ABB RER620 Product Manual page 24

24 R E R 6 2 0 A D VA N C E D R E C LO S E R P R OT E C T I O N & C O N T R O L
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Table 26. 67/51N and 67/50N technical data
Description
67/51N, 67/50N-1
Operation accuracy
67N/50N-2
67N/51N, 67N/50N-1
Pickup time
1) 2)
and 67N/50N-2:
I = 2 x set Pickup range
Fault
Reset time
Reset ratio
Retardation time
Trip time accuracy in definite time mode
Trip time accuracy in inverse time mode
Suppression of harmonics
Measurement mode = default (depends on stage), current before fault = 0.0 x I
1)
based on statistical distribution of 1000 measurements
Includes the delay of the signal output contact
2)
Maximum Pickup range = 2.5 x I , Pickup range multiples in range of 1.5 to 20
3)
n
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Table 27. 46 technical data
Characteristic
Operation accuracy
I = 2 x set Pickup value
Fault
Pickup time I = 10 x set Pickup value
1) 2)
Fault
Reset time
Reset ratio
Retardation time
Trip time accuracy in definite time mode
Trip time accuracy in inverse time mode
Suppression of harmonics
1) Negative sequence voltage before fault 0.0 x U
distribution of 1000 measurements
Includes the delay of the signal output contact
2)
Maximum Pickup value = 2.5 x I , Pickup value multiples in range of 1.5 to 20
3)
n
Value
Depending on the frequency of the current measured: f
Current:
±1.5% of the set value or ±0.002 x I
Voltage:
±1.5% of the set value or ±0.002 x V
Phase angle:
±2°
Current:
±1.5% of set value or ±0.002 x I
±5.0% of set value (at currents in the range of 10...40 x I
Voltage:
±1.5% of the set value or ±0.002 x U
Phase angle:
±2°
Minimum
61 ms
< 40 ms
Typical 0.96
< 30 ms
±1.0% of the set value or ±20 ms
±5.0% of the theoretical value or ±20 ms
RMS: No suppression DFT: -50dB at f =
DFT: -50dB at f = n x f
n
where n = 2, 3, 4, 5,...-
, f = 50 Hz, earth-fault current with nominal frequency injected from random phase angle, results
n n
Value
Depending on the frequency of the current measured: f
±1.5% of the set value or ±0.002 x I
Minimum
22 ms
14 ms
< 40 ms
Typical 0.96
< 35 ms
±1.0% of the set value or ±20 ms
±5.0% of the theoretical value or ±20 ms
DFT: -50dB at f = n x f
n
, f = 50 Hz, negative sequence overvoltage with nominal frequency injected from random phase angle, results based on statistical
n n
n
n
(at currents in the range of 0.1...10 x I
n
n
Typical
64 ms
3)
,
n
Typical
24 ms
16 ms
3)
, where n = 2, 3, 4, 5,...-
±2Hz
n
)
n
)
n
Maximum
66 ms
±2Hz
n
Maximum
25 ms
17 ms