4.7.3 NEL # over-current
These non-essential load trips (NELs) are for over-current protection. The over-current trip may,
for example, be activated by inductive loads and an unstable power factor (PF < 0.7), which
increase the current.
The trip response is based on the highest phase current true RMS values from the source, as
measured by the controller.
By default, up to three NEL trips are available.
These parameters are only visible if the non-essential loads are configured on the single line diagram.
Configure the parameters under Configure > Parameters > Non-essential load trip > Trip # > Over-current, where # is 1, 2 or 3.
Table 4.21
Default parameters
Parameter Range Trip 1 > Over-current Trip 2 > Over-current Trip 3 > Over-current
Set point 50 to 200 % of nominal current 100 % 100 % 100 %
Delay 0.1 s to 1 h 5.0 s 8.0 s 10.0 s
Enable Not enabled, Enabled Not enabled Not enabled Not enabled
Action* Warning Warning Warning
*Note: The NEL function also trips NEL #. You cannot reconnect the NEL until the alarm is deactivated. The alarm action cannot be
changed.
Inhibits: The trips are inhibited if the breaker to the busbar is open.
4.7.4 NEL # under-frequency
These NEL trips are for busbar under-frequency protection.
The trip response is based on the lowest frequency in the 3-phase voltage from the busbar, as
measured by the controller.
By default, up to three NEL trips are available.
These parameters are only visible if the non-essential loads are configured on the single line diagram.
Configure the parameters under Configure > Parameters > Non-essential load trip > Trip # > Under-frequency, where # is 1, 2
or 3.
Table 4.22
Default parameters
Parameter Range Trip 1 > Under-frequency Trip 2 > Under-frequency Trip 3 > Under-frequency
Set point
70 to 100 % of nominal
frequency
95 % 95 % 95 %
Delay 0.1 s to 1 h 5.0 s 8.0 s 10.0 s
Enable Not enabled, Enabled Not enabled Not enabled Not enabled
Action* Warning Warning Warning
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