ABB RELION REF615R, Техническое руководство

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4.1.4.11 Technical data
Table 131: 51N/G, 50N/G-1/2 & 50N/G-3 Technical data
Characteristic Value
Operation
accuracy
51N/G ±1.5% of the set value or ±0.002 × I
n
50N-1/2 & 50G-1/2
and
50N/G-3
±1.5% of 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
)
Pickup time
1)2)
Minimum Typical Maximum
50N/G-3:
I
Fault
= 2 × set Pickup value
I
Fault
= 10 × set Pickup value
15 ms
12 ms
16 ms
13 ms
17 ms
14 ms
50N-1/2 & 50G-1/2 and
51N/G:
I
Fault
= 2 × set Pickup value
23 ms 25 ms 28 ms
Reset time <40 ms
Reset ratio Typically 0.96
Retardation time <30 ms
Trip time accuracy in definite time mode ±1.0% of the set value or ±20 ms
Trip 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 × f
n
, where n = 2, 3, 4, 5,…
Peak-to-Peak: No suppression
1) Measurement mode = default (depends on stage), current before fault = 0.0 × I
n
, f
n
= 60 Hz, ground-fault
current 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) Maximum
Pickup value = 2.5 × I
n
,
Pickup value multiples in range of 1.5...20
4.1.5 Directional earth-fault protection 67/51N and 67/50N
4.1.5.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Directional earth-fault protection, low
stage
DEFLPDEF1 I0> ->(1) 67/51N
Directional earth-fault protection, high
stage
DEFHPDEF1
DEFHPDEF2
I0>> ->(1)
I0>> ->(2)
67/50N-1
67/50N-2
1MRS240050-IB C
Section 4
Protection functions
REF615R 171
Technical Manual