Phase Directional Unit (67P); 67P Unit Setpoints - GE Multilin F650 Instruction Manual

5 SETPOINTS

5.4.3.3 PHASE DIRECTIONAL UNIT (67P)

The phase directional unit (67P) provides independent elements for each phase, and determines the direction of the
current both in permanence and in fault condition.
Its main function is to apply a blocking signal to overcurrent units for preventing their operation when the current is flowing
in certain direction. In order to determine the direction of current, the unit uses phase current values as operation
magnitude, and phase-to-phase voltage values as polarization magnitude. This means that in order to polarize a phase, we
use the phase-to-phase voltage of the other two phases, known as crossed polarization.
The following table describes the phase directional unit setpoints.
Table 5–40: 67P UNIT SETPOINTS
SETPOINT > PROTECTION ELEMENTS > PHASE CURRENT > PHASE DIRECTIONAL >
PHASE DIRECTIONAL 1> PHASE DIRECTIONAL 2 > PHASE DIRECTIONAL 3
SETPOINT DESCRIPTION
Function permission
Maximum Torque Angle
Operation Direction
Block logic
Polarization voltage threshold
Snapshot event generation
Function:
MTA:
Direction:
Block Logic:
Polarization Voltage Threshold:
Snapshot Events:
Phase directional element is an independent Protection unit that provides block and Operation signals for each phase.
These signals can be monitored both through the relay HMI or using EnerVista 650 Setup at "Actual > Status > Protection
> Phase Current"
GE Multilin
NAME DEFAULT VALUE STEP
Function DISABLED
MTA 45º
Direction FORWARD
Block Logic PERMISSION
Pol V Threshold 40
Snapshot Events ENABLED
This setpoint allows enabling or disabling the corresponding directional unit.
The MTA setpoint corresponds to the Torque angle, which is the rotation applied to
phase-to-phase crossed voltage.
This setpoint allows selecting the area for the directional unit to operate, either forward
or reverse.
This setpoint allows selecting either permission or block, depending on the logic to be
applied in the event of directional element block.
this is the minimum voltage considered for the direction calculation. Under this
setpoint, the unit will be blocked.
The snapshot event setpoint enables or disables the snapshot event generation for the
phase directional units.
F650 Digital Bay Controller
5.4 PROTECTION ELEMENTS
RANGE
N/A [DISABLED – ENABLED]
1 Deg [-90 : +90]
N/A [FORWARD – REVERSE]
N/A [BLOCK – PERMISSION]
1 V [0 : 300]
N/A [DISABLED – ENABLED]
5
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