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5-90 L60 Line Phase Comparison Relay GE Multilin
5.5 GROUPED ELEMENTS 5 SETTINGS
5
The phase mho distance function uses a dynamic 100% memory-polarized mho characteristic with additional reactance,
directional, and overcurrent supervising characteristics. The phase quadrilateral distance function is comprised of a reac-
tance characteristic, right and left blinders, and 100% memory-polarized directional and current 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. When set to “Non-directional”, the quadrilateral
function applies a reactance line in the reverse direction instead of the directional comparators.
zones of phase distance protection are provided. Each zone is configured individually through its own setting menu. All of
the settings can be independently modified for each of the zones except:
1. The
SIGNAL SOURCE
setting (common for the phase distance elements of all zones as entered under
SETTINGS
GROUPED ELEMENTS SETTING GROUP 1(6) DISTANCE
).
2. The
MEMORY DURATION
setting (common for the phase distance elements of all zones as entered under
SETTINGS
GROUPED ELEMENTS SETTING GROUP 1(6) DISTANCE
).
The common distance settings described earlier must be properly chosen for correct operation of the phase distance ele-
ments. Although all three zones can be used as either instantaneous elements (pickup [
PKP
] and dropout [
DPO
] Flex-
Logic™ operands) or time-delayed elements (operate [
OP
] FlexLogic™ operands), only Zone 1 is intended for the
instantaneous under-reaching tripping mode. Additional details may be found in Chapter 8: Theory of Operation.
Ensure that the
PHASE VT SECONDARY VOLTAGE
setting (see the
SETTINGS SYSTEM SETUP AC INPUTS
VOLTAGE BANK
menu) is set correctly to prevent improper operation of associated memory action.
• PHS DIST Z1 DIR: All three zones are reversible. The forward direction is defined by the
PHS DIST Z1 RCA
setting,
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 REACH
and
PHS DIST Z1 RCA
settings, and the reverse reach impedance
defined by
PHS DIST Z1 REV REACH
and
PHS DIST Z1 REV REACH RCA
as illustrated below.
• PHS DIST Z1 SHAPE: This setting selects the shape of the phase distance function between the mho and quadrilat-
eral characteristics. The selection is available on a per-zone basis. The two characteristics and their possible varia-
tions are shown in the following figures.
MESSAGE
PHS DIST Z1
DIR COMP LIMIT: 90°
Range: 30 to 90° in steps of 1
MESSAGE
PHS DIST Z1 QUAD
RGT BLD: 10.00 ohms
Range: 0.02 to 500.00 ohms in steps of 0.01
MESSAGE
PHS DIST Z1 QUAD
RGT BLD RCA: 85°
Range: 60 to 90° in steps of 1
MESSAGE
PHS DIST Z1 QUAD
LFT BLD: 10.00 ohms
Range: 0.02 to 500.00 ohms in steps of 0.01
MESSAGE
PHS DIST Z1 QUAD
LFT BLD RCA: 85°
Range: 60 to 90° in steps of 1
MESSAGE
PHS DIST Z1
SUPV: 0.200 pu
Range: 0.050 to 30.000 pu in steps of 0.001
MESSAGE
PHS DIST Z1 VOLT
LEVEL: 0.000 pu
Range: 0.000 to 5.000 pu in steps of 0.001
MESSAGE
PHS DIST Z1
DELAY: 0.000 s
Range: 0.000 to 65.535 s in steps of 0.001
MESSAGE
PHS DIST Z1 BLK:
Off
Range: FlexLogic™ operand
MESSAGE
PHS DIST Z1
TARGET: Self-reset
Range: Self-reset, Latched, Disabled
MESSAGE
PHS DIST Z1
EVENTS: Disabled
Range: Disabled, Enabled
WARNING