GE F650 Instruction Manual page 197

5.4 PROTECTION ELEMENTS
5.4.3.3 PHASE DIRECTIONAL ELEMENT (67P)
The Phase directional element (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 the overcurrent elements to prevent their operation when the current is
flowing in a certain direction. In order to determine the direction of the current, the element 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 element settings.
Table 5–42: PHASE DIRECTIONAL ELEMENT SETTINGS
SETPOINT > PROTECTION ELEMENTS > PHASE CURRENT > PHASE DIRECTIONAL >
PHASE DIRECTIONAL 1> PHASE DIRECTIONAL 2 > PHASE DIRECTIONAL 3
SETTING DESCRIPTION
Function permission
Maximum Torque Angle
Operation Direction
Block logic
Polarization voltage threshold
Snapshot event generation
Function:
5
MTA:
Direction:
Block Logic:
Polarization Voltage Threshold: This is the minimum voltage considered for the direction calculation. Under this setting,
Snapshot Events:
Phase directional element is an independent Protection element 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"
5-50
NAME DEFAULT VALUE STEP
Function DISABLED
MTA 45º
Direction FORWARD
Block Logic PERMISSION
Pol V Threshold 40
Snapshot Events ENABLED
This setting allows enabling or disabling the corresponding directional element.
The MTA setting corresponds to the Torque angle, which is the rotation applied to
phase-to-phase crossed voltage.
This setting allows selecting the area for the directional element to operate, either
forward or reverse.
This setting allows selecting either permission or block, depending on the logic to be
applied in the event of directional element block.
the element will be blocked.
The snapshot event setting enables or disables the snapshot event generation for the
phase directional elements.
F650 Digital Bay Controller
5 SETTINGS
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]
GEK-106310AB