PRO EM235 QuickStart
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ELECTRICAL CONNECTIONS
The following steps (Figure 3) correspond with a low-voltage three phase network:
1.
Make sure all power sources are disconnected.
2.
Make sure that your designated power supply corresponds with the unit's rating.
3.
Connect the power supply (bottom-left of front panel) via 12 AWG wires and a
designated circuit breaker.
4.
Standard external current transformers: connect the CT's (14 AWG minimum) "
+
" pole to
the device's
I1+
current input (unit’s bottom right of front panel, as in figure 3) and the "-
" pole to the adjacent I1- current input. Repeat this for the following two phases,
I2
and
I3
. Verify proper polarity in your connections in accordance with the arrow printed on
the external CTs.
“HACS” CTs: connect the red/white wire to the "
+
" terminal and the black/orange (colors
vary according to the CT model) wire to the "
-
" terminal.
5.
Connect the voltage measurement inputs (22-12 AWG; bottom-center of front panel).
6.
Connect the com wire (26-12 AWG, shielded) to COM1 (RS485, top-left of front panel).
7.
Power-on the unit.
Figure 3
: Typical wye installation
