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Legrand PDU User Guide 517
Unbalanced current:
Threshold
Default value
Upper critical
10% -- disabled by default
Upper warning
5% -- disabled by default
Hysteresis 2%
Overcurrent protectors which aims to protect the PDU's outlets:
OCP RMS current:
Threshold
Default value
Upper critical
80% of OCP rating
Upper warning
65% of OCP rating
Hysteresis 1A
Total residual current:
Threshold
Default value
Upper critical
30mA
Hysteresis 15mA
Altitude Correction Factors
If a Legrand differential air pressure sensor is attached to your device, the altitude you enter for the device
can serve as an altitude correction factor. That is, the reading of the differential air pressure sensor will be
multiplied by the correction factor to get a correct reading.
This table shows the relationship between different altitudes and correction factors.
Altitude (meters)
Altitude (feet)
Correction factor
0 0 0.95
250 820 0.98
425 1394 1.00
500 1640 1.01
740 2428 1.04
1500 4921 1.15
2250 7382 1.26
3000 9842 1.38
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