GE F650 Instruction Manual page 220

5 SETTINGS
Table 5–65: 59P ELEMENT SETTINGS
SETPOINT > PROTECTION ELEMENTS > VOLTAGE ELEMENTS > PHASE OV >
PHASE OV 1> PHASE OV 2 > PHASE OV 3
SETTING DESCRIPTION
Function permission
Pickup Level
Trip time
Reset time
Operation logic
Snapshot Event generation
Phase overvoltage element settings are:
Function Permission (Function): This setting indicates whether the phase overvoltage element is enabled or disabled.
Pickup Level:
Trip time (Trip Delay):
Reset time (Reset Delay):
Operation logic (Logic):
Snapshot Events:
5.4.8.3 NEUTRAL OVERVOLTAGE ELEMENT (HIGH LEVEL AND LOW LEVEL) (59NH/59NL)
The Neutral Overvoltage element can be used to detect an asymmetrical system voltage condition due to a ground fault or
to the loss of one or two phases of the source.
The element responds to the system neutral voltage (3V0), calculated from the phase voltages or measured by the 4th
voltage transformer.
VT errors and normal voltage unbalance must be considered when setting this element.
The element time delay is selectable between 0 and 900 seconds and incorporates a reset with a selectable delay between
0 and 900 seconds.
Notice that the neutral overvoltage element will not be available if a DELTA Connection is set in the Phase VT Connection
setting in General settings, and the fourth voltage transformer input is set to the busbar voltage for the synchronism
element (Vx in Auxiliary Voltage setting). This is because with this combination of settings it is not possible to calculate the
zero sequence component from the phase-to-phase voltage magnitudes.
GEK-106310AB
NAME DEFAULT
VALUE
Function DISABLED
Pickup Level 10
Trip Delay 10.00
Reset Delay 0.00
Logic ANY PHASE
Snapshot Events ENABLED
This is the voltage threshold over which the overvoltage element will operate.
setting of the Protection element operation time.
Reset time of the Protection element.
This setting allows the element operation logic selection:
ANY PHASE The element will operate under an overvoltage condition in any of the
three phases.
TWO PHASES The element will operate under an overvoltage condition in at least
two phases.
ALL PHASES The element will operate under an overvoltage condition in the three
phases.
The snapshot event setting enables or disables the snapshot event generation for this
element.
F650 Digital Bay Controller
5.4 PROTECTION ELEMENTS
STEP RANGE
N/A [DISABLED – ENABLED]
1 V [3 : 300]
0.01 s [0.00 : 900.00]
0.01 s [0.00 : 900.00]
N/A [ANY PHASE – TWO PHASES – ALL PHASES]
N/A [DISABLED – ENABLED]
5
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