socomec Continental Control Systems MCM MB Series, Руководство по установке

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MCM-Inst-1.10 Page 11 of 27
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MeterConfig = 10 for the CT around L1
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MeterConfig = 20 for the CT around L2
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MeterConfig = 30 for the CT around L3
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Single-phase, two-wire, line-to-line, without neutral: See 3.2.2 Three-Phase, Three-Wire
Delta below for details.
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Single-phase, three-wire, line-to-line, with neutral: See 3.2.3 Single-Phase, Three-Wire
(Split-Phase) below for details.
For loads with more than one CT, we recommend keeping all CTs on the same SMB.
3.2.2 Three-Phase, Three-Wire Delta
This service is common in commercial and industrial settings. It does not include a neutral conductor.
Load #1 is three-phase, three-wire, delta, measured with three CTs. Load #2 is three-phase, three-
wire, delta, measured with two CTs. Load #3 is single-phase, line-to-line, and measured with one CT.
V
B
V
C
V
N
V
A
CT2
ADDR+1 ADDR+0
CT1 CT3 CT2 CT1 CT3
Additional Loads
L3 L2 L1
Meter Power
Load #1,
3Ø
Load #2,
3Ø, 2 CTs
Load #3,
1Ø, 1 CT
Earth
Figure 4: Three-Phase Three-Wire Delta
This service supports the following types of loads:
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Three-phase, three-wire, delta (no neutral): You may meter this with either three or two CTs.
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With three CTs wired as shown for load #1 above, use the default MeterConfig values:
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MeterConfig1 = 10
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MeterConfig2 = 20
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MeterConfig3 = 30
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With two CTs wired as shown for load #2 above, use the following MeterConfig values:
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MeterConfig1 = 90
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MeterConfig2 = 50
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Single-phase, line-to-line: You may meter this with one or two CTs.
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With two CTs, use:
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MeterConfig = 10 for any CT around L1