General Information
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CENTRON® Polyphase Meter Technical Reference Guide
General Description
The CENTRON meter family is a solid-state, polyphase meter used for measuring electrical
energy consumption. The CENTRON incorporates a two-piece design combining a base
metrology with a variety of personality modules that snap on the standard meter base.
Utilizing the Hall Effect technology for accurate power measurement, the metrology portion
of the meter contains all measurement circuitry and calibration information, while the
personality modules contain the register functionality and communication mediums.
Each version of the meter is distinguished by the various personality modules that mount to
the standard meter metrology base. The personality modules available include the following
versions:
Energy only—CP1S (LCD)
Energy only with radio frequency AMR—CP1SR
Demand/TOU/LP—CP1SD/T/L
Demand/TOU/LP & RF—CP1SR2/R3
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Physical Description
The CENTRON Polyphase meter features a common meter base to which various
personality modules are attached. The cover is polycarbonate.
Meter Base
The CENTRON Polyphase meter base contains all of the measurement circuitry and
calibration information on the metrology board.
The meter base assembly includes three current conductors, three flux-directing cores, three
Hall Effect devices, the metrology circuit board, and the ultrasonically welded module
support. The base also contains three metal oxide varistors (MOV), which are used to
protect the meter from line surges.
