... constant current limit soft start External terminals Introductions ClassfiyTerminal MarkTerminal NamespecificationMain CircuitR.S.TAC main circuit power inputConnect 3 phase ... ,operation,stop,restartanalog output0-20MA,4-20MA for choosingdefencivefunctionsoft starter protectionover current,overload, overheating, unbalanced three-phase,light ... dust etcType of coolingnature wind cooling SR8 SOFT STARTER