Setting Parameters - ABB RET670 Applications Manual

1MRK504116-UUS C
3.13.1.3
Table 198: ECPSCH (85) Group settings (basic)
Name Values (Range)
Operation Disabled
Enabled
SchemeType Disabled
Intertrip
Permissive UR
Permissive OR
Blocking
tCoord 0.000 - 60.000
tSendMin 0.000 - 60.000
Table 199: ECPSCH (85) Group settings (advanced)
Name Values (Range)
Unblock Disabled
NoRestart
Restart
tSecurity 0.000 - 60.000
3.13.2
Application manual
tCoord: Delay time for trip from ECPSCH (85) function. For Permissive under/
overreaching schemes, this timer shall be set to at least 20 ms plus maximum reset time
of the communication channel as a security margin. For Blocking scheme, the setting
should be > maximum signal transmission time +10 ms.
Unblock: Select Off if unblocking scheme with no alarm for loss of guard is used. Set
to Restart if unblocking scheme with alarm for loss of guard is used.

Setting parameters

Unit Step
- -
- -
s 0.001
s 0.001
Unit Step
- -
s 0.001
Current reversal and weak-end infeed logic for residual
overcurrent protection ECRWPSCH (85)
Function description
Current reversal and weak-end infeed
logic for residual overcurrent protection
Default Description
Disabled Disable/Enable Operation
Permissive UR Scheme type, Mode of Operation
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
0.035 Security timer for loss of carrier guard detection
IEC 61850 IEC 60617
identification identification
ECRWPSCH
Section 3
IED application
ANSI/IEEE C37.2
device number
- 85
731