The protection level of electrical equipment is represented by IPXX, where the first X indicates the dustproof level and the second X indicates the waterproof level.
The dustproof level ranges from 0 to 6, with 0 indicating no protection; the waterproof level ranges from 0 to 8, with 0 indicating no protection.
For example, IP21 means protection against solid foreign objects with a diameter of 12.5mm or more and protection against vertically falling water droplets.
In general, there are two types of current protection and voltage protection.
Current protection includes: overload, overcurrent, quick-break, etc.; voltage protection includes overvoltage, undervoltage, grounding, lack of phase, etc.
Category 0. This type of equipment relies solely on basic insulation to prevent electric shock. Class 0 equipment has no grounding terminals on the enclosure or on the dead conductors inside.
0 Category 1. This equipment also relies on basic insulation to prevent electric shock. However, the metal casing of this equipment is equipped with a ground (zero) terminal and does not provide a power cord with a protected core.
Category I. In addition to relying on basic insulation, this equipment has an additional safety measure. There is no grounding terminal on the casing of Class I equipment, but there is a grounding terminal inside, and the power cord with a protective plug is led out from the equipment.
Category I. This equipment has double insulation and reinforced insulation safety protection measures.
Class II. This device relies on ultra-low safety voltage to prevent electric shock.
Extended information:
The technical content specified in the enclosure protection level (IP code) is mandatory, and the equipment enclosure quality standards must meet the design requirements and relevant national, industry and other standards. Before ordering equipment, the supplier's production inspection capabilities and test equipment must be carefully reviewed. Similar goods supplied by the supplier must pass the national authoritative third-party enclosure protection level inspection agency and obtain relevant inspection or certification certificates, so as to select a qualified equipment supplier.
Before the equipment leaves the factory, in view of the limited ability to inspect the shell protection level at the construction site, pre-factory inspection of goods can be organized and the incoming inspection gate can be moved forward. Tests conducted in accordance with regulations must be witnessed and confirmed by personnel standing by. Only when all inspection items, including the equipment shell protection level test, are qualified can it be packaged and shipped.
Baidu Encyclopedia-Electrical Protection Shell