Table 137: FRPSPDIS (21) Group settings (advanced)
Name Values (Range) Unit Step Default Description
TimerPP Disabled
Enabled
- - Disabled Operation mode Disable/Enable of Zone
timer, Ph-Ph
tPP 0.000 - 60.000 s 0.001 3.000 Time delay to trip, Ph-Ph
TimerPE Disabled
Enabled
- - Disabled Operation mode Disable/ Enable of Zone
timer, Ph-G
tPG 0.000 - 60.000 s 0.001 3.000 Time delay to trip, Ph-E
Table 138: FRPSPDIS (21) 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
7.7.6 Operation principle
GUID-163B55DE-056F-4CB9-A401-78F9F4897903 v2
Phase selection, quadrilateral characteristic with settable angle (FRPSPDIS, 21) includes six
impedance measuring loops; three intended for phase-to-ground faults, and three intended for
phase-to-phase as well as for three-phase faults.
The difference, compared to the distance zone measuring function, is in the combination of the
measuring quantities (currents and voltages) for different types of faults.
The characteristic is basically non-directional, but FRPSPDIS (21) uses information from the
directional function ZDRDIR to discriminate whether the fault is in forward or reverse direction.
The pickup condition PHSELZ is essentially based on the following criteria:
• Residual current criteria, that is, separation of faults with and without ground connection
• Regular quadrilateral impedance characteristic
• Load encroachment characteristics is always active but can be switched off by selecting a
high setting.
The current pickup condition PHSELI is based on the following criteria:
• Residual current criteria
• No quadrilateral impedance characteristic. The impedance reach outside the load area is
theoretically infinite. The practical reach, however, will be determined by the minimum
operating current limits.
• Load encroachment characteristic is always active, but can be switched off by selecting a high
setting.
The PHSELI output is non-directional. The directionality is determined by the distance zones
directional function ZDRDIR.
There are output from FRPSPDIS (21) that indicate whether a pickup is in forward or reverse
direction or non-directional, for example FWD_A, REV_A and NDIR_A.
1MRK 502 066-UUS B Section 7
Impedance protection
275
Technical manual
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