GE AF-300 P11 User Manual

Contents

8-4 Data subject to change without notice 7/07. © 2007 GE Drives8.3 Main Circuit MeasurementsThe indicated values depend on the type of meter, because the harmonic component is included in the voltage andcurrent of the main circuit power (input) and the output (motor) side of the inverter. If measuring with a meter for commer-cial power frequency use, use the meters shown in Table 8.3.1.The power factor cannot be measured using power factor meters currently available on the market, which measure thephase difference between voltage and current. If power factors must be measured, measure the power, voltage, andcurrent on the input side and output side, then calculate the power factor using the following formula:Table 8.3-. Meters for Measuring Main CircuitItem Input (power supply) Side Output (motor) Side DC Link CircuitVoltageP(+) - N(-)Voltage Current Voltage CurrentMeter name Ammeter Voltmeter Powermeter Ammeter Voltmeter Powermeter DC VoltmeterAR,S,T VR,S,T WR,S,T AU,V,W VU,V,W WU,V,W VMeter type Moving iron Rectifier or Digital Moving iron Rectifier Digital power Moving coil typetype moving-iron power meter type type metertypeSymbolNote: If the output voltage is measured with a rectifier type meter, an error may occur. Use a digital AC power meter toensure accuracy.Power factor = Power [W] x 100 [%]3 x Voltage [V] x Current [A]