VAMP 59 - Page 50

2.5 Overcurrent protection I>
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2 Protection functions
Technical description
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Inverse time limitation
The maximum measured secondary current is 50xI
N
. This
limits the scope of inverse curves with high pick-up settings.
See chapter 2.14 for more information.
Cold load and inrush current handling
See chapter 3.3.
Setting groups
There are two settings groups available for each stage.
Switching between setting groups can be controlled by digital
inputs, virtual inputs (communication, logic) and manually.
Figure 2-5 Block diagram of the three-phase overcurrent stage I>.
Figure 2-6 Block diagram of the three-phase overcurrent stage I>> and
I>>>.