3U0 > 3U0>
AND
t
tUN
startUPP
t
tIN
t
tOffUN
OR
OR
(Non delayed IN start)
IEC16000018-1-en.vsdx
3I0>IN>
startIN
IEC16000018 V1 EN-US
Figure 71:
Residual current criteria
6.5.6.2
Phase selection
GUID-A3B9F4A9-30D1-40E5-B0A8-6BB66093C27A v1
During a cross-country fault, the phase with an external fault typically does not
carry any fault current, which will make it difficult for a conventional phase
selection function to detect the fault. Therefore, PPL2PHIZ function provides an
additional phase selection based on voltage.
PPL2PHIZ is designed to detect two-phase faults based on under-voltage in two
phases or between two phases.
OR
startU
ULxLy <
UPP<
L3L1
L2L3
L1L2
ULx <
UPN<
L3
L2
L1
3U0 >
3U0>
AND
AND
AND
OR
OR
OR
AND
startUL1
startUL2
startUL3
OR
OR
OR
start UL1L2
start UL2L3
start UL3L1
IEC16000019-1-en.vsdx
IEC16000019 V1 EN-US
Figure 72:
Phase selection
The voltage phase selection can be complemented with external phase selection
through inputs RELL1-3N.
Voltage phase selection is disabled in
No Filter
and
NoPref
operating modes.
Section 6
1MRK 506 382-UEN A
Impedance protection
152
Line distance protection REL650 2.2 IEC
Technical manual
Summary of Contents for RELION 650 SERIES
Page 1: ...RELION 650 SERIES Line distance protection REL650 Version 2 2 Technical manual ...
Page 2: ......
Page 46: ...40 ...
Page 56: ...50 ...
Page 164: ...158 ...
Page 264: ...258 ...
Page 304: ...298 ...
Page 320: ...314 ...
Page 338: ...332 ...
Page 438: ...432 ...
Page 468: ...462 ...
Page 534: ...528 ...
Page 646: ...640 ...
Page 660: ...654 ...
Page 676: ...670 ...
Page 800: ...794 ...
Page 836: ...830 ...
Page 890: ...884 ...
Page 894: ...888 ...
Page 940: ...934 ...
Page 941: ...935 ...