50 REF615 ANSI 5.0 FP1 FEEDER PROTECTION AND CONTROL
—
Table 59. Negative-sequence overvoltage protection (NSPTOV)
Characteristic Value
Operation accuracy
Depending on the frequency of the measured current: f
n
n
Start time
Minimum Typical Maximum
U
Fault
U
Fault
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Suppression of harmonics
n
n
, f
n
= 50 Hz, negative-sequence overvoltage with nominal frequency injected from random phase angle, results based on statistical
distribution of 1000 measurements
2) Includes the delay of the signal output contact
—
Table 60. Negative-sequence overvoltage protection (NSPTOV) main settings
Parameter Function Value (range) Step
Start value
NSPTOV
n
Operate delay time
NSPTOV
—
Table 61. Frequency protection (FRPFRQ)
Characteristic Value
Operation accuracy
Start time
Reset time
Operate time accuracy
—
Table 58. Positive-sequence undervoltage protection (PSPTUV) main settings
Parameter Function Value (range) Step
Start value
PSPTUV
n
Operate delay time
PSPTUV
Voltage block value
PSPTUV
n
0.01
—
Table 57. Positive-sequence undervoltage protection (PSPTUV)
Characteristic Value
Operation accuracy
Depending on the frequency of the measured current: f
n
n
Start time
Minimum Typical Maximum
U
Fault
U
Fault
Reset time
Reset ratio Depends on the set Relative hysteresis
Retardation time
Operate time accuracy in definite time mode
Suppression of harmonics
n
n
n
, f
n
= 50 Hz, positive sequence undervoltage with nominal frequency injected from random phase angle, results
based on statistical distribution of 1000 measurements
2) Includes the delay of the signal output contact
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