GE Multilin W650 Instruction Manual page 166

5.4 PROTECTION ELEMENTS
The W650 elements incorporate also the following control elements:
1 x SETTINGS GROUP
4 x OVERFREQUENCY (81O)
4 x UNDERFREQUENCY (81U)
1 x AUTORECLOSE (79)
1 x BREAKER FAILURE (50BF)
1 x FUSE FAILURE (VTFF)
W650 elements incorporate a flexible grouping capability for protection ELEMENTS. This means that protection elements
can be used in either one of the following modes:
a) SINGLE SETTING GROUPS
In this operation mode, all protection elements can be activated and operated simultaneously.
b) FOUR SETTING GROUPS
In this mode, protection elements are grouped in four independent tables with only one active at a given time.
5
5-26 W650 Wind Generator Protection System
5 SETTINGS
GEK-113032A