HL30-100 series isolating switch (HL30 isolating switch) applied to ac 50 hz or 60 hz, rated voltage 230 v or 400 v and below, power distribution and control circuits of electric current - 100 - a the upper part of the distribution equipment and power supply without load points between us. Mainly as the terminal apparatus of the master switch, also can be used to control all kinds of electric motors, small power electrical appliances, lighting and other places