SINOTIMER CN109S-380V 16A 3 Phase Timer Switch 7-Day Programmable Minimum Interval 1s With Backlight1. 7 day programmable stable three phase high performance timer switch, three live wire inputs, three live wire outputs, without neutral wire, which solves the problem of some customers having inconvenient connecting the neutral wire. Just set a few opening and closing points. 2. A total of 28 openings and 28 closings can be set arbitrarily from Monday to Sunday, with a minimum interval of one second and a maximum of 168 hours (equivalent to one