ABB 615 Series - Technical Data

4.2.2.13 Technical data
Table 367: 67/51N, 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
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
I
Fault
= 2 × set Pickup
value
42 ms
46 ms 49 ms
67/51N
I
Fault
= 2 × set Pickup
value
58 ms
62 ms 66 ms
Reset time Typically 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
= 50 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
1MAC059074-MB A Section 4
Protection functions
615 series ANSI 359
Technical Manual