ACM20 Series
Four-Function AC Power Meters
TYPICAL WIRING DIAGRAMS, CONT.
220 V
LOAD
Epoxy encapsulation
Note: If the ACM20 displays zero Watts with
power applied to the load, reverse the direction
of the wire passing through the CT's center hole.
See Technical Note 6 for more information.
Polarity dot on bottom
B
A
TB1
L1
L2
220 Vac (50/60 Hz)
Figure 2. Wiring diagram for 220/240V systems with no neutral
220 V
LOAD
Epoxy encapsulation
Note: If the ACM20 displays zero Watts with
power applied to the load, reverse the direction
of the wire passing through the CT's center hole.
See Technical Note 6 for more information.
Polarity dot on bottom
B
A
TB1
L1 Neutral L2
220 Vac (50/60 Hz)
Figure 3. Wiring diagram for 220/240V systems with neutral (monitoring L1)
220 V
LOAD
Epoxy encapsulation
Note: If the ACM20 displays zero Watts with
power applied to the load, reverse the direction
of the wire passing through the CT's center hole.
See Technical Note 6 for more information.
Polarity dot on bottom
B
A
TB1
L1 Neutral L2
220 Vac (50/60 Hz)
Figure 4. Wiring diagram for 220/240V systems with neutral (monitoring L2)
www.murata-ps.com/dpm
30 Apr 2010
email: sales@murata-ps.com
MPM_ACM20 Series.A06
Page 4 of 6
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