226 9424200994 Rev N
Voltage
Figure 159 illustrates the Power Quality, Voltage screen.
Figure 159. Power Quality, Voltage Screen
10-Second Frequency
A 10-second average of the frequency is calculated using Equation 24.
Equation 24. 10-Second Frequency Calculation
Example
Number of integral cycles: 501 cycles over 10 s
Total duration of the 501 cycles: 9.998 s
10-Second Frequency = 501/9.998 = 50.1100 Hz
Distortion
The voltage during a dip is often distorted. This distortion may be important for understanding the effect of
the dip on the system. The BE1-11g calculates distortion using Equation 25
.
1× 100
Equation 25. Distortion Calculation
Figure 160 illustrates the Power Quality, Distortion screen.
Figure 160. Power Quality, Distortion Screen
Dip/Swell
Figure 161 illustrates the Power Quality, Dip/Swell screen. A green LED indicates that the threshold
specified in Power Quality Settings has been exceeded.
Power Quality BE1-11g
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