P12y/EN AP/D32
Application Guide
Page 10/74
MiCOM P125/P126 & P127
Each directional threshold consists of:
−
Current threshold
−
RCA angle /Torque angle and Trip boundary zone
The system voltage provides the polarisation signal, the minimum voltage operating value is
0.6V secondary for the voltage input range 57-130V and 3V for the voltage input range 220-
480V.
The first and second thresholds can be set as definite delay time or inverse delay time using
the IEC, IEEE/ANSI, CO, RI and RECT curves where their parameters are shown in the
Technical Data of this Technical Guide.
The third threshold can be set as definite delay time only, but can be set to work on the peak
of the current measured in non-directional way.
The protection elements trip when the following conditions occur:
−
The phase current exceeds the set overcurrent threshold.
−
The current vector lies within the trip boundary zone.
The following diagrams show the functionality for each threshold
Lock the timer
IA & (IA^VBC) >
DT/IDMT
Fwd. Inst. I>
Fwd. Trip I>
LOGIC OF THE FIRST THRESHOLD I> FOR THE 67 PROTECTION
Fwd. IA> on relay 2...8
Fwd. IB> on relay 2...8
Fwd. IC> on relay 2...8
IB & (IB^VCA) >
IC & (IC^VAB) >
DT/IDMT
DT/IDMT
P0355ENb
≥
Blocking Logic
Rev. Inst. I>
Fwd: forward
Rev: reverse
≥
Содержание MiCOM P125
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Страница 5: ...Pxxxx EN SS B11 SAFETY SECTION...
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Страница 17: ...Getting Started P12y EN GS D32 MiCOM P125 P126 P127 GETTING STARTED...
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Страница 79: ...User Guide P12y EN FT D32 MiCOM P125 P126 P127 USER GUIDE...
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Страница 167: ...Technical Data P12y EN TD D32 MiCOM P125 P126 P127 TECHNICAL DATA AND CHARACTERISTIC CURVES...
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Страница 273: ...Commissioning and Maintenance P12y EN CM C22 MiCOM P125 P126 P127 COMMISSIONING AND MAINTENANCE GUIDE...
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Страница 299: ...Connections and Wiring Diagrams P12y EN CO C22 MiCOM P125 P126 P127 CONNECTIONS AND WIRING DIAGRAMS...
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Страница 311: ...Commissioning Test and Record Sheet P12y EN RS D32 MiCOM P125 P126 P127 COMMISSIONING TEST AND RECORD SHEET...
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