5-28 W650 Wind Generator Protection System GEK-113032A5.4 PROTECTION ELEMENTS 5 SETTINGS5GROUP 3 ACT ON This signal produces the activation of setting group 3GROUP 4 ACT ON This signal produces the activation of setting group 4These activation signals for the different setting groups are configured using EnerVista 650 Setup at Setpoint > RelayConfiguration > Protection Elements as shown in the figure.Figure 5–3: TABLE CHANGE SIGNALS CONFIGURATION EXAMPLEThe example above uses three digital inputs to perform the table selection, but it is possible to use any other logic signal inthe relay.In case of using digital inputs, the user can select the setting table activating these digital inputs (which could come from thePLC, or from a different relay, or from an auxiliary switch, for adaptive protection). This selection of the active group haspriority over the setting. If several signals are active at the same time, the highest one will be taken as valid. For example, ifselection signals for both groups 1 and 2 are active, the active table will be number 2.The time used in the table change is one PLC logic scan cycle (5 ms typical), allowing a fast adaptation to system changes.Another type of signals are block signals. These are internal relay signals that indicate which groups are active, and whichare blocked. For example, if the setting group function is enabled and setting group 1 has been set as active, block signalsfrom setting groups 2, 3 and 4 will be active, and the block signal that corresponds to group 1 will be inactive because thatgroup is enabled.Block signals are as follows:GROUP 1 BLOCKEDGROUP 2 BLOCKEDGROUP 3 BLOCKEDGROUP 4 BLOCKEDAll signals corresponding to setting Groups, both the activation and the block signals, are located in the Actual > Status >Control Elements > setting Groups menu.
