GE D60 Instruction Manual page 434

GROUPED ELEMENTS
The phase mho distance function uses a dynamic 100% memory-polarized mho characteristic with additional reactance,
directional, and overcurrent supervising characteristics. When set to "Non-directional," the mho function becomes an
offset mho with the reverse reach controlled independently from the forward reach, and all the directional characteristics
removed.
The phase quadrilateral distance function has a reactance characteristic, right and left blinders, and 100% memory-
polarized directional and current supervising characteristics. When set to "Non-directional," the quadrilateral function
applies a reactance line in the reverse direction instead of the directional comparators.
Each phase distance zone is configured individually through its own setting menu. All of the settings can be independently
modified for each of the zones except:
• The
SIGNAL SOURCE
5
ELEMENTS  SETTING GROUP 1(6)  DISTANCE
• The
MEMORY DURATION
GROUPED ELEMENTS  SETTING GROUP 1(6)  DISTANCE
The common distance settings described earlier must be chosen properly for correct operation of the phase distance
elements.
Although all zones can be used as either instantaneous elements (pickup [
time-delayed elements (operate [
tripping mode.
— All phase distance zones are reversible. The forward direction is defined by the
PHS DIST Z1 DIR
whereas the reverse direction is shifted 180° from that angle. The non-directional zone spans between the forward reach
impedance defined by the
PHS DIST Z1 REV REACH
PHS DIST Z1 SHAPE
characteristics. The selection is available on a per-zone basis. The two characteristics and their possible variations are
shown in the following figures.
5-220
PHS DIST Z1

SUPV: 0.200 pu
PHS DIST Z1 VOLT

LEVEL: 0.000 pu
PHS DIST Z1

DELAY: 0.000 s
PHS DIST Z1 BLK:

Off
PHS DIST Z1

TARGET: Self-reset
PHS DIST Z1

EVENTS: Disabled
setting (common for the distance elements of all zones as entered under
setting (common for the distance elements of all zones as entered under
] FlexLogic operands), only zone 1 is intended for the instantaneous under-reaching
OP
Ensure that the Phase VT Secondary Voltage setting (see the
menu) is set correctly to prevent improper operation of associated memory
 VOLTAGE BANK
action.
and
PHS DIST Z1 REACH
and
PHS DIST Z1 REV REACH RCA
— This setting selects the shape of the phase distance function between the mho and quadrilateral
Range: 0.050 to 30.000 pu in steps of 0.001
Range: 0.000 to 5.000 pu in steps of 0.001
Range: 0.000 to 65.535 s in steps of 0.001
Range: FlexLogic operand
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
)
)
] and dropout [
PKP
settings, and the reverse reach impedance defined by
PHS DIST Z1 RCA
as illustrated in the following figures.
D60 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS
SETTINGS  GROUPED
SETTINGS 
] FlexLogic operands) or
DPO
SETTINGS  SYSTEM SETUP  AC INPUTS
PHS DIST Z1 RCA
setting,