Why do you need a surge protector and how to choose it correctly for household appliances, and can it be used without grounding?

Expert: Evgeny Mikhailovich Obolensky

*Review of the best according to the editors of expertology.ru. About the selection criteria. This material is subjective in nature, does not constitute advertising and does not serve as a purchase guide. Before purchasing, consultation with a specialist is required.

The modern Russian citizen has a large number of different home appliances. Therefore, it is not surprising that in a large family a free electrical outlet becomes scarce in the evening. In addition, residents in remote settlements often suffer from power surges. Sensitive devices fail, unsettling their owner. Simple but effective surge protectors help you take control of the situation. Some consumers call the device an extension cord with a button. But when choosing a splitter block, it is important to consider the length of the wire and the number of sockets. A few useful tips from experts will help you find the most suitable surge protector on the market.

How to choose a surge protector

1. Wire length
   . There are extension cords on sale with a power cord length of 1 to 50 m. You should not chase a long length; in a cramped apartment, a device with a cord of 1.5-2.0 m will be enough to connect a computer, printer and telephone. But when the electrical outlet is located away from the equipment, then the choice is made in favor of extended versions (10-50 m).
2. 220 V sockets
   . Before going to the store, you need to calculate how many electricity consumers will be simultaneously connected to the surge protector. To the amount received you should add 1-2 spare sockets. If you are using a pad for charging smartphones or a power bank, it is better to take a closer look at models with USB ports.
3. USB ports
   . The presence of USB connectors allows you to make the surge protector more compact. The ports differ in their rated current. Most often, 1.0-2.0 A is allocated to one connector, but it is worth paying attention to the maximum total current level. Sometimes when connecting several gadgets, the power on each connector drops sharply.
4. Protection systems
   . A surge protector is not only an extension cord and a splitter, but also a reliable assistant in the fight against voltage surges. Many models are capable of protecting devices from short circuit (short circuit), overheating, exceeding the maximum load, and high-frequency interference. A very useful option if there are small children in the house would be to protect sockets with special curtains. If you plan to take the surge protector outside, then it is better to give preference to products with a waterproof design.
5. Power
   . Each surge protector has a limit on the total power consumed by connected devices. It ranges from 2.0-3.0 kW. Exceeding the threshold specified in the passport will, at best, trigger the automatic fuse. Therefore, experts recommend caution when connecting powerful electrical appliances, such as heaters, irons, kettles or washing machines, to the block.
6. Equipment
   . Surge protectors have different equipment, ranging from regular sockets to the control option via Wi-Fi. The simplest devices, consisting of a wire, sockets and a switch, are suitable for those users who are looking for an extension cord. Modern users require not only power outlets, but also USB ports, battery slots, and reliable protection for all connected devices. And the most advanced users choose network filters that can be controlled via the Internet.

Our review includes the 15 best surge protectors. All of them have been tested in our country and received positive ratings from experts and users.

FAQ

How necessary is a surge protector for a home computer? So much so that without it it is better not to turn on the computer at all. A power surge or short circuit can turn an expensive appliance into a pumpkin. This is exactly what the surge protector protects against.

What parameters does a surge protector require for a refrigerator? The refrigerator does not need a surge protector; it is advisable to connect it directly to the outlet.

Can a surge protector protect an outlet from a short circuit in the device? That's what surge protectors exist for. Most of them are equipped with short circuit protection.

What is better: stabilizer or surge protector?

Device Features

A surge protector is understood as a device for protecting household and office equipment from various electrical interference and overload. Consists of a plastic case with several sockets, a power cable and a plug. The surge protector extension cord is equipped with special boards with protection elements. It is used to connect one or more household or office appliances.

The device is used to protect:

• from pulse/high-frequency/low-frequency interference;
• from short circuit;
• from overcurrent.

