GE L60 Instruction Manual page 182

5.5 GROUPED ELEMENTS
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
GROUPED ELEMENTS
2. The
MEMORY DURATION
GROUPED ELEMENTS
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 [
Logic™ operands) or time-delayed elements (operate [
instantaneous under-reaching tripping mode. Additional details may be found in Chapter 8: Theory of Operation.
Ensure that the
VOLTAGE BANK
WARNING
• PHS DIST Z1 DIR: All three zones are reversible. The forward direction is defined by the
whereas the reverse direction is shifted 180° from that angle. The non-directional zone spans between the forward
reach impedance defined by the
defined by
PHS DIST Z1 REV REACH
• 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.
5-90
PHS DIST Z1
MESSAGE
DIR COMP LIMIT: 90°
PHS DIST Z1 QUAD
MESSAGE
RGT BLD: 10.00 ohms
PHS DIST Z1 QUAD
MESSAGE
RGT BLD RCA: 85°
PHS DIST Z1 QUAD
MESSAGE
LFT BLD: 10.00 ohms
PHS DIST Z1 QUAD
MESSAGE
LFT BLD RCA: 85°
PHS DIST Z1
MESSAGE
SUPV: 0.200 pu
PHS DIST Z1 VOLT
MESSAGE
LEVEL: 0.000 pu
PHS DIST Z1
MESSAGE
DELAY: 0.000 s
PHS DIST Z1 BLK:
MESSAGE
Off
PHS DIST Z1
MESSAGE
TARGET: Self-reset
PHS DIST Z1
MESSAGE
EVENTS: Disabled
setting (common for the phase distance elements of all zones as entered under
SETTING GROUP 1(6)
setting (common for the phase distance elements of all zones as entered under
SETTING GROUP 1(6)
PHASE VT SECONDARY VOLTAGE
menu) is set correctly to prevent improper operation of associated memory action.
PHS DIST Z1 REACH
and
PHS DIST Z1 REV REACH RCA
L60 Line Phase Comparison Relay
Range: 30 to 90° in steps of 1
Range: 0.02 to 500.00 ohms in steps of 0.01
Range: 60 to 90° in steps of 1
Range: 0.02 to 500.00 ohms in steps of 0.01
Range: 60 to 90° in steps of 1
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
).
DISTANCE
).
DISTANCE
] FlexLogic™ operands), only Zone 1 is intended for the
OP
setting (see the
SETTINGS
and settings, and the reverse reach impedance
PHS DIST Z1 RCA
as illustrated below.
5 SETTINGS
SETTINGS
SETTINGS
] and dropout [ ] Flex-
PKP DPO
SYSTEM SETUP AC INPUTS
setting,
PHS DIST Z1 RCA
GE Multilin