Application Notes - ABB ESP M1R Installation Instructions Manual

9.

Application notes

9.1 ESP coordination
ESP M1/M1R units are designed to fully coordinate with
ESP units of equivalent system voltage on the same
installation. For example the ESP 415 M2 located at the
main distribution panel would coordinate effectively with
the ESP 415 M1 unit typically located at sub-distribution
panels. No additional de-coupling elements such as
inductors are needed to ensure ESP units achieve
coordination.
Always ensure ESP units are used on the same
installation to ensure coordination. Mixing ESP units with
alternative manufacturers' units could result in damage
to both protection units and connected equipment
through poor coordination.
9.2 RCD units
ESP units should ideally be installed before (or upstream
of) residual current devices (RCDs) and not on the load
side. ESP units should only be installed on the load side
of the RCDs if the load in question is external to the
building.
9/1 | Installation instructions for mains wire-in protectors