Page 97 - Sace Emax 2 Manual for design engineers

ABB | SACE Emax 2
12 - Functions

Introduction This chapter includes the trip curves of the protections, which are shown in different point charts:
• The curves are illustrated considering the minimum and maximum values and of the parameters of each
protection.
• 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 92)
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.

Function L (t = k/I )
2

95 | © 2020 ABB | 1SDH001330R1002 - ECN000134959 - Rev. A Ekip Touch - Protections | 12 - Functions