Page 12 of 27 MCM-Inst-1.10
■
MeterConfig
= 20 for any CT around L2
■
MeterConfig
= 30 for any CT around L3
○
With one CT, assign
MeterConfig
as follows:
■
The load connected from L1 (ØA) to L2 (ØB) and the CT around L1:
MeterConfig
= 40
■
The load connected from L1 (ØA) to L2 (ØB) and the CT around L2:
MeterConfig
= 70
■
The load connected from L2 (ØB) to L3 (ØC) and the CT around L2:
MeterConfig
= 50
■
The load connected from L2 (ØB) to L3 (ØC) and the CT around L3:
MeterConfig
= 80
■
The load connected from L3 (ØC) to L1 (ØA) and the CT around L3:
MeterConfig
= 60
■
The load connected from L3 (ØC) to L1 (ØA) and the CT around L1:
MeterConfig
= 90
For loads with more than one CT, we recommend keeping all CTs on the same submeter block.
3.2.3 Single-Phase, Three-Wire (Split-Phase)
This is the typical North American residential service at 120/240 Vac with a neutral connection. Load
#1 is three-wire, with neutral, measured with two CTs. Load #2 is two-wire, with neutral, measured
with one CT. Load #3 is two-wire, line to line, without neutral, measured with one CT.
V
B
V
C
V
N
V
A
CT2
ADDR+1
ADDR+0
CT1
CT3
CT2 CT1
CT3
Load #1
Load #2
Load #3
Additional Loads
Earth
L2 L1 N
Meter Power
Figure 5: Single-Phase, Three-Wire
This service supports the following types of loads:
●
Single-phase, line-to-neutral
: This is metered with a single CT, as illustrated for load #2. The
MeterConfig
registers may need to be changed.
○
MeterConfig
= 10 if the CT is around L1
○
MeterConfig
= 20 if the CT is around L2
●
Single-phase, two-wire, line-to-line, without neutral
: See
●
Single-phase, three-wire, line-to-line, with neutral
: This is metered with two CTs, as illustrated
for load #1. The
MeterConfig
registers may need to be changed.
○
MeterConfig
= 10 for the CT around L1
○
MeterConfig
= 20 for the CT around L2
For loads with more than one CT, we recommend keeping all CTs on the same submeter block.
