Appendix K: Additional PX3 Information
686
Altitude (meters)
Altitude (feet)
Correction factor
425 1394
1.00
500 1640
1.01
740 2428
1.04
1500 4921 1.15
2250 7382 1.26
3000 9842 1.38
Unbalanced Current Calculation
Unbalanced current information is available on 3-phase models only.
This section explains how the PX3 calculates the unbalanced current
percentage.
Calculation:
1.
Calculate the average current of all 3 lines.
Average current = (L1+L2+L3) / 3
2.
Calculate each line's current unbalance by having each line current
subtracted and divided with the average current.
L1 current unbalance = (L1 - average current) / average
current
L2 current unbalance = (L2 - average current) / average
current
L3 current unbalance = (L3 - average current) / average
current
3.
Determine the maximum absolute value among three lines' current
unbalance values.
Maximum (|L1 current unbalance|, |L2 current unbalance|,
|L3 current unbalance|)
4.
Convert the maximum value to a percentage.
Unbalanced
load
percent
=
100
*
maximum
current
unbalance
Example:
Each line's current:
L1 = 5.5 amps
Summary of Contents for PX3-1000 series
Page 5: ......
Page 92: ...Chapter 4 Connecting External Equipment Optional 70...
Page 668: ...Appendix J RADIUS Configuration Illustration 646 Note If your PX3 uses PAP then select PAP...
Page 673: ...Appendix J RADIUS Configuration Illustration 651 14 The new attribute is added Click OK...
Page 674: ...Appendix J RADIUS Configuration Illustration 652 15 Click Next to continue...