ABB RER670 - Current Reversal Logic

Common base IED values for primary current (IBase), primary voltage (UBase)
and primary power (SBase) are set in a Global base values for settings function
GBASVAL.
GlobalBaseSel
: It is used to select a GBASVAL function for reference of base
values.
13.2.3.1 Current reversal logic
M13856-6 v6
Set CurrRev to On to activate the function.
Set tDelayRev timer at the maximum reset time for the communication equipment
that gives the carrier receive (CRL) signal plus 30 ms. A minimum setting of 40 ms
is recommended, typical 60 ms.
A long tDelayRev setting increases security against unwanted tripping, but delay
the fault clearing in case of a fault developing from one line that evolves to the
other one. The probability of this type of fault is small. Therefore set tDelayRev
with a good margin.
Set the pick-up delay tPickUpRev to <80% of the minimum sum of breaker operate
time + communication delay time, but with a minimum of 20 ms.
13.2.3.2 Weak-end infeed logic
M13856-10 v7
Set WEI to Echo, to activate the weak-end infeed function with only echo function.
Set WEI to Echo&Trip to obtain echo with trip.
Set tPickUpWEI to 10 ms, a short delay is recommended to avoid that spurious
carrier received signals will activate WEI and cause unwanted carrier send (ECHO)
signals.
Set the voltage criterion UPP< and UPN< for the weak-end trip to 70% of the
system base voltage UBase. The setting should be below the operate voltage of the
system but above the voltage that occurs for fault on the protected line.
13.3 Scheme communication logic for residual
overcurrent protection ECPSCH
IP14711-1 v2
13.3.1 Identification
M14882-1 v2
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Scheme communication logic for
residual overcurrent protection
ECPSCH - 85
Section 13 1MRK 506 375-UEN A
Scheme communication
352 Railway application RER670 2.2 IEC
Application manual