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©
2015 Sensata Technologies
2.0 Installation
2.5.4 AC Terminal Block Connections
The CSW2012-X has a two-pole AC input terminal block, a four-pole AC
output terminal block and one AC ground screw to connect the inverter’s
AC input and output wiring. These terminal blocks (see Figure 1-2, Items 9
and 10) allow a service/distribution panel (main panel) to be wired to the
inverter’s input, and also allows a dedicated panel (sub-panel) between the
inverter’s output wiring and the AC loads. To access and view the AC terminal
blocks and ground screw, remove the four Phillips screws holding the AC
wiring access cover (see Figure 1-1, Item 1).
Each connection on the AC terminal block is rated to accept one #14 to #6
AWG (2.1 to 13.3 mm
2
) CU stranded wire, or two #12 AWG (3.3 mm
2
) CU
stranded wires. Each connection uses a M3.5 slotted head screw, and the
maximum tightening torque is 16 lbf-in (1.8 N-m).
CAUTION:
The AC input neutral terminal (N) is electrically isolated
from the AC output neutrals terminals (N1/N2) while inverting. This
is related to the neutral-ground bonding requirement and helps
prevent ground-loops. The input neutral and output neutrals must
not an any time be connected together or damage to the inverter
may occur.
Info:
To comply with ABYC requirements for marine installations, the
AC terminal blocks have a stainless steel wire protector to prevent
wire damage from the set-screw.
The AC ground uses a Phillips head screw. If wiring multiple grounds
(i.e., input and output ground connections), use a pressure or mechanical
connector to attach the wires to the AC ground screw.
2.5.5 AC Conductor Wiring Steps
The following sections are basic guidelines for installing and connecting the
AC wiring to and from the CSW2012-X inverter.
WARNING:
Before making any AC connections, make sure the
inverter is disconnected from the battery and no AC power is
connected to the inverter.
Before wiring:
a) Remove the AC access cover (Figure 1-1, Item 1) by unscrewing the four
screws located at the front of the AC compartment cover—to access the AC
terminal blocks.
b) Place strain relief clamps on the AC openings (Figure 1-2, Item 7).
c) After all wires are routed through the AC openings on the inverter, tighten
the strain relief clamp securely on the wires—always leave a little extra slack
in the wiring.
Wiring the Inverter AC Input
1. Route the AC input wires (hot, neutral, and ground) from the AC electrical
main panel through one of the strain relief clamps on the inverter.
2. Connect the hot wire (BLACK) from the main panel’s dedicated 30A
breaker to the inverter’s AC input “L” terminal.
Note: A 20A breaker can be
used if only connecting the L1/N1 output terminals (see Wiring the Inverter
AC Output section on next page).
3. Connect the neutral (WHITE) from the main panel’s neutral busbar to the
inverter’s AC input “N” terminal.
