P44x/EN AD/E44
Update Documentation
Page 24/82
MiCOM P441, P442 & P444
4.9
DEF Protection Against High Resistance Ground Faults
…/…
.
•
In backup-operating mode SBEF (Stand-By Earth Fault), an inverse/definite time
ground overcurrent element with 4 stages is selectable. A communication channel is
not used-OR- azero sequence power (since version B1.x) with IDMT Time Delay
(see section 5 in chapter P44x/EN AP)
…/…
When used on the same signalling channel (shared scheme selected by MiCOM S1) as
the distance protection, if the distance protection picks up, it has priority (the output from the
DEF element is blocked from asserting the Carrier Send common output).
…/…
Legend For Tripping Logic Diagrams (DEF)
Abbreviation Definition
Vr>
Threshold of residual or zero sequence voltage (3Vo)
IRev
Threshold of residual current (settable in S1 – default:0,6IN)
Forward
Forward directional with zero/negative sequence polarisation
Reverse
Reverse directional with zero/negative sequence polarisation
DEF blocking
Blocking of DEF element
Carrier Receive DEF
Carrier received for the principal line protected (same channel as
distance protection)
Iev
Threshold of residual current (0.6 x Ied)
Tripping mode
Single or three-phase tripping (selectable)
Z< starting
Convergence at least 1 of 6 loops within the tripping characteristic
(internal starting of the distance element)
t_cycle
Additional time delay (150ms) of 1 pole AR cycle
t_delay
Tripping time delay
t_trans
Carrier Send delay settable
Содержание MiCOM P441
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Страница 5: ...Pxxxx EN SS C11 SAFETY SECTION...
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Страница 97: ...Update Documentation P44x EN AD E44 MiCOM P441 P442 P444 Page 79 82 TECHNICAL DATA P44X EN TD E33...
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Страница 101: ...Introduction P44x EN IT E33 MiCOM P441 P442 P444 INTRODUCTION...
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Страница 152: ...P44x EN HW E33 Relay Description Page 24 44 MiCOM P441 P442 P444 Example isolated AC fault...
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Страница 173: ...Application Notes P44x EN AP E33 MiCOM P441 P442 P444 APPLICATION NOTES...
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Страница 395: ...Technical Data P44x EN TD E33 MiCOM P441 P442 P444 TECHNICAL DATA...
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Страница 427: ...Installation P44x EN IN E33 MiCOM P441 P442 P444 INSTALLATION...
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Страница 439: ...Commissioning P44x EN CM E33 MiCOM P441 P442 P444 COMMISSIONING...
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Страница 494: ...P44x EN CM E33 Commissioning Page 54 54 MiCOM P441 P442 P444 BLANK PAGE...
Страница 495: ...Commissioning Test Record Sheets P44x EN RS E33 MiCOM P441 P442 P444 COMMISSIONING TEST RECORD SHEETS...
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Страница 507: ...Connection Diagrams P44x EN CO E33 MiCOM P441 P442 P444 CONNECTION DIAGRAMS...
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Страница 521: ...Courrier Data Base P44x EN GC E44 MiCOM P441 P442 P444 CONFIGURATION MAPPING...
Страница 610: ...Courier Data Base P44x EN GC E44 MiCOM P441 P442 P444 DEFAULT PROGRAMMABLE SCHEME LOGIC PSL...
Страница 615: ...Menu Content Tables P44x EN HI E44 MiCOM P441 P442 P444 MENU CONTENT TABLES...
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