Setting Guidelines - ABB RELION 670 SERIES Applications Manual

1MRK 506 369-UUS -
16.4.3
Line distance protection REL670 2.2 ANSI
Application manual
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 connected to input CRL.
• The WEI function shall be set to OperationWEI=Echo&Trip. The WEI function
block will then give phase selection and trip the local breaker.

Setting guidelines

The parameters for the current reversal and weak-end infeed logic for phase segregated
communication function (ZC1WPSCH) 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 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 OperCurrRev to On to activate the function.
Set tDelayRev timer at the maximum reset time for the communication equipment that
gives the carrier receive (CRLx) 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 to involve 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 OperationWEI to Echo, to activate the weak-end infeed function with only echo
function.
Set OperationWEI 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 communications.
Set the voltage criterion UPP< and UPE< for the weak-end trip to 70% of the system base
voltage UBase. The setting should be below the minimum operate voltage of the system
but above the voltage that occurs for fault on the protected line. The phase-to-phase
elements must be verified to not operate for phase to earth faults.
Section 16
Scheme communication
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