ABB RER620, Руководство по эксплуатации продукта

Страница: 24 / 44

24
R E R6 20
A DVA N C ED R EC LOSER P R OT EC T I O N & CO N T R O L
—
Table 26. 67/51N and 67/50N technical data
—
Table 27. 46 technical data
Description Value
Operation accuracy
67/51N, 67/50N-1
Depending on the frequency of the current measured: f
n
±2Hz
Current:
±1.5% of the set value or ±0.002 x I
n
Voltage:
±1.5% of the set value or ±0.002 x V
n
Phase angle:
±2°
67N/50N-2
Current:
±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 set value (at currents in the range of 10…40 x I
n
)
Voltage:
±1.5% of the set value or ±0.002 x U
n
Phase angle:
±2°
Pickup time
1) 2)
Minimum Typical Maximum
67N/51N, 67N/50N-1
and 67N/50N-2:
I
Fault
= 2 x set Pickup range 61 ms 64 ms 66 ms
Reset time < 40 ms
Reset ratio Typical 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: -50dB at f =
DFT: -50dB at f = n x f
n
,
where n = 2, 3, 4, 5,…-
Characteristic Value
Operation accuracy
Depending on the frequency of the current measured: f
n
±2Hz
±1.5% of the set value or ±0.002 x I
n
Pickup time
1) 2)
I
Fault
= 2 x set Pickup value
I
Fault
= 10 x set Pickup value
Minimum Typical Maximum
22 ms
14 ms 24 ms
16 ms 25 ms
17 ms
Reset time < 40 ms
Reset ratio Typical 0.96
Retardation time < 35 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 DFT: -50dB at f = n x f
n
, where n = 2, 3, 4, 5,…-
1)
Measurement mode = default (depends on stage), current before fault = 0.0 x I
n
, f
n
= 50 Hz, earth-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 range = 2.5 x I
n
, Pickup range multiples in range of 1.5 to 20
1) Negative sequence voltage before fault 0.0 x U
n
, f
n
= 50 Hz, negative sequence overvoltage 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 x I
n
, Pickup value multiples in range of 1.5 to 20