Chapter 3—Installation
25
CM
CM
PTs
CPT
CM CM
CTs
CTs
CTs CTs
Figure 3-11: Circuit monitors connected to one set of PTs and one CPT
Wiring Multiple Circuit Multiple circuit monitors can share one set of 3-phase PTs. Also, multiple
Monitors to a Single Set circuit monitors can share a single control power transformer (CPT). In all
of PTs/CPT cases, each circuit monitor must use a separate set of CTs. Figure 3-11 shows
how to connect multiple circuit monitors to a single set of PTs and CPT.
Note: When using this wiring method, ground the PT secondaries in only one
location.
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