ABB Relion 670 series - Intertrip Scheme

16.1.3.6 Intertrip scheme
Set Operation = Enabled
Set SchemeType = Intertrip
Set tCoord = 50 ms (10 ms + maximal transmission time)
Set tSendMin = 0.1 s (0 s in parallel line applications)
Set Unblock = Disabled
Set tSecurity = 0.015 s
16.2 Phase segregated scheme communication logic for
distance protection ZC1PPSCH (85)
16.2.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Phase segregated Scheme
communication logic for distance
protection
ZC1PPSCH
- 85
16.2.2 Application
To achieve fast fault clearing for a fault on the part of the line not covered by the
instantaneous zone1, the stepped distance protection function can be supported with logic
that uses communication channels.
For the Phase segregated scheme communication logic for distance protection
(ZC1PPSCH ,85) three channels in each direction, which can transmit an on/off signal is
required.
The performance and security of this function is directly related to the transmission
channels speed, and security against false or lost signals. Special communication channels
are used for this purpose. When power line carrier is used for communication, these
special channels are strongly recommended due to the communication disturbance caused
by the primary fault.
Communication speed, or minimum time delay, is always of utmost importance because
the purpose for using communication is to improve the total tripping speed of the scheme.
To avoid false signals that could cause false tripping, it is necessary to pay attention to the
security of the communication channel. At the same time, it is important pay attention to
the communication channel dependability to ensure that proper signals are communicated
Section 16 1MRK 506 369-UUS -
Scheme communication
756 Line distance protection REL670 2.2 ANSI
Application manual