Are the shorting contactors supplied with all Altistart ATS46`s?
No, the open style (non-enclosed) ATS46`s do not include shorting contactors.
However, there are enclosed soft starters that utilize the ATS46 and shorting contactors. See the Digest 172 pages 24-23 to 24-29, Catalog No. 8636CT9701R2/00 or the most recent AC Drives and Soft Starts pricing guide for details.