DOC. SIE10110 Rev. 6 Page 14 of33
3.5.3 Other measurements
Starting from the above measurements, the test set can compute derived measurements, according
to test selection.
The following is the list of available measurements. For all of them the following range and
resolution applies; the accuracy is the sum of voltage, current and possibly angle accuracy.
For the CT, VT and PT ratio measurement, the following applies.
- Range: 9999;
- Accuracy: 0.5 typical; 1% maximum.
For the polarity test, the phase shift between the two parameters is tested. Answer is OK if phase
shift is less than 10°.
For the resistance, we measure up to 250 Ohm at 50 mA; the accuracy is: 0.5 typical; 1%
maximum.
3.6 EXTERNAL INPUTS MEASUREMENT
- It is possible to meter the current and the voltage of an external (or internal) generator.
- Input connection: by four safety sockets; three for current and two for voltage.
- Metering circuits are isolated between them and from the rest of the instrument.
3.6.1 Current measurement
- Two inputs: 20 mA or 10 A AC.
- Range, resolution, accuracy: see tables below.
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