ABB REF615 ANSI 5.0 FP1 Product Manual page 50

50 R E F 6 1 5 A N S I 5 . 0 F P 1 F E E D E R P R OT E C T I O N A N D C O N T R O L
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Table 57. Positive-sequence undervoltage protection (PSPTUV)
Characteristic
Operation accuracy
Start time
1) 2)
U = 0.99 x set Start value
Fault
U = 0.9 x set Start value
Fault
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Suppression of harmonics
1) Start value = 1.0 × U , positive-sequence voltage before fault = 1.1 × U
n
based on statistical distribution of 1000 measurements
2) Includes the delay of the signal output contact
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Table 58. Positive-sequence undervoltage protection (PSPTUV) main settings
Parameter
Start value
Operate delay time
Voltage block value
—
Table 59. Negative-sequence overvoltage protection (NSPTOV)
Characteristic
Operation accuracy
Start time
1) 2)
U = 1.1 x set Start value
Fault
U = 2.0 x set Start value
Fault
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Suppression of harmonics
1) Negative-sequence voltage before fault = 0.0 × U
distribution of 1000 measurements
2) Includes the delay of the signal output contact
—
Table 60. Negative-sequence overvoltage protection (NSPTOV) main settings
Parameter
Start value
Operate delay time
—
Table 61. Frequency protection (FRPFRQ)
Characteristic
f>/f<
Operation accuracy
df/dt
f>/f<
Start time 1) 2)
df/dt
Reset time
Operate time accuracy
Value
Depending on the frequency of the measured current: f
±1.5% of the set value or ±0.002 x I
Minimum
52 ms
44 ms
Typically 40 ms
Depends on the set Relative hysteresis
< 35 ms
±1.0% of the set value or ±20 ms
DFT: -50dB at f = n x f
, f = 50 Hz, positive sequence undervoltage with nominal frequency injected from random phase angle, results
n n
Function
PSPTUV
PSPTUV
PSPTUV
Value
Depending on the frequency of the measured current: f
±1.5% of the set value or ±0.002 × U
Minimum
33 ms
24 ms
Typically 40 ms
Typically 0.96
< 35 ms
±1.0% of the set value or ±20 ms
DFT: -50dB at f = n x f
, f = 50 Hz, negative-sequence overvoltage with nominal frequency injected from random phase angle, results based on statistical
n n
Function
NSPTOV
NSPTOV
Value
±5 mHz
±50 mHz/s (in range |df/dt| <5 Hz/s)
±2.0% of the set value (in range 5 Hz/s < |df/dt| < 15 Hz/s)
<80 ms
<120 ms
<150 ms
±1.0% of the set value or ±30 ms
n
Typical
55 ms
47 ms
, where n = 2, 3, 4, 5,...
n
Value (range)
0.010...1.200 × U
n
40...120000 ms
0.01...1.00 × U
n
n
Typical
35 ms
26 ms
, where n = 2, 3, 4, 5,...
n
Value (range)
0.010...1.000 × U
n
40...120000 ms
±2 Hz
n
Maximum
58 ms
50 ms
Step
0.001
10
0.01
n
Maximum
37 ms
28 ms
Step
0.001
1