ABB REF615 ANSI 5.0 FP1, Product Manual

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41
Protection functions
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Table 30. Three-phase non-directional overcurrent protection (PHxPTOC)
Characteristic Value
Operation accuracy
PHLPTOC
Depending on the frequency of the measured current: fn ±2 Hz
±1.5% of the set value or ±0.002 x I
n
PHHPTOC
and
PHIPTOC
±1.5% of set value or ±0.002 x I
n
(at currents in the range of 0.1…10 x I
n
)
±5.0% of the set value
(at currents in the range of 10…40 x I
n
)
Start time
1) 2)
Minimum Typical Maximum
PHIPTOC:
I
Fault
= 2 x set Start value
I
Fault
= 10 x set Start value
16 ms
11 ms 19 ms
12 ms 23 ms
14 ms
PHHPTOC and PHLPTOC:
I
Fault
= 2 x 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 3)
Suppression of harmonics
RMS: No suppression
DFT: -50dB at f =
n x f
n
, where n = 2, 3, 4, 5,…
Peak-to-Peak: No suppression
P-to-P+backup: No suppression
1) Set Operate delay time = 0,02 s, Operate curve type = IEC definite time, Measurement mode = default (dpends on stage), current before fault = 0.0 × I
n
, f
n
= 50 Hz, fault current in
one phase
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
1) For further reference, see the Operation characteristics table
—
Table 31. 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 0.10...40.00 × I
n
0.01
PHIPTOC 1.00...40.00 × I
n
0.01
Time multiplier PHIPTOC 0.05...15.00 0.01
Operate delay time
PHLPTOC and PHHPTOC
40...200000 ms 10
PHIPTOC 20...200000 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
PHHPTOC
Definite or inverse time
Curve type: 1, 3, 5, 9, 10, 12, 15, 17
PHIPTOC Definite time