... .380)A Mine flameproof type double-power and many circuits assembly switch is ideal for use in AC 50Hz, 1140V, 660V or ... parameters of the starting accurate tuning amendments, step 1;5. Protective functions of overload, short-circuit, phase loss, current leakage, ... and overvoltage etc;6. Switching time: 0~10s adjustable;7. Protective function of gas, wind and electricity interlocking;8.Function of ...