Maretron ACM100 - Manual (Page 9)

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WARNING: If the supplied current transformer is placed around a wire carrying
AC current, then extremely high voltages can develop on the output leads of the
current transformer, with severe risk of electrocution. For safety, keep the output
leads of the current transformer(s) shorted or tied together until they are
connected to the proper terminals on the ACM100.
WARNING: User supplied voltage sense cables must be 18 gauge or larger,
have insulation rated to 600V, and must have the conductor connected to the
hot lead of the AC power source protected by a fuse rated at 3A or less (the
current consumed by the voltage sense circuit on the ACM100 is negligible, at
less than 10mA).
Before attempting to connect the ACM100 to the AC source, determine the type of system you
will be monitoring. The ACM100 supports the connection and monitoring of three different
system types; 1) single-phase single line system (Section 2.4.2.1), or 2) single-phase dual line
system (Section 2.4.2.2), or 3) three-phase system (Section 2.4.2.3).
2.4.2.1 Single-Phase (Phase A) Connection
Please refer to Figure 3 for connecting the ACM100 to a single phase, single line system.
Current
Transducer
Revision 1.2 Page 5
Figure 3 – Single-Phase (Single Line) Connection Diagram
Use the following instructions when you are connecting the ACM100 to a single-phase circuit
connected via one (hot) phase wire and one neutral wire. You will need to install one current
transformer and one voltage sense cable.
Step 1: De-energize the AC Source.
Step 2: The Current Transformer has black and white wires. Install the Current Transformer as
follows:
Line (Phase A)
Neutral
U.S.
120 Volts
60Hz
+
-
Europe
220 Volts
50Hz
+
Fus
e
-
AC Source
1 2 5 4 3 6 7 8 9 10 11 12
V
A
Li
ne
V
A
Ne
u
tra
l
V
B
Li
ne
V
C
Li
ne
V
B
Ne
u
tra
l
V
C
Ne
u
tra
l
I A+ I A- I B+ I B-
I C+ I C-
ACM100 Screw Terminals