High-quality devices use several lines of defense. Varistors are used against pulsed short-term interference; gas dischargers are often paired with them to enhance the response. LC filters are used to filter out high-frequency interference. To reduce the load on the internal systems of devices and ensure stable operation, the network device is equipped with a capacitor and inductors. A terroidal balancing choke and inductors are also used to reduce the voltage.

There are several types of extension filters:

• Essential is the simplest entry-level device, notable for its low price and simple features;
• Home/Office – to protect computer and home equipment;
• Performance – has a high degree of protection, designed for professional equipment.

Rating of the best network filters

ORICO HPC-8A5U-BK

A surge protector with a double-row arrangement of sockets and an increased rated current is suitable for connecting both powerful devices such as a coffee machine or gaming machine, as well as many low-power consumers - a computer, peripherals and a TV. 16-amp filters are often used to service energy-consuming equipment in server rooms.

The location of the USB ports at the end of the device allows you to conveniently organize the charging base without interfering with the connection of power plugs. Implemented support for intelligent device recognition (Intelligent IC) and fast charging.

When all 5 USB ports are connected, the total current will be only 8 A (40 W).

The best classic surge protectors

Traditional surge protectors are a simple device consisting of a wire, outlets and a switch. Some models have a power button for each socket, which is convenient when using devices with different operating hours. Experts have selected several reliable devices.

APC by Schneider Electric P43B-RS, 4 sockets 1 m/w

Rating: 4.9

The surge protector from a well-known brand is equipped with four sockets and a meter of wire. At the entrance there is a general switch with LED backlight. The black case is less easily soiled and retains its attractive appearance longer. Grounding will protect the user from electric shock due to a short circuit. There are holes at the bottom of the case for wall mounting. The maximum energy absorption by the filter is possible up to 918 J, which is one of the highest values. In the reviews, buyers are satisfied with the high-quality assembly, durable plastic and rigid fixation of the plug in the surge protector. Owners also note the absence of an unpleasant odor, which usually occurs with similar products from a lower price category.

The classic type surge protector is notable for the presence of durable built-in curtains. They cover openings with current-carrying parts, increasing safety. When the plug is turned on, the user overcomes the resistance with force, and the connector can be inserted with one hand.

Advantages

• light indication on the body;
• compact dimensions 56x40x276 mm;
• not easily soiled color;
• grounding is provided;
• built-in curtains.

Flaws

• The plug is difficult to remove.

Defender DFS 501

A Chinese-made surge protector with 6 sockets, one of which is located for easy connection of massive plugs of charging adapters without blocking other sockets.

The USB port produces only 1 A, which is only enough to power an ordinary phone, and not a powerful smartphone, tablet or other device with a capacious battery.

The curtains covering the sockets are very tight. Therefore, when faced with the need to frequently insert and remove plugs, many users simply removed or broke off the protection.

The best surge protectors with USB ports

More and more domestic consumers prefer to buy surge protectors with USB ports. They allow you to connect smartphones, laptops and other gadgets without the plug looking bulky. Experts liked the following models.

Oehlbach Power Socket 905 1.5 m

Rating: 4.9

The Oehlbach Power Socket 905 surge protector is an example of reliability and safety. The product is manufactured in accordance with the most stringent requirements of international standards. The German manufacturer offers a power supply with 8 grounded sockets. They are turned on by one round shaped switch. To connect smartphones or tablets, there are two USB ports. They are also controlled by a common switch. The reliability of the contacts is ensured by gold plating (24 carats), which affects the cost of the filter.

Experts conducted a series of tests and were convinced of effective protection against various negative manifestations in the electrical network. In the event of a power surge, the filter disconnects all consumers from the network, and is turned on by pressing the Reset button.

Advantages

• German quality;
• reliable protection against overloads and surges;
• 8 sockets and 2 USB ports;
• gold plated contacts.

Flaws

• high price.

