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Introduction
The Polaris is a versatile revenue grade digital energy meter. It has universal support for the most common types of
phase/wire combinations. It is also multi-function and can measure not only the kWh, but also the kW, voltage, current,
kVArh, power factor and frequency; all its measured parameters is readable through its optional RS485 communications
interface using the Modbus protocol.
The measured current cannot be directly inputted into the Polaris. It requires external current transformers (CT), and
can be matched with a wide selection of dedicated CTs for current measurement values of 5A to 400A. The CTs are
available in solid core, split core or clamp type; each with its own advantages depending on requirements as shown in
the table below:
Appearance
Size
Cost
Installation
Available Ratings
Application
The dedicated CTs for use with the Polaris is available only from DAE and needs to be preselected together with the
model during ordering. For installations with pre-existing CTs or if larger capacities is required, the user should choose
the dedicated 5A CT and connect the user provided CT to the dedicated 5A CT. See the section on using a standard 5A
output CT for details.
In addition to its basic measurement capability, it is also available with a variety of options for different applications
including RS485 communications interface, prepaid smart card reader, relay driver output, online prepaid capability,
customizable discrete input and output.
Its RS485 interface allows it to be read remotely as part of a simple auto meter reading system or even form the
basis of a comprehensive energy monitoring system.
The Polaris can also be used as a prepaid meter with the optional ICR815L smart card reader and an external relay;
it can even form the basis of an online prepaid metering and remote disconnection system with its online prepaid
capability.
The Polaris is also equipped with both a discrete input and output that can be used for special purpose applications
as part of a custom designed ODM model.
Polaris Userʼs Manual 1.3e"
Solid Core
very small to small
cheap to low
interrupts power
5A, 200A
permanent installation
Split Core
small
moderate
no power interruption
no power interruption
5A, 50A, 100A, 200A
permanent or semi-
permanent installation
Clamp Type
medium
expensive
400A
temporary measurement or
when up to 400A current rating
is needed
2/11
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