pplication Notes
P74x/EN AP/N
1, P742, P743 (AP) 6-
Function Keys 4 and 5 are set to ‘Toggle’ mode and on activation of the key, the
commissioning mode will be in service as long as the function has been enabled in the
“Configuration” menu. The associated LED will indicate the state of the protection function in
service as GREEN and YELLOW for the 50BF disable mode and RED for the Overhaul
mode.
9.2 Differential current display
When the differential currents are low, it is possible to force to 0 the value of these
differential currents displayed in the column MEASUREMENT 1 & MEASUREMENT 2.
When the differential currents of a zone are all lower than the threshold (on the 3 phases),
the currents displayed are forced to 0.
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