APC PM6U-RS

Rating: 4.8

To get into the top three ratings, the APC PM6U-RS surge protector required several factors. First of all, experts approved the thoughtful protection of all consumers from various types of interference. The device allows you to connect 6 devices. Three sockets are located on the top panel, and the same number are installed on the side. Additionally, there are 2 USB ports for charging gadgets. The model is designed for a maximum load of up to 2.3 kW and a current of up to 10 A. Thanks to the high maximum pulse interference current (24,000 A), the device can be used as a voltage stabilizer.

Users are satisfied with the quality of workmanship, thoughtful design and reliability. The disadvantages include the lack of separate switches and the high price.

Advantages

• convenient design;
• performance indicators;
• excellent current stabilization;
• 60 months warranty.

Flaws

• high price;
• inaccurate operation of indicators.

LDNIO SE6403, 6 sockets, 2 m, s/z 2500 W

Rating: 4.7

Another popular network filter is LDNIO SE6403, designed for a total load of up to 2.5 kW. This allows you to connect not only tabletop appliances to it, but also an iron or heater. Six sockets in the network device are arranged in pairs, so the design is compact and convenient. The USB ports are placed on the edge so that they can be easily accessed when all the sockets are occupied by plugs. Two meters of cable extends the filter location from the base outlet. The bright indication on the switch is clearly visible even during the day. It is easy to understand from it whether power is being supplied or the splitter is de-energized. In reviews, the surge protector is noted for the presence of disc shutter plugs that prevent a child from accidentally plugging a foreign object into the socket. The owners are also pleased that each port produces 3.4 A, which allows them to charge the phone faster.

The network model stands out for its functionality. It has 6 standard outlets that allow you to power your computer, printer, desk lamp, heater or air conditioner. In addition, there are 4 USB ports for recharging phones, tablets, razors and other gadgets with batteries.

Advantages

• long wire 2 m;
• four USB ports;
• designed for power 2500 W;
• bright light indication;
• built-in curtains in each outlet.

Flaws

• thin wires inside;
• glides on a smooth surface;
• there is no relay inside.

Xiaomi Mi Power Strip 3 sockets / 3 USB

Rating: 4.7

High quality workmanship and an affordable price were the key factors for including the Xiaomi Mi Power Strip 3 sockets / 3 USB surge protector in our rating. The manufacturer took care of the durability of the device; when creating the model, the solid casting technique and a special type of bronze were used. The extension cord is designed for a maximum power of 2.5 kW and a current of up to 10 A. Overload protection is provided by a reusable fuse. The filter has 3 universal sockets and 3 USB ports. The maximum total current in USB connectors is 3.1 A.

Domestic users liked the design of the Chinese device, its functionality, power and reliable fire protection. Only a short cord (1.8 m) and a bright glow of the general power button irritate owners.

Advantages

• fast charging of gadgets;
• versatility;
• functionality;
• quality production.

Flaws

• short cord;
• no grounding.

Defender DFS 501 2 m

Rating: 4.6

The Defender DFS 501 surge protector is designed in the form of a traditional block, in which all sockets are located on the same row. Of these, 6 sockets with grounding and 2 USB ports. Each port is powered by a current of 1 A. The device is turned on by a common switch with light indication. The model is designed for a maximum power level of 2.2 kW at a current of 10 A. A protection status indicator is installed next to the switch. The filter protects household electrical appliances from short circuits and overloads, as well as from high-frequency interference. The manufacturer has equipped its product with a 2-meter cable.

Many users are satisfied with the combination of affordable price, appearance and number of outlets. But some shortcomings did not allow the model to take a higher place in the ranking. These are tight curtains and soft plastic housing.

Advantages

• many sockets;
• decent design;
• affordable price;
• recessed power button.

Flaws

• tight curtains;
• soft plastic.

ERA USF-5es-USB-W

An inexpensive device from a Russian brand, made in China. Has minimal functionality. There are no protective curtains, so this model should be kept away from children.

According to user reviews, the USB outputs are located too close to the power button, so when connecting wires, the power may accidentally turn off. Another disadvantage is the minimum cord length – 1.5 m.

