Emergency and abnormal modes

Short circuit. If jumper two wires conducting the current to the electric appliance, the current will increase sharply (10 times more). The increase in the current 10 times lead to an increase in the amount of heat wires 100 times. This posting will be destroyed and there will be a fire hazard. To avoid this, the network must be equipped with a device auto-off instant.

Overloading. The same danger of destruction, but for a longer time when there is excess current in excess of the allowed for the residential wiring. In this case it should be automatically disabled.

Voltage deviation. On the nameplate electrical device applied its rated voltage, ie the voltage, ensuring normal operation. Usually, it is 230 volts. When voltage deviations, both upwards and downwards interferes with the normal operation and shorten the service life of the appliance. With a significant voltage deviation may damage the appliance. If your apartment voltage is below 200, you need to use voltage regulators.

Voltage sags. This is a short-term increase voltage, which may reach hundreds and even thousands of volts. This high voltage can damage some home appliances. These include devices that are going from the smallest electronic components: computers, televisions, stereos, VCRs, etc.

There are several factors that cause "surges":

A lightning strike to the power line wires, or in close proximity to it.

Automatic switching operations (switching on and off of powerful electric motors and other industrial enterprises.).

Unplanned switch that has to perform in adverse conditions.

On the Protection of the "surge" will be discussed later.

"Skewed" voltage. This phenomenon consists in the fact that one part of the electrical voltage is under inflated, and the other - under the understated. "Skewed" stress occurs when a fault in the network 400/230 V. You can notice it by abnormal operation of your electrical appliances. Thus, lower power bulb glowing bright light, and the more power the lamps are lit, "dimly".

If the apartment is not disconnected network automatically, it must be immediately switched off manually.