Setting Guidelines - ABB REC670 Applications Manual

1MRK 511 401-UEN A
15.2.3
15.2.3.1
15.2.3.2
Bay control REC670 2.2 IEC
Application manual
protection at the remote line end and in this way prevents the correct operation
of a complete protection scheme.
• A separate direct intertrip channel must be arranged from remote end when a
trip or accelerated trip is given there. The intertrip receive signal is connect to
input CRL.
• The WEI function shall be set to WEI=Echo&Trip. The WEI function block
will then give phase selection and trip the local breaker.
Avoid using WEI function at both line ends. It shall only be activated at the weak-
end.

Setting guidelines

The parameters for the current reversal logic and the weak-end infeed logic (WEI)
function are set via the local HMI or PCM600.
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.
Current reversal logic
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.
Weak-end infeed logic
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.
Section 15
Scheme communication
IP15024-1 v1
M13856-4 v5
M13856-6 v6
M13856-10 v7
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