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CET Electric Technology
interface with external CTs with 5A output. The PMC-592 also supports the ability to configure individual
CT Ratio for each Branch Circuit, thus allowing the users to connect various load types with different
Primary Currents to the PMC-592’s Branch Circuits. Please refer to the following diagram on how to
connect external CTs with 5A output to PMC-592’s 5A CT Strip.
Figure 2-42 How to wire External CTs with 5A output with PMC-592’s 5A/10A CT Strip
2.4.3 Branch Circuit Wiring and Sub Meter Assignment
The PMC-592 supports two
Installation Modes
for CT Strips – Sequential and Cross-over. The following
sections illustrate the relationship between each Branch CT and its corresponding Sub Meter (SM)
assignment. The numbers inside each of the CT Strips are the Branch CT numbers. The numbers outside
the CT Strip represent their respective 1-Ø SM assignments based on the
Installation Mode (Sequential
or Cross-over)
,
CT Strip Installation Direction
(Top or Bottom)
and
CT Strip Polarity (Normal or
Reverse)
.
2.4.3.1 Sequential Installation Mode
The PMC-592 supports three
Sequential
installation modes. The following diagrams illustrate the details.
Note:
The CT Strips are located next to the breakers, and the spacing between CTs and breakers should be consistent.
Horizontal Configuration:
Installation Mode (Reg. # 6520): 0 =
Sequential Mode
CT Strip A Installation Direction (Reg. #
6525): 0 =
Top
CT Strip B Installation Direction (Reg. #
6526): 0 =
Top
CT Strip C Installation Direction (Reg. #
6527): 0 =
Top
CT Strip D Installation Direction (Reg. #
6528): 0 =
Top
CT Strip A Polarity (Reg. #
6521): 0 =
Normal
CT Strip B Polarity (Reg. #
6522): 0 =
Normal
CT Strip C Polarity (Reg. #
6523): 0 =
Normal
CT Strip D Polarity (Reg. #
6524): 0 =
Normal
Table 2-6 Sequential Mode I