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6. Menu
SETPOINTS
VFR Voltage Frequency Relay
6.3
Instruction Manual: VFR GBM 06/10/2021
6.4 Setpoints: VOLTAGE PROTECTION
The voltage thresholds in the following setpoints, are expressed in percentage of Rated VT.
Delta >> Rated VT = phase-phase Primary Rating.
Wye >> Rated VT = phase-ground Primary Rating.
Voltage Protect.
UnderVoltage1
Relay
Value
- - - - - - - -
RANGE: NONE; ANY COMBINATION OF AUX1, AUX2, AUX3, AUX4, AUX5,
AUX6, AUX7 OR AUX8
When NONE is selected, the protection UnderVoltage1 will be disabled.
Voltage Protect.
UnderVoltage1 Level
Value
80 %VT
RANGE: 30
99
STEPS: 1
Enter the UnderVoltage1 intervention level.
The protection will activate when the voltages drop down this level for a period
>= UnderVoltage1 Delay value.
[6.4
Setpoints: VOLTAGE PROTECT.
]
If UnderVoltage1 Relay
≠
NONE
Voltage Protect.
UnderVoltage1 Reset
Value
85 %VT
RANGE: 31
100
STEPS: 1
Enter the percentage value at which the faulty condition for UnderVoltage1
drops out. At this point, it is possible to reset the VFR manually by pressing the
Reset button.
[6.4 Setpoints: VOLTAGE PROTECT.
]
If UnderVoltage1 Relay
≠
NONE
Voltage Protect.
UnderVoltage1 Delay
Value
0.50 s
RANGE: 0.10
600
STEPS: 0.01, 0.1; 1
Enter the UnderVoltage1 protection intervention delay.
[6.4 Setpoints: VOLTAGE PROTECT.
]
If UnderVoltage1 Relay
≠
NONE
Voltage Protect.
UnderVoltage1 Phase
Operat.
Value
ANY ONE
RANGE: ANY ONE; ANY TWO; ALL THREE
Select the minimum number of phases on which the faulty condition has to occur
for UnderVoltage1 intervention.
[
6.4 Setpoints: VOLTAGE PROTECT.
]
If UnderVoltage1 Relay
≠
NONE
Voltage Protect.
UnderVoltage1 min. op.
level
Value
15 %VT
RANGE: 0
50
STEPS: 1
Enter the limit voltage value under which the UnderVoltage1 protection is
disabled.
[6.4 Setpoints: VOLTAGE PROTECT.
]
If UnderVoltage1 Relay
≠
NONE
Voltage Protect.
OverVoltage1
Relay
Value
- - - - - - - -
RANGE: NONE; ANY COMBINATION OF AUX1, AUX2, AUX3, AUX4, AUX5,
AUX6, AUX7 OR AUX8
When NONE is selected, the protection OverVoltage1 will be disabled.
Voltage Protect.
OverVoltage1 Level
Value
115 %VT
RANGE: 101
150
STEPS: 1
Enter the OverVoltage1 intervention level.
The protection will activate when the voltages exceed this level for a period >=
OverVoltage1 Delay value.
[6.4
Setpoints: VOLTAGE PROTECT.
]
If OverVoltage1 Relay
≠
NONE