overvoltage protection devices on the network

main causes

The most common network Surge current 220 and 380 volts appears on the followingreasons:

1. Open neutral wire (on the scheme is referred to as N, blue).Purpose zero - align current in phases and, consequently, when the cliff there is a sharp crash, in which some consumers get less required 220, and some longer, up to 380 V. If the first case, the technique will simply not work, then the secondit simply fails, unless safety devices are installed.
2. Inattention by connecting contacts in the panel, resulting in his veins will overstrain - not 220, and 380 V. There was
3. surge voltage due to contact with thunderstorms in the transmission line (which is why recommend turning off all appliances during thunderstorms and lightning protection doLocation on).
4. Powered by one line with a powerful plant, which at some point could run all their equipment, creating a huge jump in the current network.There is rarely, but still sporadic cases.

As you can see, an overload in single phase and three-phase network is influenced by many factors, including natural.Therefore, home wiring it is necessary to protect, not to become a victim of an accident.

devices to solve

In today's world there are many different devices to protect against over-voltage in the network, which is easy to connect with your own hands.The products can effectively cope not only with the voltage fluctuations, but also from an overcurrent, which are also detrimental affect on the house wiring.

Among the most useful for use in the house and the apartment is isolated:

1. stabilizer .It is a kind of safety device, which monitors the mains voltage and in the event of the maximum permissible deviation disconnects electricity to the building.For example, on my experience I can tell that the stabilizer is not just to save our home appliances from surges caused by welding work, passing near.The products have a range of 150 V and 240 V (as an example).Once the value out of this range, the unit will turn off.At the same time, when all stabilizes protection device is switched on again.For information on how to connect a voltage regulator, we are told in the corresponding article!
2. relay .You certainly do not just faced with these devices, which are miniature versions of the stabilizer.Most often voltage relay used for overvoltage protection of one specific unit, for example, a computer.It works in the same way as the previous version.It may be in the form of an electric plug (for example, ZUBR) extension and a single unit (a well-known barrier), which is mounted on a DIN-rail panel.
   
   
3. protective devices .It is widely used to protect the network at home, due to the high quality of work and a small cost.RCD should be paired with a special sensor cash flow, which will provide a signal to shut off when it detects the over-voltage in the network.
4. Uninterruptible Power Supply .Again, from experience I will confirm its effectiveness.More than ten times the UPS saved my PC from off at a sharp activation of the stabilizer."Bespereboynik" is a small cost, so this option to buy the overvoltage protection in the presence of a PC is essential.

purchasing these devices for protection against over-voltage is 220 volts, you can not worry about that suffer appliances, wiring, and most importantly - your life is in danger.

Recommendations:

• How to connect Emergency circuit breakers
• Causes tripping RCDs
• What better put: Emergency circuit breakers or RCD