Inrush Restraint Operation
Inrush Restraint works by raising the Phase, Earth and NPS threshold current settings for a short period of time to allow the inrush current to subside.
Apart from the On/Off control there are two settings that determine how Inrush Restraint operates as shown in the below:
|
Setting |
Default |
Description |
|---|---|---|
|
Inrush Restraint Time |
0.10 s |
The time Inrush Restraint will remain active once triggered. |
|
Inrush Restraint Multiplier |
X4 |
Setting current multiplier while Inrush Restraint is active. |
-
Inrush Restraint is armed for operation whenever the load current goes to zero.
-
When the load current goes from zero to non-zero, the Inrush Restraint is activated and the Inrush Restraint Multiplier is applied to the Phase, Earth, and NPS pickup thresholds for the Inrush Restraint Time.