Curve name
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. Used if definite time characteristic is chosen.
TDx: Time multiplier for the dependent (inverse) characteristic.
IMinx: Minimum operate 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.
MultPUx: Multiplier for scaling of the current setting value. If a binary input signal
(ENMULTx) is activated the current operation level is multiplied by this setting constant.
txMin: Minimum operation time for inverse time characteristics. At high currents the
inverse time characteristic might give a very short operation time. By setting this
parameter the operation time of the step can never be shorter than the setting.
ResetTypeCrvx: The reset of the delay timer can be made in different ways. By
choosing setting there are the following possibilities:
Curve name
Instantaneous
IEC Reset (constant time)
ANSI Reset (inverse time)
The different reset characteristics are described in the Technical Reference Manual
(TRM). There are some restrictions regarding the choice of reset delay.
For the independent time delay characteristics the possible delay time settings are
instantaneous (1) and IEC (2 = set constant time reset).
For ANSI inverse time delay characteristics all three types of reset time characteristics
are available; instantaneous (1), IEC (2 = set constant time reset) and ANSI (3 =
current dependent reset time).
Section 3 1MRK504116-UUS C
IED application
444
Application manual
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