ABB 615 series Technical Manual page 619

1MAC059074-MB A
615 series ANSI
Technical Manual
GUID-846395DB-B778-4782-A6FA-9D7B62D92F65-ANSI V2 EN
Figure 309: Behavior of different IDMT reset modes. Operate signal is based on
settings Type of reset curve = "Def time reset" and Type of time reset=
"Freeze Op timer". The effect of other reset modes is also presented
The Time multiplier setting is used for scaling the IDMT trip times.
The Minimum trip time setting parameter defines the minimum desired trip time for
IDMT. The setting is applicable only when the IDMT curves are used.
The Minimum trip time setting should be used with care because the
operation time is according to the IDMT curve, but always at least the
Section 4
Protection functions
613