ABB RELION 670 SERIES REG670 - General Settings of the Instance; Settings for OC1

The setting of the function in the inadvertent energization application is done as
described below. It is assumed that the instance is used only for the inadvertent
ener
gization application. It is however possible to extent the use of the instance by
using OC2, UC1, UC2, OV2, UV2 for other protection applications.
12.1.3.8 General settings of the instance
SEMOD158317-11 v3
Operation: With the parameter Operation the function can be set EnabledOn/
OffDisabled.
CurrentInput: The current used for the inadvertent energization application is set by the
parameter CurrentInput. Here the setting MaxPh is chosen.
GlobalBaseSel: Selects the global base value group used by the function to define
(IBase), (UBase) and (SBase).
VoltageInput: The Voltage used for the inadvertent energization application is set by
the parameter VoltageInput. Here the setting MaxPh-Ph is chosen.
OperHarmRestr: No 2nd harmonic restrain is used in this application: OperHarmRestr
is set Disabled. It can be set Enabled if the instance is used also for other protection
functions.
EnRestrainCurr: The restrain current function is not used in this application:
EnRestrainCurr is set Disabled. It can be set Enabled if the instance is used also for
other protection functions.
12.1.3.9 Settings for OC1
SEMOD158317-24 v3
Operation_OC1: The parameter Operation_OC1 is set Enabled to activate this
function.
PickupCurr_OC1: The operate current level for OC1 is set by the parameter
PickupCurr_OC1. The setting is made in % of IBase. The setting should be made so
that the protection picks up at all situations when the generator is switched on to the
grid at stand still situations. The generator current in such situations is dependent of the
short circuit capacity of the external grid. It is however assumed that a setting of 50%
of the generator rated current will detect all situations of inadvertent energization of the
generator.
CurveType_OC1: The time delay of OC1 should be of type definite time and this is set
in the parameter CurveType_OC1 where ANSI Def. Time is chosen.
tDef_OC1: The time delay is set in the parameter tDef_OC1 and is set to a short time.
0.05 s is recommended. Note that the value set is the time between activation of the
start and the trip outputs.
1MRK 502 071-UUS A Section 12
Multipurpose protection
Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062 499
Application manual