4.4.3.9
Technical data
Table 255:
PREVPTOC Technical data
Characteristic
Value
Operation accuracy
Depending on the frequency of the measured
current: f
n
±2 Hz
±1.5% of the set value or ±0.002 × I
n
Start time
1)2)
Minimum
Typical
Maximum
I
Fault
= 2.0 × set
Start
value
23 ms
25 ms
28 ms
Reset time
Typically 40 ms
Reset ratio
Typically 0.96
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,…
1) Negative-sequence current before = 0.0, f
n
= 50 Hz, results based on statistical distribution of 1000
measurements
2) Includes the delay of the signal output contact
4.4.3.10
Technical revision history
Table 256:
PREVPTOC Technical revision history
Technical revision
Change
B
Internal improvement
4.4.4
Negative-sequence overcurrent protection for machines
MNSPTOC
4.4.4.1
Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Negative-sequence overcurrent
protection for machines
MNSPTOC
I2>M
46M
4.4.4.2
Function block
GUID-5B6B4705-1EF3-4E12-B1A6-92A5D9D71218 V2 EN
Figure 116:
Function block
Section 4
1MRS757454 D
Protection functions
242
611 series
Technical Manual
Summary of Contents for Relion 611 Series
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