Proper selection of network filter

Filtering does not need a bazaar, and electricity

The life of each of us is filled with outstanding zigzags and untimely electrotechnical discoveries. Especially when faced with mysterious interference, supernatural failures and fatal mistakes in the work of complex and sensitive computer, communications or consumer equipment. Yes, and there are such "surprises" at the most inopportune moment ...

The novelty of the movie is catastrophically overlooked! The final fateful game is interrupted at the most global episode! Urgent business and responsible work fell into an indecently thoughtful stupor! And pay attention to the microwave, in the belly of which is a tasty morsel of a semi-finished pizza that has not been served to condition, slyly gleams with an appetizing frost crust ... Familiar situation?

We will not touch the unpredictability of the consequences of a short circuit here - it has long been known even to scouts and amateurs. But if the result is a breakdown of an expensive electronic device or - God forbid! - the flame of a fire, even the proven effect of the most careful biting of elbows will hardly help here. Open the secret: a radical solution that can curb the lack of control of the current in the wires, has already been found! It attracts with its simplicity and optimality - the purchase and use of a network filter.

In order for the operation of the stabilizing element to be reliable and efficient, you need to take into account not only the reputation of its manufacturer, but also several important characteristics. With the seeming simplicity of a single compensation scheme for all devices of this category, some models have differences that fundamentally affect their capabilities, quality and cost. But each parameter should be chosen strictly individually and very carefully.

What level of protection do you want to provide?

The characteristic is the most significant and indicates the ability of the stabilizer to absorb bursts of electricity. Depending on the type of device, its range of efficiency is also determined: for basic models - from 0.4 kJ, for professional models - at least 2.5 kJ. It is the level of protection that affects the degree of safety and operability of the device. On this basis, the mains voltage filters are divided into 3 classes:

  • Essential - The standard basic version used to connect low-power household appliances.
  • Note /Office - high-quality and multifunctional solution for complex use under medium load conditions.
  • Performance - models that organize professional and comprehensive protection for all types of highly sensitive and expensive equipment.

What should be the maximum allowable load?

The value of this criterion is equally important for reliable performance of network filters. Its nominal value is very simple to learn: it is indicated in kW on the enclosures of the products. The higher the power indicator, the lower the probability of emergency failures in the operation of equipment and power outages during overloads. For standard household conditions, a characteristic of 2.2 kW (current - 10 A) will be sufficient.

How many sockets are needed?

Proper selection of a network filter is impossible without a certain number of connected equipment. How annoying it will be after the purchase to miss one or even several of the desired outlets. Where now to power the printer ?! Modern models of the device have from 1 to 8 connectors, so simple and competent arithmetic, anticipating its acquisition, will provide the required plug location for all your electronic assistants.


To this category you can approach, guided by the planned budget, the appropriateness of a particular function, personal preferences and conditions. Want to get a versatile and expensive network filter? Then stock up on money and pay attention to the following options and options:

  • Protection of telephone and cable communications, computer networks;
  • Cord length (1-8 m);
  • Master socket, timer, status indicator light;
  • The number and types of fuses;
  • Warranty period (at least 3 years);
  • A sufficient gap between sockets, clamps for wires;
  • Design (for aesthetes!).

Clearly, such lists of popularity are rather subjective, but they are still capable of setting the main direction. Moreover, network filters are represented on the market by numerous manufacturers, model lines and price categories. The following brands are recognized as the most reliable in terms of fire safety standards, protection against short circuits and interference: APC, Zis and Pilot pro.

Having stopped the choice on products from these producers, you will find the wide range, the guaranteed quality, the varied cost. The final decision will depend solely on the network filter characteristics required for your equipment and individual financial courage.


Many consumers tend to step on the rake of their hapless friends and acquaintances of the “experts” with enviable consistency. Therefore, when buying a reliable network filter, you should not go on about the opinions of the Ivanov spouses. You have your own, strictly individual conditions, and no one has yet canceled the criteria for a reliable choice. The tips here are simple:

  1. Try not to confuse the stabilizer with a regular extension. Such a "filter" will not solve the problem, but only lull your vigilance.
  2. Carefully study the characteristics of the product and the instructions attached to it. The discrepancy between the real parameters of the passport data indicates a doubtful quality. You will spend your money for nothing!
  3. All contacts in the device must be from non-ferrous metal. Terminals made of ordinary steel guarantee overheating and rapid breakdown of the device - a factor that can even lead to fire.

And remember that the serial connection of network filters to each other is contraindicated!

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