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2017 Sensata Technologies
Installation
2.3.5 Wiring the AC Input and Output
The MS-PAE provides 120/240 VAC on the output, but the input may be wired either as a 120/240
VAC input or a 120 VAC input (to one input only) depending on the AC source. The AC output
continues to produce 120/240 VAC with either the 120/240 VAC or 120 VAC input con
fi
guration.
WARNING:
DO NOT connect 120 VAC (same phase) to both AC HOT 1 IN and AC HOT
2 IN inputs. These inputs must be 180° out-of-phase (i.e., 120/240 VAC). If you only
have a 120 VAC source, you may connect to either the AC HOT 1 IN or AC HOT 2 IN,
but NOT to both or damage may occur.
WARNING:
Before making any AC connections, make sure the inverter is disconnected
from the battery bank and that no AC power is connected to the inverter.
Info:
If providing only 120 volts to the inverter input, the charger must be turned down
to 50% to prevent overheating from occurring.
CAUTION:
The inverter’s AC output must never be connected to an AC power source.
This could cause severe damage to the inverter and is not covered under warranty.
Info:
Torque the six-connection AC terminal block screws to 16 in lbf (1.8 Nm). Torque
the two AC ground terminal screws to 45 in lbf (5.1 Nm).
The following steps are basic guidelines for installing and connecting AC wiring directly from a
main panel into a MS-PAE Series inverter, and from the inverter directly to a sub-panel.
Note:
If you are installing the MS-PAE inverter(s) on a MMP/MP enclosure, refer to the respective
enclosure owner’s manual for all AC wiring instructions (as an example, Figure 2-9 shows the AC wiring
for a MS-PAE inverter installed on a MMP enclosure).
1. Remove the two Phillips screws on the AC wiring compartment cover (Figure 1-3, Item 15) to
access the internal AC terminal block.
Wiring the Inverter AC Input (from the main panel)
2. a)
For a 120/240 VAC input
: Connect the hot 1 wire (black) from the main panel’s dedicated
dual-pole circuit breaker to the inverter’s HOT 1 IN terminal, and then connect the hot 2 wire
(red) from the main panel’s dual-pole circuit breaker to the inverter’s AC HOT 2 IN terminal.
b)
For a 120 VAC input
: Connect the hot wire (black) from the main panel’s dedicated dual-
pole circuit breaker to the inverter’s AC HOT 1 IN or AC HOT 2 IN terminal, but NOT both or
damage may occur.
CAUTION:
If using only a 120 VAC input source, you will need to turn the charge rate
down to 50% using a remote control (i.e., ME-RC, ME-ARC or ME-RTR). This prevents
the inverter from overheating because of a transformer imbalance when charging the
battery bank and running loads from both the HOT 1 and HOT 2 outputs.
3. Connect the neutral (white) wire from the main panel’s neutral busbar to one of the inverter’s AC
NEUTRAL terminals (both of the inverter’s AC NEUTRAL terminals are common to each other).
4. Connect the safety ground (green) wire from the main panel’s ground busbar to one of the
inverter’s AC GROUND terminals.
Wiring the Inverter AC Output (to the sub-panel)
5. Connect the sub-panel’s hot 1 (black) wire to the inverter’s AC HOT 1 OUT terminal, and then
connect the sub-panel’s hot 2 (red) wire to the inverter’s AC HOT 2 OUT terminal.
6. Connect the sub-panel’s neutral (white) wire to the inverter’s open AC NEUTRAL terminal.
7. Connect the sub-panel’s ground (green) wire to the inverter’s open AC GROUND terminal.
Final Inspection
Gently pull on the wires to ensure they are securely held, and ensure no bare wire is exposed.
The AC input and output wiring in the MS-PAE Series inverter should be complete. Prior to re-
attaching the AC access cover, review all AC wiring to ensure all connections are correct and secure.
