CPC 100 V 3.20
Transformer - 4
Transformer
The IEC 61378-1 is a standard for testing transformers with unconventional vector groups.
Activate the IEC 61378-1 check box to perform a measurement according to this standard. The
test is vector-group independent.
Note: The IEC 61378-1 check box is only available if the CP SB1 switch box is connected.
With the IEC 61378-1 check box activated, the CPC 100 carries out two standard-compliant
measurements for each winding and calculates the transformer’s turns ratio and phase shift.
The measurement table displays the same values as for the standard TRRatio measurement.
The magnetization current and phase angle will not be available in this mode.
Note: The IEC 61378-1 test takes longer than a standard ratio measurement.
Use the Vector Group Check test card to automatically determine the transformer’s vector
group. To start the Vector Group Check, enter the test voltage and frequency in the VG-Check
test card.
Note: The Vector Group Check test requires a CP SB1 transformer switch box.
The CPC 100 energizes the transformer’s primary windings and measures the voltages on the
secondary terminal. The optimized algorithm reduces the number of measurements. The vector
group is determined according to the voltage distributions. In cases where the measurement
results apply equally to two vector groups, an alternative group is provided.
DANGER
Death or severe injury caused by high voltage or current
During the Vector Group Check, the CPC 100 continuously puts out the set test
voltage.
► Do not touch the CPC 100’s outputs and do not touch or unplug any cables.
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