1, look at the appearance
The speed switch panel should be made of high-grade plastic products, which looks like a uniform material and a smooth surface. The panel material is made of PC material (anti-ballistic rubber), which is excellent in flame retardancy, insulation and impact resistance, and the material is stable and not easy to change color. The use of switches and sockets made of such materials can greatly reduce the occurrence of fires and the like caused by circuit.
2, look at the internal structure
In the case of a speed control switch, a pure silver contact and a conductive sheet made of a silver-copper composite material should generally be used to prevent oxidation caused by the arc during opening and closing. The conductive bridge of the high-quality speed control switch panel is made of silver-nickel-copper composite material. The silver material has excellent electrical conductivity, and the silver-nickel alloy has a very strong ability to suppress arc. The switch adopts brass screw pressing line, the contact surface is large and good, the pressing force is strong, and the wiring is stable and reliable. The single-hole wiring copper column has a large wiring capacity and is not limited by the wire diameter.
3, security
When selecting a speed switch, try to choose a product with a protective door.
The speed switch panel should be made of high-grade plastic products, which looks like a uniform material and a smooth surface. The panel material is made of PC material (anti-ballistic rubber), which is excellent in flame retardancy, insulation and impact resistance, and the material is stable and not easy to change color. The use of switches and sockets made of such materials can greatly reduce the occurrence of fires and the like caused by circuit.
2, look at the internal structure
In the case of a speed control switch, a pure silver contact and a conductive sheet made of a silver-copper composite material should generally be used to prevent oxidation caused by the arc during opening and closing. The conductive bridge of the high-quality speed control switch panel is made of silver-nickel-copper composite material. The silver material has excellent electrical conductivity, and the silver-nickel alloy has a very strong ability to suppress arc. The switch adopts brass screw pressing line, the contact surface is large and good, the pressing force is strong, and the wiring is stable and reliable. The single-hole wiring copper column has a large wiring capacity and is not limited by the wire diameter.
3, security
When selecting a speed switch, try to choose a product with a protective door.
19V Dc Adapter,19Volt Ac Dc Adapter,Interchangeable Plug 19V 3.42A Adapter,19V 3.42A Adapter
ShenZhen Yinghuiyuan Electronics Co.,Ltd , https://www.yhypoweradapter.com