ABB Relion 650 Series Technical Manual page 112

Section 5
Impedance protection
Name Values (Range)
OffsetMhoDir2 Non-directional
Forward
Reverse
BlinderMode2 Disabled
Enabled
LoadEnchMode2 Disabled
Enabled
LoadEnchMode3 Disabled
Enabled
BlinderMode3 Disabled
Enabled
LoadEnchMode4 Disabled
Enabled
BlinderMode4 Disabled
Enabled
LoadEnchMode5 Disabled
Enabled
BlinderMode5 Disabled
Enabled
OffsetMhoDir5 Non-directional
Forward
Reverse
OffsetMhoDir4 Non-directional
Forward
Reverse
OffsetMhoDir3 Non-directional
Forward
Reverse
Table 29: ZMOPDIS (21) Non group settings (basic)
Name Values (Range)
GlobalBaseSel 1 - 6
5.3.6 Operation principle
5.3.6.1 Full scheme measurement
The execution of the different fault loops within the IED are of full scheme type, which means that
each fault loop for phase-to-ground faults and phase-to-phase faults are executed in parallel.
The use of full scheme technique gives faster operation time compared to switched schemes
which mostly uses a phase selector element to select correct voltages and current depending on
fault type. So each distance protection zone performs like one independent distance protection
function with six measuring elements.
106
Unit Step
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
Unit Step
- 1
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Default Description
Non-directional Direction mode for offset mho of zone 2
Disabled Blinder mode Off/On of zone 2
Disabled Load enchroachment mode Off/On of
zone 2
Disabled Load enchroachment mode Off/On of
zone 3
Disabled Blinder mode Off/On of zone 3
Disabled Load enchroachment mode Off/On of
zone 4
Disabled Blinder mode Off/On of zone 4
Disabled Load enchroachment mode Off/On of
zone 5
Disabled Blinder mode Off/On of zone 5
Non-directional Direction mode for offset mho of zone 5
Non-directional Direction mode for offset mho of zone 4
Non-directional Direction mode for offset mho of zone 3
Default Description
1 Selection of one of the Global Base Value
groups
1MRK 506 326-UUS B
SEMOD154224-4 v2
Line distance protection REL650
Technical manual