Maretron ACM100 user manual AC Source, Single-Phase Phase A Connection, Revision, Page

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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.

Line (Phase A)

AC Source

Neutral

Current

Transducer

Fuse										+	+
										U.S.	Europe
										120 Volts	220 Volts
										60Hz	50Hz
										-	-
										ACM100 Screw Terminals
1	2	3	4	5	6	7	8	9	10 11 12
ALine	BLine	CLine	ANeutral	BNeutral	CNeutral	A+	A-	B+	B- C+	C-
						I I I I I I
V V V V V V

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:

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