ABB RELION 630 Series Product Manual page 26

Generator Protection and Control
REG630
Product version: 1.3
Protection functions
Table 30. Three-phase non-directional overcurrent protection (PHxPTOC)
Characteristic
Operation accuracy
1)2)
Start time
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Operate time accuracy in inverse time mode
Suppression of harmonics
1) Set Operate delay time = 0.02 s, Operate curve type = IEC definite time, Measurement mode = default (depends on stage), current before fault = 0.0 × I
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
3) Includes the delay of the heavy-duty output contact
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PHLPTOC
PHHPTOC
and
PHIPTOC
PHIPTOC:
Start value
I = 2 × set
Fault
Start value
I = 10 × set
Fault
PHHPTOC:
Start value
I = 2 × set
Fault
PHLPTOC:
Start value
I = 2 × set
Fault
Value
At the frequency f = f
n
±1.5% of the set value or ±0.002 × I
±1.5% of set value or ±0.002 × I
(at currents in the range of 0.1...10 × I
±5.0% of the set value
(at currents in the range of 10...40 × I
Typically 17 ms (±5 ms)
Typically 10 ms (±5 ms)
Typically 19 ms (±5 ms)
Typically 23 ms (±15 ms)
<45 ms
Typically 0.96
<30 ms
±1.0% of the set value or ±20 ms
±5.0% of the theoretical value or ±20 ms
RMS: No suppression
DFT: -50 dB at f = n × f , where n = 2, 3, 4, 5,...
n
Peak-to-Peak: No suppression
P-to-P+backup: No suppression
1MRS757583 C
n
n
)
n
)
n
3)
, f = 50 Hz, fault current in one phase
n n
ABB