H12-03B

### H12-03B Application Field and Working PrincipleThe H12-03B disconnect switch is widely applied in various industries, mainly in the power industry. It is designed to be an all-around level, safe, reliable mechanical equipment used for electrical control and power protection. With the advantage of easy installation and free maintenance, it can be used for long-term and reliable service. The H12-03B Disconnect switch consists of the isolator, rotary handle, moving contacts, fixed contacts, mounting base, knob cover, grounding bolt, pin lock nut, washers, motor protection switches and indicating switches. These parts work together to achieve the desired functions.The isolator in the H12-03B disconnect switch is the main controlling device. It is composed of an electromagnet and an insulation shell. When the switch is on, the strong magnetism between the two parts ensures the switch’s safety. The fixed contacts and moving contacts in the switch are made of high quality metals with outstanding performance. They work together to ensure the safe and reliable operation of the switch in any extreme environment.The rotary handle in the H12-03B disconnect switch is mainly responsible for controlling the opening and closing of the contacts. It is also designed to lock the handle to prevent accidental movement. The knob cover with indicator helps the customer to identify the specific equipment in different positions. The motor protection switch serves to automatically open the load in case of overcurrent or overvoltage. The indicating switches of H12-03B disconnect switch are optional items. It can be programmed to several operation modes according to customer\'s demands.The mounting base of the H12-03B disconnect switch has a universal layout, which makes it suitable for many occasions. The grounding bolt in the disconnect switch is used to fasten the switch on the wall. Additionally, the pins, pins and screws are designed for a convenient and reliable opening and closing of the switch.The H12-03B disconnect switch can be used in a variety of industrial applications, such as motors, AC, renewable energy, and commercial and residential buildings. It can provide reliable interruption of electric current in times of emergency, thus enabling a safe escape route. In addition, the switch provides easy installation and minimal maintenance, making it the most cost-effective solution for any industrial application.