GE F650 - Page 90

3-24 F650 Digital Bay Controller GEK-106310AE
3.1 ENERVISTA 650 SETUP SOFTWARE INTERFACE 3 HUMAN INTERFACES. SETTINGS & ACTUAL VALUES
3
Frequency and miscellaneous menu will be available at Protection Element section only for firmware version 7.50 or above.
3.1.8.5 CONTROL ELEMENTS
This option shows all the control elements available in the relay as shown in Table 3.13: and Table 3.14:. Some of the
elements are grouped ones such as underfrequency, overfrequency and broken conductor. Users should take into account
that position of different Enervista 650 PC Menus could vary depending on relay firmware version.
Table 3.13: GENERAL OVERVIEW OF CONTROL ELEMENTS MENU FOR FIRMWARE VERSION BELOW 7.50
FREQUENCY
Underfrequency Underfrequency unit (81U).
Overfrequency Overfrequency unit (81O).
Frequency Rate of
change
Frequency rate of change function (81R).
MISCELLANEOUS
Broken conductor
Broken or fallen conductor detection function (I2/I1). Grouped element.
Ratio between the negative sequence current, I2, and the positive
sequence current I1. In normal and balanced load situations, this ratio is
zero, while in severe load fault conditions, an unbalance is produced and
this ratio is increased.
Locked Rotor Locked rotor detection function (48).
Load Encroachment Load Encroachment function.
CONTROL
ELEMENTS
Setting Group
F650 units incorporate a flexible grouping capability for protection units.
This means that protection units can be used in either single setting
group (default mode-all units can operate simultaneously) or three
setting groups (in this mode, protection units are grouped in three
independent tables, with only one of them active at a given time).
Protection element grouping involves only Protection elements together
with broken conductor detection and over and under frequency, which
are usually considered as control elements. The rest of control elements
such as recloser, fuse failure, breaker failure, synchronism, and breaker
settings are not involved in the tabled groups concept.
Underfrequency Underfrequency unit (81U). Grouped element
Overfrequency Overfrequency unit (81O). Grouped element
Synchrocheck Synchronism check unit (25). Not grouped, a single unit provided
Autoreclose Recloser (79). Not grouped, a single unit provided
Breaker Failure Breaker failure (50BF). Not grouped, a single unit provided.
VT Fuse Failure Fuse Failure (VTFF). Not grouped, a single unit provided.
Broken Conductor
Broken or fallen conductor detection function (I2/I1). Grouped element.
Ratio between the negative sequence current, I2, and the positive
sequence current I1. In normal and balanced load situations, this ratio is
zero, while in severe load fault conditions, an unbalance is produced and
this ratio is increased.
Locked Rotor Locked rotor detection function (48). Grouped element.
Pulse Counters Pulse counters function. 8 counters provided.
Analog Comparators Analog comparator function. 20 analog comparators provided.
Frequency rate of
change
Frequency rate of change function (81R).Grouped element.
Load Encroachment Load Encroachment function. Grouped element.
Max. Number of Starts Maximum Number of Starts (66). Not grouped, a single unit provided.
Digital Counters Up to 8 Digital Counters