Tettex TTR 2795, Руководство по эксплуатации

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16 Connection and Setup
CTs are measured by energizing the secondary and measuring on the primary. For “ring” type current transformers
connect the system as follows:
Figure 8 : Connecting to a Ring CT
For core type current transformers, the “H” connections should be made to the secondary (Low current side) and the
“X” connections made to the primary (High current side). The transformer can then be tested using either single phase
or CT operation.
If the CT has multiple taps, these must be tested individually. Each tap on the secondary is tested in turn, by
connecting the “H” connections to each tap in turn. How this is handled depends on whether the current transformer
provides a single winding with multiple taps, or separate secondary windings.
Figure 9 : Connecting to Tapped Current Transformers
If the transformer is equipped with a tapped secondary, it is also possible to test the secondary by connecting it as an
auto-transformer to evaluate the relationship between the individual taps.