Settings; Operation Principle - ABB REL650 Technical Manual

1MRK 506 382-UEN A
12.1.5
Table 251: ZCPSCH Group settings (basic)
Name Values (Range)
Operation
SchemeType
tCoord
tSendMin
Table 252: ZCPSCH Group settings (advanced)
Name Values (Range)
Unblock
DeltaI
DeltaU
Delta3I0
Delta3U0
tSecurity
Table 253: ZCPSCH Non group settings (advanced)
Name Values (Range)
GlobalBaseSelector
12.1.6
Line distance protection REL650 2.2 IEC
Technical manual

Settings

Unit
Off -
On
Intertrip -
Permissive UR
Permissive OR
Blocking
DeltaBlocking
0.000 - 60.000 s
0.000 - 60.000 s
Unit
Off -
NoRestart
Restart
0 - 200 %IB
0 - 100 %UB
0 - 200 %IB
0 - 100 %UB
0.000 - 60.000 s
Unit
1 - 12 -

Operation principle

Depending on whether a reverse or forward directed impedance zone is used to
issue the send signal, the communication schemes are divided into blocking and
permissive schemes, respectively.
A permissive scheme is inherently faster and has better security against false
tripping than a blocking scheme. On the other hand, a permissive scheme depends
Step Default
- Off
- Permissive UR
0.001 0.035
0.001 0.100
Step Default
- Off
1 10
1 5
1 10
1 5
0.001 0.035
Step Default
1 1
Section 12
Scheme communication
Description
Operation Off / On
Scheme type
Co-ordination time for blocking
communication scheme
Minimum duration of a carrier send
signal
Description
Operation mode of unblocking logic
Current change level in % of IBase for
fault inception detection
Voltage change level in % of UB for fault
inception detection
Zero seq current change level in % of
IBase
Zero seq voltage change level in % of
UBase
Security timer for loss of carrier guard
detection
Description
Selection of one of the Global Base
Value groups
PID-3766-SETTINGS v7
M13893-3 v5
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