YOKOGAWA WT310EH - Page 109

App-3
IM WT310E-01EN
Appendix
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App
Index
• Onthisinstrument,S,Q,λ,andΦarederivedthroughthecomputationofthemeasuredvaluesofvoltage,
current, and active power. Therefore, for distorted signal input, the value obtained on this instrument may
differ from that obtained on other instruments that use a different method.
• ForQ,whenthecurrentleadsthevoltage,theQvalueisdisplayedasanegativevalue;whenthecurrent
lagsthevoltage,theQvalueisdisplayedasapositivevalue.ThevalueofQΣmaybenegative,because
it is calculated from the Q of each element with the signs included.
Appendix 1 Symbols and Determination of Measurement Functions