The indispensable element of the modern world brings with it electrical energy, system and equipment faults. 7,750 As a result of the examination of electrical system failure, the most common cause of damage was observed to be temporary voltages with a 28 %ratio.

Temporary excessive voltages are the rise of the network voltage for a very short time, and the network voltage tends to return to the main sinus form. These short -term elevations in the voltage may occur due to atmospheric origin, depending on switching or interruption of error currents.

Excessive voltages caused by atmospheric events

The incredible strength of nature, lightning, every year the world causes more than 24,000 fires, $ 407 million material damage **.

The fall of the lightning currents with very high energy is the direct effect of the lightning blow, while part of the lightning current is damped in the soil, while the other part is included in the network. While these high -energy lightning blows are inevitable to cause material damage to the electrical system, they may also create a fire risk as a result of very severe overheating of the materials.

The indirect impact of the lightning current is a more frequently observed effect, the lightning blow is the result of the rise in tension in energy transmission lines with electromagnetic induction.

According to the Lightning Stream-Cumulative Ratio table in the IEC 62305-1 standard, 50 %of the lightning blows have a current exceeding 35KA and 5 %.

Excessive voltages due to switching

Electromagnetic induction is the potential difference (voltage) production on a conductor exposed to a changing area. The discovery was made in 1831 by Michael Faraday. Sudden current changes occur with the closure and opening of a high -power electrical load. As a result of sudden current change, voltage inducting occurs on the conductors in the near region according to the Faraday law. In daily life, we see this situation in general, inductive loads, engines, transformers in and out of the tension as a result of sudden current changes. Compared to excessive voltages caused by atmospheric events, excessive voltages due to switching are observed much more frequently with a ratio of 60-80 %, but create lower energy impacts.*

Voltage Protection Elements Parafudrlar

In increasingly widespread IoT and electronic devices, the trend of reaching smaller sizes brings more transistors to use. This means that the devices will become more sensitive to voltage increases. The protection of systems against sudden excessive voltage strokes is provided only by correct grounding, co -potential grounding and paraffudrlar.