The best surge protectors with interesting features

Network filters can have the most unexpected capabilities. Some devices allow you to charge not only mobile phones, but also AA batteries. Other models have a certain intelligence and can be controlled remotely. The following inventions have different advantages.

CROWN MICRO CMPS-10, 10 sockets, 1.8 m, s/z 3680 W

Rating: 4.9

The multifunctional surge protector is notable for the presence of 10 sockets where you can connect a lot of household appliances or office devices. In addition, it has two USB ports, so you can charge your smartphone or tablet separately. All openings in sockets are covered with protective curtains. The presence of numerous sockets is not a marketing ploy, since the permitted load is 3680 W. The network device has a ground connection and holes for wall mounting. According to reviews, customers like the presence of informational stickers indicating USB current. Also here, the sockets are not symmetrically located, which allows you to use all sockets even with L-shaped plugs (their “tails” will not rest against each other).

Other interesting features of the network device include an RJ-11 port, which provides telephone line protection. The filter also has a BMC port for coaxial cable, protecting the television antenna.

Advantages

• there are grooves for fixing to the wall;
• network cable 1.8 m;
• 10 classic sockets;
• Load up to 3680 W is allowed.

Flaws

• quite large dimensions 165x80x420 mm;
• weighs more than a kilogram;
• high price.

Xiaomi Mi Power Strip Quick Charger 2.0

Rating: 4.8

The smartest in our rating was the Xiaomi Mi Power Strip Quick Charger 2.0 surge protector. The user can control its operation remotely from home thanks to the built-in Wi-Fi module. There are 3 sockets without grounding and 3 sockets for an international plug in two rows on the case. The device can operate according to a configured schedule, keep track of energy consumption, and turn on and off using a timer. The sockets are equipped with protective curtains, which is especially important for families with small children. The filter is able to protect household electrical appliances from short circuits, voltage surges, overloads, thunderstorms and overheating. At the same time, the cost of a smart device is quite affordable.

Experts note the electronic power button and the presence of two indicators. The model becomes the winner of our rating.

Advantages

• control via the Internet;
• timer;
• work according to schedule;
• reasonable price.

Flaws

• short cord (1.8 m).

APC PMF83VT-RS 3 m

Rating: 4.7

An excellent universal surge protector for the home can be the APC PMF83VT-RS model. This device has 8 sockets, which have a compact arrangement (4x2 circuit at an angle of 90 degrees). The manufacturer has implemented several protective bundles that can protect not only your computer, but also your TV and phone. There are two sockets each for connecting a home phone and a TV (input and output). Experts highly appreciated the excellent parameters of energy absorption and smoothing of peak loads. Three light indicators located next to the general switch will allow you to monitor the operation of all protection systems.

Users in reviews speak flatteringly about the versatility of the device, long cable (3 m), and light indication. The disadvantages include the high price.

Advantages

• high-quality assembly;
• protection of various home appliances;
• informative indicators;
• compactness.

Flaws

• high price.

Universal U10-026 IP-44 PVS 3×1.5 10 m

Rating: 4.5

Extension cord Universal U10-026 IP-44 PVS 3×1.5 is designed for connecting various equipment in open areas. The model is made in a moisture-resistant design, all sockets are covered with protective covers. The surge protector stands out among competitors with its high maximum power (3.5 kW), rated current (16 A) and wire length (10 m). The block has 5 grounded sockets, which are turned on by one common button with light indication. The power and reliability of the product is provided by a three-core copper wire with a cross-section of each wire of 1.5 square meters. mm.

The extension cord takes fourth place in the rating for its quality factor and affordable price. The disadvantages of the domestic product include modest protection against electrical faults.

Advantages

• long wire;
• protection from moisture and dust;
• quality materials;
• acceptable price.

Flaws

• few levels of protection.

