Section 4
1MAC309294-MB F
Protection functions
170
RER620
Technical Manual
4.1.4.13
Technical data
Table 182: 67/51N and 67/50N Technical data
4.1.5
Sensitive earth-fault protection 50SEF
4.1.5.1
Identification
Characteristic
Value
Operation accuracy
Depending on the frequency of the current
measured: f
n
±2Hz
67/51N and 67/50N-1
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°
67/50N-2
Current:
±1.5% of the 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
)
Voltage:
±1.5% of the set value or ±0.002 x V
n
Phase angle:
±2°
Pickup time
1 ,2
1.
Measurement mode
= default (depends on stage), current before fault = 0.0 x 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
Minimum
Typical
Maximum
67/50N-2 and 67/51N
and 67/50N-1:
I
Fault
= 2 x set
Pickup
value
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
3. Maximum
Pickup value
= 2.5 x I
n
,
Pickup value
multiples in range of 1.5 to 20
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
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Non-directional sensitive earth-fault
protection
XEFLPTOC
I
0
>
50SEF
Содержание RER620
Страница 1: ...Relion Protection and Control Advanced Recloser Protection and Control RER620 Technical Manual ...
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Страница 22: ...Section 1MAC309294 MB F 16 RER620 Technical Manual ...
Страница 88: ...Section 3 1MAC309294 MB F Basic functions 82 RER620 Technical Manual ...
Страница 278: ...Section 4 1MAC309294 MB F Protection functions 272 RER620 Technical Manual ...
Страница 362: ...Section 5 1MAC309294 MB F Control functions 356 RER620 Technical Manual ...
Страница 418: ...Section 7 1MAC309294 MB F Measurement functions 412 RER620 Technical Manual ...
Страница 428: ...Section 8 1MAC309294 MB F Recording functions 422 RER620 Technical Manual ...
Страница 464: ...Section 9 1MAC309294 MB F Other functions 458 RER620 Technical Manual ...
Страница 554: ...Section 10 1MAC309294 MB F General function block features 548 RER620 Technical Manual ...
Страница 568: ...Section 12 1MAC309294 MB F Relay physical connections 562 RER620 Technical Manual ...
Страница 574: ...Section 13 1MAC309294 MB F Technical data 568 RER620 Technical Manual ...
Страница 576: ...Section 14 1MAC309294 MB F Relay and functionality tests 570 RER620 Technical Manual ...
Страница 578: ...Section 15 1MAC309294 MB F Applicable standards and regulations 572 RER620 Technical Manual ...
Страница 582: ...Section 16 1MAC309294 MB F Glossary 576 RER620 Technical Manual ...
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