Siemens 7SG164 Ohmega 400 Series Manual page 104

3 MEASURING UNITS TESTS
3.1 Voltage Measurement
Apply A.C. voltage to each of the voltage input circuits of the relay using the A.C. variable voltage sources or
portable relay test set. The relay should display the correct value of voltage, the value measured by the relay is
displayed in the Instrument Menu; with ± 5% accuracy. The applied A.C. volts can be in the range of 5 – 220Vrms.
Nominal voltage of 63.5V or 110V is recommended.
3.2 Current Measurement
Apply A.C. current to each current input circuit of the relay using a variable current source. The relay should
display the correct value of current, the value measured by the relay is displayed in the Instrument Menu; with ±
5% accuracy.
©2010 Siemens Protection Devices Limited
7SG16 Ohmega 402 60 Commissioning
Chapter 9 Page 6 of 19
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