ABB Relion 670 series - Permissive Underreache Scheme

16.2.3.1 Permissive underreache scheme
Set Operation = On
Set Scheme
type
= Permissive UR
Set tCoord = 0 ms
Set tSendMin = 0.1 s
16.2.3.2 Permissive overreach scheme
Set Operation = On
Set Scheme
type
= Permissive OR
Set tCoord = 0 ms
Set tSendMin = 0.1 s
16.2.3.3 Blocking scheme
Set Operation = On
Set Scheme
type
= Blocking
Set tCoord = 25 ms (10 ms + maximal transmission time)
Set tSendMin = 0 s
16.2.3.4 Intertrip scheme
Set
Operation = On
Set Scheme
type
= Intertrip
Set tCoord = 50 ms (10 ms + maximal transmission time)
Set tSendMin = 0.1 s
1MRK 506 369-UUS - Section 16
Scheme communication
Line distance protection REL670 2.2 ANSI 761
Application manual