DirModeSelx
: The directional mode of step x. Possible settings are off/nondirectional/
forward/reverse.
Characteristx
: Selection of time characteristic for step
x
. Definite time delay and
different types of inverse time characteristics are available.
Table 38:
Inverse time characteristics
Curve name
ANSI Extremely Inverse
ANSI Very Inverse
ANSI Normal Inverse
ANSI Moderately Inverse
ANSI/IEEE Definite time
ANSI Long Time Extremely Inverse
ANSI Long Time Very Inverse
ANSI Long Time Inverse
IEC Normal Inverse
IEC Very Inverse
IEC Inverse
IEC Extremely Inverse
IEC Short Time Inverse
IEC Long Time Inverse
IEC Definite Time
User Programmable
ASEA RI
RXIDG (logarithmic)
The different characteristics are described in the Technical Reference Manual (TRM).
Pickupx
: Operation negative sequence current level for step x given in % of
IBase
.
tx
: Definite time delay for step
x
. The definite time
tx
is added to the inverse time when
inverse time characteristic is selected. Note that the value set is the time between
activation of the start and the trip outputs.
TDx
: Time multiplier for the dependent (inverse) characteristic.
IMinx
: Minimum pickup current for step x in % of
IBase
. Set
IMinx
below
Pickupx
for
every step to achieve ANSI reset characteristic according to standard. If
IMinx
is set
above
Pickupx
for any step the ANSI reset works as if current is zero when current
drops below
IMinx
.
Section 9
1MRK 502 071-UUS A
Current protection
380
Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062
Application manual
Summary of Contents for RELION 670 SERIES REG670
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