-300kcmil
75C connections, 275 in-lbs
1 wire per breaker position
Table 4.3 – DC Ungrounded Inputs, Breaker Subcombiner
NOTE:
Not all of the breaker positions will be used in all designs. In the case that
not all of the positions will be used, the inverter will ship with breakers in the
unused locations. The locations of the used and unused positions will be clearly
labeled on the shield that covers the exposed terminals. The installer
must
follow
the labeling for the used connections to ensure proper functionality of the
inverter. Failure to follow the labeling may cause the inverter not to be able to
sense the DC voltage, preventing the inverter from turning on.
