ABB RELION 670 SERIES REG670, Applications Manual

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BFI : The BFI output indicates that the level Pickup1> has been reached. It can be used
to initiate time measurement.
TRIP : The TRIP output is activated after the operate time for the V/f level has expired.
TRIP signal is used to trip the circuit breaker(s).
ALARM : The output is activated when the alarm level has been reached and the alarm
timer has elapsed. When the system voltage is high this output sends an alarm to the
operator.
10.4.3.2 Settings
M6496-91 v7
GlobalBaseSel : Selects the global base value group used by the function to define
IBase , VBase and SBase as applicable.
Operation : The operation of the Overexcitation protection OEXPVPH (24) can be set
to Enabled / Disabled .
MeasuredV : The phases involved in the measurement are set here. Normally the three
phase measurement measuring the positive sequence voltage should be used but when
only individual VT's are used a single phase-to-phase can be used.
MeasuredI: The phases involved in the measurement are set here. MeasuredI: must be
in accordance with MeasuredV .
Pickup1 : Operating level for the inverse characteristic, IEEE or tailor made. The
operation is based on the relation between rated voltage and rated frequency and set as
a percentage factor. Normal setting is around 108-110% depending of the capability
curve for the transformer/generator.
Pickup2 : Operating level for the t_MinTripDelay definite time delay used at high
overvoltages. The operation is based on the relation between rated voltage and rated
frequency and set as a percentage factor. Normal setting is around 110-180%
depending of the capability curve of the transformer/generator. Setting should be above
the knee-point when the characteristic starts to be straight on the high side.
XLeakage : The transformer leakage reactance on which the compensation of voltage
measurement with load current is based. The setting shall be the transformer leak
reactance in primary ohms. If no current compensation is used (mostly the case) the
setting is not used.
t_TripPulse : The length of the trip pulse. Normally the final trip pulse is decided by the
trip function block. A typical pulse length can be 50 ms.
CurveType : Selection of the curve type for the inverse delay. The IEEE curves or tailor
made curve can be selected depending of which one matches the capability curve best.
1MRK 502 071-UUS A
Section 10
Voltage protection
Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062 457
Application manual