Dc Connections From The Pv Array; Dc Wiring - Solectria Renewables PVI 23TL Installation And Operation Manual

PVI 23TL & PVI 28TL Installation and Operation Manual
5.0 DC Connections from the PV Array
WARNING: All wiring connections at the inverter must be performed with the
building AC source circuit panel/breaker off and the PV module strings
disconnected. AC and DC disconnect switches at the inverter must also remain off
during termination.
WARNING: All electrical wiring must be done by electrically qualified personnel in
accordance to local and national electrical code.
WARNING: Remove all fuses. Before connecting the DC conductors of the PV array
to the inverter, verify and mark the polarity of the conductors. Verify the correct
polarity and voltage before installing fuses.
WARNING: Before connecting the DC conductors of the PV array to the inverter
fuse terminal or bypassing them, verify that the DC voltage is less than 1000VDC in
all conditions. DC voltages over 1000VDC will damage the inverter. Configure the
array such that the open circuit voltage will never exceed 1000VDC. Warranty is
void if more than 1000VDC is applied to the DC section of the inverter.
WARNING: Fuses in the inverter must only be replaced with the same type and
rated fuses as originally installed.
WARNING: The terminal is rated only for CU wire; using AL wire directly at the
terminal will void the warranty. The use of AL wire must follow local code
requirements for connecting AL wire to CU terminals.
5.1 DC Wiring
For DC wiring, 90°C PV copper conductors must be used. The inverter terminals are listed for 75
wire; see NEC 310.10 or the Canadian Electrical Code regarding the temperature ratings of wire
and terminals. The conductor size shall not be smaller than the 75°C wire size based on the
ampacities given in Table 310.16 of the NEC, ANSI/NFPA 70, and an additional derating factor of
125% as indicated by UL 1741.
A maximum of 16 total DC conductors (8 positive & 8 negative) can be connected and fused at
15Amps as shown in Figure 5.1 below.
WARNING: The DC input order has changed in this wiring box design from
previous designs, the new order from Left to Right is DC input Positive 1, DC input
Positive 2, DC Input Negative 1, and DC input Negative 2.
DOCR‐070365‐E
PVI Series Inverters
°
C
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