APC by Schneider Electric PM8-RS

Rating: 4.5

The original design was developed by American engineers. The APC by Schneider Electric PM8-RS surge protector has 8 sockets, they are divided into 2 groups of 4 pcs. These groups are located at an angle of 90 degrees, which made the device more compact. There is free space between the sockets, making it quite convenient to connect devices. There are three indicators next to the general switch. One of them signals surge protection, another controls grounding, and the third turns on when overloaded.

The model takes a worthy place in the ranking due to positive consumer reviews. They note the ease of use and the presence of useful indicators. There are no comments about the build quality.

Advantages

• high-quality assembly;
• universal connection;
• ease of connecting devices;
• 5 year warranty.

Flaws

• unreliable mount for wall mounting.

MOST Tandem TRG (black, 2 m)

A Russian-made model with the largest number of sockets among all the devices under consideration. However, the rated current of only 10 A imposes significant limitations on its full load.

The MOST Tandem TRG model has an original design. It is possible to mount it on a wall or other surface. Two autonomous blocks of three standard European sockets with grounding and two narrow ones without grounding. Each block is equipped with its own switch.

According to user reviews, this model is distinguished by good quality plastic and assembly. However, judging by the photo of the disassembled device, the soldering of the wires inside is not the best.

The best smart surge protectors

Smart surge protectors can be integrated into smart electronic home control systems to make your life easier. They will help you start your air conditioner, humidifier, boiler and other equipment at the right time. Here are the best options available for purchase in the Russian Federation.

Rubetek RE-3310 with Wi-Fi, 3 sockets, 1.8 m, 10A / 2500 W

Rating: 4.9

The category is headed by a network smart filter with Wi-Fi, which supports control of connected devices according to a given scenario. The list of actions can be set for the entire filter or for each socket separately. Thanks to a wireless network, you can turn on sockets remotely, starting the necessary devices at will. The total load on the filter is permissible up to 2.5 kW, so it can even withstand an iron. Three classic sockets and 4 USB are convenient for connecting different gadgets. The PVS wire is very flexible and its length of 1.8 m is often enough to access different consumers without an additional extension cord.

The main feature of the smart network filter is voice control. You can set commands to turn on appliances in the house and it will sequentially start the selected equipment. The network device works with the Rubetek and Yandex Smart Home systems. From the reviews it is clear that pairing is simple and each 220 V socket can be assigned a separate name.

Advantages

• built-in overload and short circuit protection;
• supports voice control;
• each 220 V outlet is assigned a separate name;
• There is a separate application for “manual” control.

Flaws

• USB are all turned on at the same time and cannot be adjusted individually.

HIPER IoT PS34, 3 sockets, s/w, 10A / 2500 W

Rating: 4.8

The global brand Hiper offers a smart network filter with 4 USB and 3 220 V sockets, which works via Wi-Fi via an application. In the settings, you can set a schedule or manually control the voltage supply to each outlet. All sockets have reliable protective shutters and are grounded. The device is designed for a total power of 2500 W, and if it is exceeded, an emergency shutdown will trigger, so there will be no fire. The white switch on the case allows you to mechanically de-energize the filter if necessary or in the event of a hacker breaking into the smart home system.

This is a universal network filter that is compatible with all common smart systems. It can be integrated into Google Home or Yandex Smart Home. If you are just assembling components (peripheral devices), but have not yet decided which system you will use, take this filter - it will fit any.

Advantages

• there is overload protection;
• blocks short circuit;
• universal for connecting to various smart control systems;
• intuitive application.

Flaws

• high price.

DIGMA DiPlug Strip 40, 4 sockets

Rating: 4.7

The category is completed by a smart network filter from Digma, which has four 220 V sockets and 4 for charging various devices via USB. The elongated case can be mounted on the wall using 4 holes in the back cover. Classic white color looks equally good both in the office and at home. The product has a 1 year warranty. The device connects to Wi-Fi and is controlled remotely via an application with intuitive settings.

We have identified this network model as the best in terms of price and quality ratio. It costs 500-1000 rubles cheaper than its competitors, but is in no way inferior in characteristics. Another advantage of the filter is its compatibility with the Mail.ru smart home.

