Overview
The ability to accurately and reliably classify different types of fault so that single phase tripping and autoreclosing can be used plays an important roll in today’s power systems. The “Faulty phase identification with load encroachment” function is design to ccurately select the proper fault loop(s) in the distance function dependent on the fault type.
For more detailed information on “Faulty phase identification with load encroachment” function, refer to ABB, Relion 670 Series manuals.
To see other supported functions, click here.
Function Identification
| Function description | IEC 61850 identification |
IEC 60617 identification |
ANSI/IEEE C37.2 device number |
| Faulty phase identification with load encroachment for mho | FMPSPDIS | Z< | 21 |
Signals & Setting Parameters
FMPSPDIS function block
FMPSPDIS Input signals
| FMPSPDIS Input signals | |||
| Name | Type | Default | Description |
| I3P | GROUP SIGNAL | – | Group signal for current |
| U3P | GROUP SIGNAL | – | Group signal for voltage |
| BLOCK | BOOLEAN | 0 | Block of function |
| ZSTART | BOOLEAN | 0 | Start from underimpdeance function |
| TR3PH | BOOLEAN | 0 | Three phase tripping initiated |
| 1POLEAR | BOOLEAN | 0 | Single pole autoreclosing in progress |
FMPSPDIS Output signals
| FMPSPDIS Output signals | |||
| Name | Type | Description | |
| STL1 | BOOLEAN | Fault detected in phase L1 | |
| STL2 | BOOLEAN | Fault detected in phase L2 | |
| STL3 | BOOLEAN | Fault detected in phase L3 | |
| STPE | BOOLEAN | Earth fault detected | |
| STCNDPHS | INTEGER | Binary coded starts from phase selection | |
| STCNDPLE | INTEGER | Binary coded starts from ph sel with load encroachment | |
| STCNDLE | INTEGER | Binary coded starts from load encroachment only | |
| START | BOOLEAN | Indicates that something has started | |
FMPSPDIS Group settings (basic)
| FMPSPDIS Group settings (basic) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| IMaxLoad | 10 – 5000 | %IB | 1 | 200 | Maximum load for identification of three phase fault in % of IBase |
| RLd | 1.00 – 3000.00 | Ohm/p | 0.01 | 80.00 | Load encroachment resistive reach in ohm/phase |
| ArgLd | 5 – 70 | Deg | 1 | 20 | Load encroachment inclination of load angular sector |
FMPSPDIS Group settings (advanced)
| FMPSPDIS Group settings (advanced) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| DeltaIMinOp | 5 – 100 | %IB | 1 | 10 | Delta current level in % of IBase |
| DeltaUMinOp | 5 – 100 | %UB | 1 | 20 | Delta voltage level in % of UBase |
| U1Level | 5 – 100 | %UB | 1 | 80 | Pos seq voltage limit for identification of 3-ph fault |
| I1LowLevel | 5 – 200 | %IB | 1 | 10 | Pos seq current level for identification of 3-ph fault in % of IBase |
| U1MinOp | 5 – 100 | %UB | 1 | 20 | Minimum operate positive sequence voltage for ph sel |
| U2MinOp | 1 – 100 | %UB | 1 | 5 | Minimum operate negative sequence voltage for ph sel |
| INRelPE | 10 – 100 | %IB | 1 | 20 | 3I0 limit for release ph-e measuring loops in % of max phase current |
| INBlockPP | 10 – 100 | %IB | 1 | 40 | 3I0 limit for blocking phase-to-phase measuring loops in % of max phase current |
FMPSPDIS Non group settings (basic)
| FMPSPDIS Non group settings (basic) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| GlobalBaseSel | 1 – 12 | – | 1 | 1 | Selection of one of the Global Base Value groups |
Logics & highlights
Definition of fault sectors for phase-to-phase fault
Definition of faulty phase sector as angle between U2 and I0
Directional element used to release the measured angle between Uo and I0
U2 and U1 angle relationship
Simplified diagram for fault evaluation, phase L1
Influence on the characteristic by load encroachment logic
