ABB Relion, Техническое руководство

Страница: 168 / 778

Name Values (Range) Unit Step Default Description
Z2Rev 0.005 - 3000.000 ohm/p 0.001 30.000 Reverse reach setting for Zone 2
tZ2 0.000 - 60.000 s 0.001 0.500 Time delay to operate for Zone 2
OpModeZ3 Disable-Zone
Enable-Zone
- - Disable-Zone Operation mode of Zone 3
Z3Fwd 0.005 - 3000.000 ohm/p 0.001 30.000 Forward reach setting for Zone 3
Z3Rev 0.005 - 3000.000 ohm/p 0.001 30.000 Reverse reach setting for Zone 3
tZ3 0.000 - 60.000 s 0.001 1.000 Time delay to operate for Zone 3
Table 59: ZGCPDIS (21G) Group settings (advanced)
Name Values (Range) Unit Step Default Description
LoadEnchModeZ3 Disabled
Enabled
- - Disabled Enable load enchroachment mode Zone 3
Table 60: ZGCPDIS (21G) Non group settings (basic)
Name Values (Range) Unit Step Default Description
GlobalBaseSel 1 - 6 - 1 1 Selection of one of the Global Base Value
groups
7.2.6 Operation principle
7.2.6.1 Full scheme measurement
The execution of the different fault loops for phase-to-phase faults are executed in
parallel. The use of full scheme technique gives faster operation time compared to the
switched schemes that uses a pickup element to select correct voltage and current
depending on the fault type.
7.2.6.2 Impedance characteristic
The distance function consists of three zones. Each zone is self polarized offset mho
characteristics with reverse offset. The operating characteristic is in accordance to figure
67 .
Section 7
1MRK 502 048-UUS A
Impedance protection
162
Technical manual