ABB RET670 - Page 412

MultPUx: Multiplier for scaling of the current setting value. If a binary input signal
(enableMultiplier) is activated the current operation level is increase by this setting
constant. Setting range: 1.0-10.0
txMin: Minimum operate time for all 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. Setting
range: 0.000 - 60.000s in steps of 0.001s.
Current
Operate
time
IMinx
txMin
IEC10000058-1-en.vsd
IEC10000058 V1 EN
Figure 184: Minimum operate current and operation time for inverse time
characteristics
In order to fully comply with curves definition setting parameter txMin shall be set to
the value, which is equal to the operating time of the selected inverse curve for
measured current of twenty times the set current pickup value. Note that the operating
time value is dependent on the selected setting value for time multiplier kx.
ResetTypeCrvx: The reset of the delay timer can be made in different ways. By
choosing setting the possibilities are according to table
88.
Section 3 1MRK504116-UUS C
IED application
406
Application manual