Is It Necessary to Equip Extension Sockets with Overload Protectors? from buzai232's blog

Is It Necessary to Equip Extension Sockets with Overload Protectors?

As a necessity for everyday electricity use, extension sockets involve safety in use. Many countries have strict requirements for the structure and materials used in the local production or import of extension sockets. For example, the socket must be equipped with a childproof safety door. The cross-sectional area of the copper wire must be specified according to the length of the power cable. And the shell must be made of flame-retardant material in order to avoid fire. There is a component called an overload protector in the extension socket, which is also intended to ensure safety in use. There is no mandatory requirement for this part of the market to be configured, but if it is, the cost will rise. If you want to start importing extension sockets for sale in your market, then you should think about whether it needs to be equipped with an overload protector.Get more news about Overload Protection Socket,you can vist our website!

The function of an overload protector
To determine if an extension socket needs to come with an overload protector, you first need to know how overload protection works and a protective role in an extension socket.

An extension socket is a single socket power expansion equipment, a single power output port to expand into a multi-terminated power output hole, to meet the simultaneous use of a variety of household appliances' power supply. However, there is a limit to the amount of electrical power that can be loaded. For example, the total power of an electrical appliance marked as 13A, 250V~ cannot exceed 3250W (12A◊250V). Once the load capacity has been exceeded, it is easy to cause the charging equipment to fail or the wire temperature to rise and fire to occur. It is not always possible to calculate the total power of an electrical appliance, so overloading an extension socket is inevitable. To ensure safety, some of these sockets are equipped with overload protectors. When the load on the extension socket exceeds its rated maximum power, it will automatically cut off the power supply to protect electrical property and personal safety.
If this alone does not give you a sense of the effect of the overload protector on the extension socket, you can refer to the following experiment.

First, we use an extension socket that is 13A, 250V~, maximum load capacity of 3250W, without an overload protector, as sample No. 1. In the beginning, we connect 1500 watts of electric iron to sample NO.1, the sample reacts nothing. Then connect 1000 watts of electric rice cooker, extension socket and appliances are normal use. But when connected to a 1200 watts electric heaters and three electrical appliances work a few minutes later, we use a thermometer to measure the extension socket shell surface temperature. It turns out that the temperature is higher and higher. If you continue to plug in other high-power appliances, the temperature will rise rapidly.
Secondly, under the experimental situation, when flammable objects such as paper towels, sponges and cotton cloths are used to cover the extension socket, the temperature rise accelerates and can even reach the ignition point in a short time, giving rise to ignition hazards.

Finally, we use the same rated power of 3250W but with overload protection extension socket, the same in turn access to several appliances, 3 appliances at the same time power working about 5 seconds, the extension socket automatically powers off. Turn off the power switch, remove one of the appliances, wait for 5 minutes or so for the temperature of the extension socket to return to normal, reset the overload protector button, and then turn on the power switch, and the extension socket continues to supply power normally.