IEC 60947-4-1 Co-ordination with Short Circuit Protective Devices:
The rated conditional short-circuit current of contactors and starters backed up by short-circuit protective devices(s) (SCPD); combination starters and protected starters shall be verified by short circuit tests as specified.

These tests are mandatory.

Type '1' co-ordination requires that under short-circuit conditions the contactor or starter shall cause no danger to persons or the installation and may not be suitable for further service without repair or replacement of parts.

Type '2' co-ordination requires that under short-circuit conditions the contactor or starter shall cause no danger to persons or the installation and shall be suitable for further use. The risk of contact welding is recognised, in which case the manufacturer shall indicate the measures to be taken as regards the maintenance of the equipment.

Note: Use of an SCPD not in compliance with the manufacturers recommendations may invalidate the co-ordination.

The general requirement for short circuit tests is that contactors and starters intended to be used in enclosures shall be tested in the smallest enclosure stated by the manufacturer.

Type 2 Co-ordination & ADS7 Starters:
The back up fuses quoted give type 2 co-ordination as defined in BS EN 60947-4-1 up to 80kA prospective at 415V 3ph. In selected cases it is possible to use Memshield 2 miniature circuit breakers to provide back up protection for automatic starters up to 10kA prospective at 415V 3 phase.