GE F650 Instruction Manual page 92

4 HUMAN INTERFACES. SETTINGS & ACTUAL VALUES 4.1 ENERVISTA 650 SETUP SOFTWARE INTERFACE
Sensitive Ground
Directional
NEGATIVE
SEQUENCE
CURRENT
Negative Sequence
TOC
VOLTAGE
ELEMENTS
Phase UV
Phase OV
Neutral OV High
Neutral OV Low
Negative Sequence
OV
Auxiliary OV
Auxiliary UV
POWER
Forward Power
Directional Power
Watt Gnd Flt High
Watt Gnd Flt Low
4.1.8.4 CONTROL ELEMENTS
This option shows all the control elements available in the relay as shown in Table 4.11:. Some of the elements are grouped
ones such as underfrequency, overfrequency and broken conductor.
Table 4.11: GENERAL OVERVIEW OF CONTROL ELEMENTS MENU:
CONTROL
ELEMENTS
Setting Group
Underfrequency
Overfrequency
Synchrocheck
Autoreclose
Breaker Failure
VT Fuse Failure
Broken Conductor
Locked Rotor
Pulse Counters
Analog Comparators
GEK-106310AB
Sensitive ground directional unit (67SG)
Negative sequence time overcurrent (46P)
Phase undervoltage (27P)
Phase overvoltage (59P)
Neutral overvoltage, high level (59NH)
Neutral overvoltage, low level (59NL)
Negative sequence overvoltage (47)
Auxiliary overvoltage (59X)
Auxiliary undervoltage (27X)
Forward power (32FP), in primary values.
Directional power (32), in primary values.
Wattmetric ground fault high (32N High), in secondary values
Wattmetric ground fault low (32N Low), in secondary values
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 unit (81U). Grouped element
Overfrequency unit (81O). Grouped element
Synchronism check unit (25). Not grouped, a single unit provided
Recloser (79). Not grouped, a single unit provided
Breaker failure (50BF). Not grouped, a single unit provided.
Fuse Failure (VTFF). Not grouped, a single unit provided.
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 detection function (48). Grouped element.
Pulse counters function. 8 counters provided.
Analog comparator function. 20 analog comparators provided.
F650 Digital Bay Controller
4
4-19