The Ratio that is applied to the current channels, is also applied to the Power and kWh calculators in the energy
metering system. Setting the Ratio then effectively adjusts all calibration factors within the energy metering
system
Wiring Diagram for Current Transformer Inputs (showing terminal block for 1A / 5A CT’s)
Rogowski Coils
Rogowski coils (sometimes referred to as flexible CT’s) are support natively on the ZDR. They are easy to install,
particularly in situations where there are multiple conductors per phase, or when the conductor size is not
known in advance of starting the installation.
Arrows indicating what the direction of current flow should be molded into the plastic of the Rogowski coils as
shown below, in slightly different locations depending on the coil type.
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