Advantages

• Wi-Fi communication protocol;
• works even with not very common systems;
• 4 USB ports;
• more affordable price.

Flaws

• Doesn't work with Google Home.

Pilot L (white, 1.8 m)

Surge protector with five European sockets and one “old” type without grounding. Pilot is one of the oldest and most popular brands of electrical protection equipment, which has a high rating.

The design is familiar to this company - the sockets are located close to each other in one row. Good quality plastic body.

The blue neon light built into the button fades over time. The operation of the device can only be understood by the protection status indicator. There are no curtains, so it is necessary to install the device in a place where children cannot reach it.

Why is all this needed?

Only in an ideal world, the current in an electrical outlet has only two states: it is present or it is not. In reality, the “behavior” of electrical power has an “analog” unpredictable nature, unpleasantly surprising every time you least expect it.

There are many reasons why "line power" can deviate from the norm and even go beyond standard deviations. Thus, the evening voltage in the network - when there is a kettle, TV or computer on in every socket in every apartment - differs significantly from the voltage at night or during the day with minimal load.

Another example: a citizen has connected an industrial welding machine to his home network, and all the neighbors in the entrance or house enjoy impulse noise in the form of stripes on the screens and crackling sounds in the acoustics.

In most cases, a decrease in power quality is unpredictable and inevitable due to the external nature of the source - such as pulsed power surges during a thunderstorm. Sometimes the problem is very well known - for example, a powerful hairdryer, kettle or antique refrigerator periodically sends out “electrical hiccups” along the flimsy home or office electrical wiring, which is beyond our power to get rid of, although in some cases the issue is solved by simply tightening the contacts along the entire path.

The list of possible sources of electrical problems goes on and on. But whether it’s sparking contacts in the entrance or regular changes at the substation, the result is the same for the owner of equipment that “suddenly” burned out and was not covered by warranty.

Tips and tricks for a successful choice

When purchasing a surge protector or extension cord, you must first of all pay attention to the material from which the housing is made. Preference should be given to products made of hard plastic with tight “seams”. In this case, dust and moisture will not get inside and damage the contacts.

Here are a few more points that are also important:

• Manufacturer . You should not skimp on the brand - this is a guarantee of the quality and durability of the device. Before purchasing, be sure to read owner reviews.
• Power . The indicator directly depends on the number of sockets: the more there are, the higher the power figure. To calculate the required indicator, you need to sum up the power of all devices that will be connected to the filter or extension cord in the future, and add another 20-30%. Active power is indicated in the technical specifications and is measured in watts.
• Guarantee . The minimum warranty period should be 3 years; for branded models it reaches 5 years.
• Cable section. The larger the cross-section, the more current it will be possible to transfer from the network to consumers without overheating.

What a surge protector cable should be like for a computer, read the article: How to connect a monitor to a laptop - 3 main connectors and sequence of actions

To buy a good surge protector or extension cord with 100% compatibility with the device, you need not only to understand what it is, but also to clearly understand the purpose of each device, its functions and capabilities. In this case, you will be able to avoid mistakes and unnecessary expenses for equipment repairs.

Degree of protection

What is the degree of protection? A classifier that determines how safe an electromechanical device is in practice. How protected from external influences: moisture, dust, solid particles, accidental penetration.

By the way! The degree of protection is an important parameter. It depends on where you can use the purchased extension cord. Only at home, in a dry room or even in damp, very dusty areas.

The most common electrical extension cords on sale are the following degrees of protection:

• IP20 - equipped with open type sockets. Designed for use inside residential buildings, offices, and industrial premises. Wherever there is no high humidity, there is little dust.
• IP44 - with a waterproof, unbreakable housing. Sockets with moisture- and dust-proof covers. They can also be used indoors, but the main purpose is dusty, damp buildings and rooms. Also suitable for outdoor use.

What degrees of protection are there: