ABB RER620, Руководство по эксплуатации продукта

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Table 24. 67/51P and 67/50P technical data
Description Value
Operation accuracy
67/51P, 67/50P-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 U
n
Phase angle:
±2°
67/50P-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
I
Fault
= 2.0 x set Pickup value 37 ms 40 ms 42 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 and Pol quantity = default, current before fault = 0.0 x I
n
, voltage before fault 1.0 x U
n
, f
n
= 50 Hz, fault current in one phase 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
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Table 25. 51N/G, 50N/G-1/2 & 50N/G-3 technical data
Description Value
Depending on the frequency of the current measured: f
n
±2Hz
Operation accuracy
51N/51G ±1.5% of the set value or ±0.002 x I
n
50N-1/2, 50G-1/2
and
50N/G3
±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 the set value
(at currents in the range of 10…40 x I
n
)
Pickup time
1) 2)
Minimum Typical Maximum
50N-3, 50G-3:
I
Fault
= 2 x set Pickup value
I
Fault
= 10 x set Pickup value
16 ms
11 ms 19 ms
12 ms 23 ms
14 ms
50N-1, 50N-2, 50G-1, 50G-2
and 51N/51G:
I
Fault
= 2 x set Pickup range 22 ms 24 ms 25 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 =
n x 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 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