ABB RELION REF615R, Technical Manual

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4.1.5.13 Technical data
Table 152: 67/51N and 67/50N Technical data
Characteristic Value
Operation accuracy Depending on the frequency of the measured
current: f
n
±2 Hz
67/51N
Current:
±1.5% of the set value or ±0.002 × I
n
Voltage
±1.5% of the set value or ±0.002 × V
n
Phase angle:
±2°
67/50N-1 and 67/50N-2 Current:
±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
)
Voltage:
±1.5% of the set value or ±0.002 × V
n
Phase angle:
±2°
Pickup time
1)2)
Minimum Typical Maximum
67/50N-2 and 67/51N
and 67/50N-1:
I
Fault
= 2 × set Pickup
value
62 ms 65 ms 69 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
Section 4
1MRS240050-IB C
Protection functions
204 REF615R
Technical Manual