ABB REU615, Product Manual, Page: 27 / 60

Protection functions
Table 28. Three-phase non-directional overcurrent protection (PHxPTOC)
Characteristic Value
Operation accuracy Depending on the frequency of the current measured: f
n
±2 Hz
PHLPTOC
±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
22 ms
24 ms
25 ms
Reset time < 40 ms
Reset ratio Typical 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: -50 dB 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 (depends on stage), current before fault = 0.0
x 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) Includes the delay of the signal output contact
3) Includes the delay of the heavy-duty output contact
Voltage Protection and Control 1MRS757058 D
REU615
Product version: 4.0
ABB 27