ABB RELION 670 Series Technical Manual page 278

Section 7
Impedance protection
Function
Dynamic overreach
Definite time delay phase-
phase and phase-ground
operation
Trip time
Reset ratio
Reset time at 0.1 x Zreach to 2
x Zreach
7.7 Phase selection, quadrilateral characteristic with
settable angle FRPSPDIS (21)
7.7.1 Identification
Function description
Phase selection, quadrilateral
characteristic with settable angle
7.7.2 Functionality
The ability to accurately and reliably classify the different types of fault, so that single pole
tripping and autoreclosing can be used plays an important role in today's power systems. Phase
selection, quadrilateral characteristic with settable angle FRPSPDIS (21) is designed to accurately
select the proper fault loop in the distance function dependent on the fault type.
The heavy load transfer that is common in many transmission networks may make fault resistance
coverage difficult to achieve. Therefore, FRPSPDIS (21) has a built-in algorithm for load
encroachment, which gives the possibility to enlarge the resistive setting of both the phase
selection and the measuring zones without interfering with the load.
The extensive output signals from the phase selection gives also important information about
faulty phase(s) which can be used for fault analysis.
A current-based phase selection is also included. The measuring elements continuously measure
three phase currents and the residual current and, compare them with the set values.
272
Range or value Accuracy
<5% at 85 degrees -
measured with
CVT's and
0.5<SIR<30
(0.000-60.000) s ±0.2% or ±40 ms whichever is greater
25 ms typically IEC 60255-121
105% typically -
Min. = 20 ms -
Max. =50 ms
IEC 61850 IEC 60617
identification identification
FRPSPDIS
SYMBOL-DD V1 EN-US
GUID-29E9C424-5AF7-40EE-89D9-F6BB4F0A0836 v2
GUID-07DB9506-656C-4E5F-A043-3DAA624313C7 v2
ANSI/IEEE C37.2
device number
21
Z<phs
GUID-A15350C8-CFA9-4BD9-9DE1-5D5814290F61 v3
1MRK 502 066-UUS B
Technical manual