Extension cords are used to connect various devices. This is especially true for equipment that is located in inaccessible places. Consider carefully the modern surge protector, more about it will be discussed later in the article.
The concept
Surge Protector - a device that suppresses high-frequency noise and equalizes power surges. It can have three-phase sockets (380 V) for connecting powerful devices. The device protects power networks, as well as network, telephone and television lines.
The filter is used to protect computers, televisions, tablets, laptops, routers. It is not used for irons, microwave ovens, heaters. The surge protector can be of several types:
- Power strip extension filter. This option is optimal, as it includes the functions of 2 devices. The disadvantages include bulkiness and high cost compared to a standard extension cord.
- Filter into a power outlet. It does not have a cable, it is installed immediately into a power outlet. This device is compact, so it is ideal for travel.
- Filter on the coil. This device is equipped with a cable on a reel hidden in the device case. This is necessary to adjust the length of the cord depending on the situation. But because of the coil, the weight and dimensions increase. The filter has a long cable, it is used in professional work.
Appointment
The power strip is:
- Household. It has compact dimensions, a small number of outlets and a short cable.
- Office. It has many sockets and a long cord, which makes it bulky.
- Professional. It has a long cable and additional three-phase sockets.
A power strip for a computer is indispensable, as it ensures the smooth operation of equipment. With this device, the technician will function safely.
Input plug
A power strip may have different plugs:
- "Euro". The plug includes 2 contacts, considered the most popular option.
- Eurocompact. The flat plug has 2 pins. This outlet takes up little space.
- UPS The plug has 3 pins. For household outlets, the plug does not fit. Therefore, you should choose a filter with a UPS connector only when the UPS is connected to it.
Switch
A power strip with a switch is a convenient option, since it is more convenient to turn on / off with it than to do it from an outlet. The switch happens:
- Common. With it, all sockets are turned on.
- Individualized. It includes a specific outlet.
- Remote control. This function allows you to turn on and off sockets at a distance.
Length of cable
Common extensions include a length of 1.2; 1.5; 1.8; 3; four; 5 m. There are devices with a length of 10 m. It makes no sense to buy models with a very short cord - then it is advisable to use a tee or filter in the socket.
If the cable is long, the device may be further from the outlet. But too much length complicates the use and transportation of the device. Therefore, you need to choose an extension cord for a specific situation.
Number of Outlets
The number of outlets can be in the range of 1-8 pieces. With the increase of this parameter, the number of devices that can work with the device increases. When buying an extension cord, you need to consider the number of types of equipment that is commonly used.
For a PC, you need to choose a filter with 5 sockets or more, because you will need to connect a power supply, monitor, speakers, printer, scanner or router. Extension cords release with grounding and without it. For some you need grounding, for the rest - no. This part should be recognized in the instructions for the device.
Power
This indicator means the maximum power of devices at which the filter operates without overloads and overheating. The more outlets, the higher the power of the extension cord. For the right choice, you need to add the power of the devices and add 20-30% of the margin. This indicator is indicated in the instructions.
Power happens:
- Active (watts, watts). For devices with active load. Such filters are used for TVs.
- Full (VA, volt-ampere). For equipment with capacitors, inductors. Extension cords are chosen for power tools and refrigerators.
Protection
Surge protectors are divided into protection levels:
- Basic. Budget filter for low-cost technology.
- Advanced. The filter is universal and affordable.
- Professional. An extension cord is used for expensive and sensitive equipment.
Equipment
A power strip with a USB port is used to connect devices, such as phones, tablets. It turns out that you can work with devices, charge their battery, without occupying the outlet. Some extension cords have telephone jacks that are used to connect a telephone line to the line filter.
Most filters are equipped with operation indicators - bulbs. They report whether an extension cord is included. A useful feature is the presence of protective curtains that protect the sockets from the ingress of dust and other objects.
You need to buy only high-quality filters and with a guarantee. It is desirable that her term be 5 years. You should not choose a filter with contacts made of cheap metals, they overheat and cause ignition of the housing. Quality devices are made from non-ferrous metals. The extension casing must be fireproof. A suitable extension cord extends the life of the equipment.