Our ABB R-Mag Siemens Interface works with Siemens SDV6 38KV-25-12-RP with 10-pin test plug interface. This is a custom-made interface cable based on the traditional R-Mag that tests  ABB R-Mag systems. This allows high-current testing of the R-Mag with the SPS Test System  (sold separately).
The cable uses a large Amphenol plug on one end to interface with the SPS Test System, and a custom-made interface box and cable connection to the R-Mag under test for the other end. To order, let us know what type of R-Mag system you are using. 
Works with the ABB 10-position test plug purchased from ABB (#1164046). Two required.