GE Multilin W650 - Page 87

GEK-113032A W650 Wind Generator Protection System 4-19
4 HUMAN INTERFACES. 4.1 ENERVISTA 650 SETUP SOFTWARE INTERFACE
4
4.1.8.3 PROTECTION ELEMENTS
This option shows all the protection-grouped elements available in the relay as shown in Table 4–9:. Each of these groups
includes the specific protection units of the same type. For example phase currents group includes TOC, IOC, directional
units, etc. There are three groups available, so there are three protection units of each function that can work in grouped
mode or ungrouped (altogether).
Table 4–9: GENERAL OVERVIEW OF PROTECTION ELEMENTS MENU:
Options enabled only in On-line mode are marked as (*). Options enabled only in Off-line mode are marked as (**)
PROTECTION
ELEMENTS
Phase Current All overcurrent grouped functions for phase current.
Neutral Current
All overcurrent grouped functions for neutral current. (Calculated from
phases, not measured)
Ground Current
All overcurrent grouped functions for ground current. (Measured from 4
th
current input)
Sensitive Ground
Current
All overcurrent grouped functions for sensitive ground current.
(Measured from 5
th
current input)
Negative Sequence
Current
Negative sequence time overcurrent function
Voltage Elements
All under and overvoltage grouped functions for phases, neutral,
auxiliary voltage and voltage unbalance.
Power Directional power grouped protection functions.