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4.4.5.9
Technical data
Table 474: PSPTUV Technical data
Characteristic
Value
Operation accuracy
Depending on the frequency of the measured voltage: f
n
±2 Hz
±1.5% of the set value or ±0.002 × U
n
Start time
1
2
U
Fault
= 0.99 × set
Start
value
U
Fault
= 0.9 × set
Start
value
Minimum
Typical
Maximum
52 ms
44 ms
55 ms
47 ms
58 ms
50 ms
Reset time
Typically 40 ms
Reset ratio
Depends on the set
Relative hysteresis
Retardation time
<35 ms
Operate time accuracy in definite time mode
±1.0% of the set value or ±20 ms
Suppression of harmonics
DFT: -50 dB at f = n × f
n
, where n = 2, 3, 4, 5,…
4.4.5.10
Technical revision history
Table 475: PSPTUV Technical revision history
Technical revision
Change
B
-
C
Internal improvement
D
Internal improvement
4.5
Frequency protection
4.5.1
Frequency protection FRPFRQ
4.5.1.1
Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Frequency protection
FRPFRQ
f>/f<,df/dt
81
1
Start value = 1.0 × U
n
, positive-sequence voltage before fault = 1.1 × U
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
Protection functions
1MRS758755 C
448
REC615 & RER615
Technical Manual