ABB RELION 620 Series Technical Manual page 239

1MRS757644 F
620 series
Technical Manual
A070982 V1 EN
Figure 113: Functionality of numerical multiple-stage overcurrent protection
The coordination plan is an effective tool to study the operation of time selective
operation characteristics. All the points mentioned earlier, required to define the
overcurrent protection parameters, can be expressed simultaneously in a coordination
plan. In Figure 114, the coordination plan shows an example of operation
characteristics in the LV-side incoming feeder and radial outgoing feeder.
Section 4
Protection functions
233