ABB RET670 - Setting Parameters

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.
3.13.1.3 Setting parameters
Table 198: ECPSCH (85) Group settings (basic)
Name Values (Range) Unit Step Default Description
Operation Disabled
Enabled
- - Disabled Disable/Enable Operation
SchemeType Disabled
Intertrip
Permissive UR
Permissive OR
Blocking
- - Permissive UR Scheme type, Mode of Operation
tCoord 0.000 - 60.000 s 0.001 0.035 Communication scheme channel coordination
time
tSendMin 0.000 - 60.000 s 0.001 0.100 Minimum duration of a carrier send signal
(carrier continuation)
Table 199: ECPSCH (85) Group settings (advanced)
Name
Values (Range) Unit Step Default Description
Unblock Disabled
NoRestart
Restart
- - Disabled Operation mode of unblocking logic
tSecurity 0.000 - 60.000 s 0.001 0.035 Security timer for loss of carrier guard detection
3.13.2 Current reversal and weak-end infeed logic for residual
overcurrent protection ECRWPSCH (85)
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Current reversal and weak-end infeed
logic for residual overcurrent protection
ECRWPSCH - 85
1MRK504116-UUS C Section 3
IED application
731
Application manual