Haier has launched an internationally advanced electric water heater with "anti-electricity wall", which has taken the lead in solving the environmental safety problems that have long restricted the development of the industry, such as "live ground wire", "live power socket" and "live water pipe", and may become new norms or standards in the industry. According to industry standards and market orientation, the industrial structure of the electric water heater industry will be optimized and adjusted.
The main measures for electric water heaters to prevent electric shock are:
1. In order to prevent electric shock, all live parts are insulated to avoid accidental contact between people and live parts. All live parts are insulated accordingly, so that people can't touch them easily.
2. Ensure good insulation and electrical strength between the live parts and the shell, and between the live parts and the easily accessible conductive parts, select qualified electrical parts and conduct strict tests. For example, each electric water heater must pass relevant tests such as edge resistance, electrical strength and leakage current before leaving the factory.
3. Grounding protection: Grounding the conductive part that is easy to touch, so that even if it leaks electricity, it will not cause harm to people.
4. Leakage protector: This is a common accessory for general electric water heaters. Its principle is to judge the power supply current through the zero-sequence current transformer, so that the outflow current is equal to the inflow current during normal operation, otherwise it is leakage, and its tripping mechanism will automatically cut off the power supply of the electric water heater, thus preventing electric shock.
Extended data:
Haier water heater with anti-electric wall can be equipped with no grounding wire, and the electric appliance with anti-electric wall is a kind of protection for users. The difference between true and false electricity-proof walls is as follows.
1, the real electricity-proof wall must have a patent number, and those without a patent number are fake electricity-proof walls;
2. The real electricity-proof wall is a green logo, which is directly embedded in the fuselage, not gray or pasted; Other colors or those not embedded in the machine are fake anti-electricity walls;
3. There is no leakage protector on the real electricity-proof wall, and the leakage protectors are all fake electricity-proof walls;
4. The real electricity-proof wall can be electrified to take a bath. Haier's electricity-proof wall has triple protection: external electricity-proof design, internal electricity-proof design and pipeline electricity-proof design. It is the third generation of electricity-proof wall technology, and all those who can't take a bath with electricity are fake electricity-proof walls;
The real electricity-proof wall can be installed without grounding wire, and you don't need to buy any external equipment. You can install it directly by buying a water heater. It is necessary to buy a separate "resistor" to install a fake electricity-proof wall where there is no ground wire;
6. The real electricity-proof wall can provide safety warning. If the refrigerator, washing machine and other electrical appliances in the user's home are accidentally charged, we can call the police. Those who don't call the police are fake electric walls;
7. The real electricity barrier will trip the electric meter. When the power of wires in users' homes is too high, which threatens the safety of users' electricity consumption, Haier's electricity-proof wall can not only give an alarm, but also trip the meters in users' homes because of too high power. What can't be done is a fake electricity-proof wall.
Baidu encyclopedia-Haier electric wall water heater