Settings - ABB REL650 series Technical Manual

1MRK 506 335-UUS A
12.1.5
Table 333: ZCPSCH (85) Group settings (basic)
Name Values (Range)
Operation Disabled
Enabled
SchemeType Intertrip
Permissive UR
Permissive OR
Blocking
DeltaBlocking
tCoord 0.000 - 60.000
tSendMin 0.000 - 60.000
Table 334: ZCPSCH (85) Group settings (advanced)
Name Values (Range)
Unblock Disabled
NoRestart
Restart
DeltaI 0 - 200
DeltaV 0 - 100
Delta3I0 0 - 200
Delta3V0 0 - 100
tSecurity 0.000 - 60.000
Table 335: ZCPSCH (85) Non group settings (advanced)
Name Values (Range)
GlobalBaseSelector 1 - 6
12.1.6
Technical manual

Settings

Unit Step
- -
- -
s 0.001
s 0.001
Unit Step
- -
%IB 1
%VB 1
%IB 1
%VB 1
s 0.001
Unit Step
- 1
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 on a received signal
Scheme communication
Default Description
Disabled Disable/Enable Operation
Permissive UR Scheme type
0.035 Communication scheme channel coordination
time
0.100 Minimum duration of a carrier send signal
(carrier continuation)
Default Description
Disabled Operation mode of unblocking logic
10 Current change level in % of IB for fault
inception detection
5 Voltage change level in % of UB for fault
inception detection
10 Zero seq current change level in % of IB
5 Zero seq voltage change level in % of UB
0.035 Security timer for loss of carrier guard detection
Default Description
1 Selection of one of the Global Base Value
groups
Section 12
497