Functions - ABB SACE Emax 2 Series Operating Instructions Manual

12 - Functions

Introduction This chapter includes the trip curves of the protections, which are shown in different point charts:
Function L (t = k/I
98 | © 2023 ABB | 1SDH001330R1002 - ECN000297030
• The curves are represented considering the maximum and minimum values of the parameters of
each protection, including the TRIP functions provided (current, time).
• Protections with several curves (example: S protection), are shown in several graphs.
• The curves do not take account of the effects of special parameters, such as thermal memory and
startups.
NOTE: it is advisable to always use the mathematical function in the summary table of the
protections to calculate the trip time (page 95 )
This chapter illustrates the electronic trip curves of the available protections with all the protection trip
units for SACE Emax 2 circuit-breakers, represented in various dot diagrams. Some notes for reading the
diagrams:
• The curves are illustrated considering the minimum and maximum values and of the parameters
of each protection.
• The curves do not take account of the effects of special parameters such as thermal memory,
startup, etc.
• Where version is not present, the curves are valid for both the IEC version and the UL version.
NOTE: trip curve modeling software should be consulted when conducting a coordination
or arc flash study as these are simplified representations of the protection curves.
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ABB | SACE Emax 2
Ekip Touch - Protections
12 - Functions