Quadlogic MiniCloset-5c, Installation Manual, Page: 42 / 117

Chapter 4 Installation
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Quadlogic Controls Corporation
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v. Every CT MUST be connected to an MCI input which is referenced to the correct
phase (see Figure 4-8.)
vi. This type of meter is configured as a Residential meter with (24) single-phase
meters. For these installations, the meter measures (24) single-phase loads. Each
metered load has one CT. The CT from a particular metered load must be connected
to adjacent inputs as shown in the chart. Note that Meter 1 uses phase A, Meter 2
uses phases B, Meter 3 uses phases C, and so on.
Installation Notes
CRITICAL:
The Phase Association and Polarity of the current transformers must be followed or meter will
not be installed correctly.
1. Current transformers must be in phase with Reference Voltage. The MCI runs in an A-B-C
phase rotation and each CT connections repeat an A, B, C pattern.
Meter MCI Board CT Voltage Phase Meter MCI Board CT Voltage Phase
1 1
A
13 13
A
2 2 B 14 14 B
3 3 C 15 15 C
4 4 A 16 16 A
5 5 B 17 17 B
6 6 C 18 18 C
7 7 A 19 19 A
8 8 B 20 20 B
9 9 C 21 21 C
10 10 A 22 22 A
11 11 B 23 23 B
12 12 C 24 24 C
Figure 4-10. CT phase association for single-phase, 2-wire loads.
For example, Current transformer installed in phase with A reference voltage must be installed
on CT1, CT4, CT7, etc. Current transformers installed in phase with B reference voltage must
be installed on CT2, CT5, CT8, etc. Current transformers installed in phase with C reference
voltage must be installed on CT3, CT6, CT9, etc.