The two or three level socket refers to the socket with a higher level of safety protection. Among them, the first level socket is the most basic socket, usually only two-pronged plug and line protection, security is relatively low; while the second level socket is added such as overload protection, leakage protection and other security measures, more safe and reliable; third level socket in the second level on the basis of the addition of more protection measures against electromagnetic interference, especially suitable for occasions that require high-quality power protection.
Three-level socket is mainly used in electrical equipment more sensitive, highly valuable, high-power need to protect the occasion, such as medical equipment, classified equipment, computer equipment, precision machinery. Such equipment on the high power requirements, the need for more stringent security protection, so the two or three sockets become a necessary guarantee of their safe and reliable operation.
When using a two or three-stage socket, you first need to make sure that the specifications of the plug and socket are matched, and that the safety pins are not inserted incorrectly or jammed, resulting in short circuits, leakage and other problems. In addition, you need to regularly test the socket protection device is intact, such as leakage protection in the specified time action, etc., found that the problem should be replaced or repaired in a timely manner. Finally, the use of two or three levels of socket also need to pay attention to the environment of electricity, to avoid the socket installed in the wet or susceptible places, so as not to affect the service life of the socket.