This data sheet describes the requirements for delayed transfer automatic transfer systems (ATS) for two-source secondary selective substations, as discussed in ELSSG04 - Automatic Transfer Systems for Secondary Selective Substations.
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Information technology - Data interchange on 90 mm flexible disk cartridges using modified frequency modulation recording at 31 831 ftprad on 80 tracks on each side - ISO Type 303
Information technology - 3,81 mm wide magnetic tape cartridge for information interchange - Helical scan recording - DDS-DC format using 60 m and 90 m length tapes