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11/22 750.2189 Rev. B
4/12
EMIU 1500W Mini Inverter
a. Unit can be configured for either 120V in // 120V out or 277V in // 277V out.
b. Power applied to the UNSWITCHED INPUT charges the batteries.
c. The SWITCHED INPUT can be configured to operate Normally-On, Normally-Off or Switched loads.
d. Power supplied to the switched input must be fed from the same branch circuit as the unswitched input (see figure 2).
e. Unit is shipped from factory pre-set for 120V in // 120V out and configured for Normally-On load operation (see figure 2). This
configuration can be changed to fulfill customer's application.
f. In Normal AC mode, the load connected at the output is powered by the power applied to the SWITCHED INPUT.
g. In Emergency mode, the load is powered by the battery through the inverter. The inverter converts the battery DC power to AC
power.
a. Output voltage of the Mini Inverter can be configured for either 120VAC or 277VAC.
b. Identify the terminal block TB1 located on the bottom of the electronic cabinet.
c. Position of the red wire determines the voltage available at the output of the Mini Inverter.
i. When the red wire is connected at the left terminal of TB1, the output voltage available will be 120VAC.
ii. When the red wire is connected on the right terminal of TB1, the output voltage available will be 277VAC.
d. Identify the voltage rating of all the loads to be powered by the Mini Inverter.
i. If the voltage rating of the loads is 120VAC, connect the red wire to the left terminal of TB1.
ii. If the voltage rating of the loads is 277VAC, connect the red wire to the right terminal of TB1.
a. Connect the Ground wire to the Ground Bus Bar.
b. Identify the terminal block for UNSWITCHED INPUT (figures 5, 6 or 7).
c. Connect the NEUTRAL wire to the NEUTRAL position of the UNSWITCHED INPUT terminal block.
d. Connect AC Line wire
i. 120V supply: connect AC line wire to the 120V position of the UNSWITCHED INPUT terminal block.
ii. 277V supply, connect AC Line wire to the 277V position of the UNSWITCHED INPUT terminal block.
ELECTRICAL SINGLE LINE DIAGRAM FOR EMIU 1500W SINGLE CIRCUIT
STEP 2: CONFIGURATION OF OUTPUT VOLTAGE (SEE FIGURE 2 AND 3)
STEP 3: WIRING TO UNSWITCHED INPUT
WARNING:
ENSURE THE BRANCH CIRCUIT BREAKER FEEDING THE UNIT IS TURNED OFF AT THE SERVICE
PANEL BEFORE WIRING.
FIGURE 2
Circuit: Normally-ON
Normal Utility Panel
120V
Neutral
Ground
Neutral(Wht)
CHARGER
BATTERY
24VDC
INVERTER
120VAC(BLK)
277VAC(ORG)
SWITCHED INPUT
UNSWITCHED
INPUT
OUTPUT
HOT
NEU
120VAC(BLK)
Neutral(Wht)
Neutral(Wht)
120V(BLK)
277V(ORG)
F1
Mini Inverter comes pre-wired
for 120V. For 277V connections
remove red wire from
120V terminal and wire
to 277V terminal.
Transformer
Configuration:120Vin//120Vout
Orange
Black
Red
TO OBTAIN
120Vac OUTPUT
CONNECT RED WIRE
POSITION TO OBTAIN
TO OBTAIN
277Vac OUTPUT
Orange
Black
Red
FIGURE 3
TB1
TB1
CORRESPONDING OUTPUT VOLTAGE
TO APPROPRIATE
3
4
