ABB RELION REX640, Руководство по эксплуатации продукта

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Table 52. Three-phase non-directional overcurrent protection (PHxPTOC)
Characteristic Value
Operation accuracy Depending on the frequency of the measured current: f
n
±2 Hz
PHLPTOC
±1.5% of the set value or ±0.002 × I
n
PHHPTOC
and
PHIPTOC ±1.5% of the set value or ±0.002 × I
n
(at currents in the range of 0.1…10 × I
n
)
±5.0% of the set value
(at currents in the range of 10…40 × I
n
)
Start time 1)
Minimum Typical Maximum
PHIPTOC 2) :
I
Fault
= 2 × set
Start value
I
Fault
= 10 × set
Start value
8 ms
7 ms
12 ms
9 ms
15 ms
12 ms
PHHPTOC and PHLPTOC
3)
:
I
Fault
= 2 × set
Start value
23 ms
26 ms
29 ms
Reset time Typically <40 ms
Reset ratio Typically 0.96
Retardation time <30 ms
Operate time accuracy in definite time mode ±1.0% of the set value or ±20 ms
Operate time accuracy in inverse time mode ±5.0% of the theoretical value or ±20 ms
Suppression of harmonics RMS: No suppression
DFT: -50 dB at f = n × f
n
, where n = 2, 3, 4, 5,…
Peak-to-Peak: No suppression
P-to-P+backup: No suppression
1) Set
Operate curve type = IEC definite time, Measurement mode = default (depends on stage), current before fault = 0.0 × In, fn = 50 Hz, fault current in one phase with nominal frequency
injected from random phase angle, results based on statistical distribution of 1000 measurements
2) Measured with static signal output (SSO)
3) Includes the delay of the signal output contact (SO)
Table 53. Three-phase non-directional overcurrent protection (PHxPTOC) main settings
Parameter Function Value (Range) Step
Start value PHLPTOC 0.05...5.00 × I
n
0.01
PHHPTOC and PHIPTOC 0.10...40.00 × I
n
0.01
Time multiplier PHLPTOC and PHHPTOC 0.025...15.000 0.005
Operate delay time PHLPTOC and PHHPTOC 40...300000 ms 10
PHIPTOC 20...300000 ms 10
Operating curve type
1) PHLPTOC Definite or inverse time
Curve type: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19, 20
PHHPTOC Definite or inverse time
Curve type: 1, 3, 5, 9, 10, 12, 15, 17
PHIPTOC Definite time
1) For further reference, see the Operation characteristics table
1MRS759144 A
REX640
Product version: 1
44 ABB