Monthly Archives: August

urge Arresters are used to Limit the surge voltage much below the voltage impulse withstanding level of  the near by apparatus and to divert Lightning current. The function of the earth conductor is to provide a conducting path over which the surge current can be diverted around the apparatus being protected, without developing a   dangerous  

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L ightning have always been a fascinating natural phenomenon. However, they also present a risk for human and the environment that should not be underestimated. The task of a lightning protection system is to intercept lightning strikes, divert it towards the earth and distribute in the ground. The idea is to prevent thermal, mechanical, electrical

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Copper Coated Steel and Skin Effect Skin effect is  the  tendency  of  an  alternating  electric  current  (AC)  to  become  distributed within a conductor such that the current density is largest near the surface of the conductor, and decreases with greater depths in the conductor. The electric current flows mainly at the “skin” of the conductor,

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Earthing System is essential for any electrical installation to avoid dangers associated with fault currents and lightning strikes. A properly designed common earthing system is used for both electrical system and lightning protection system. An earthing system comprises of protective earthing conductor, equipotential bonding bars, connectors and earthing electrode. 1      A good earthing

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An ideal earthing system especially the earth electrodes shall  offer long  life almost equal  to the life of a building or at least 30 to 40 years. But often the system degrades and need maintenance, replacement or improvement. In general  maintenance  of  earthing LV D GLIÀFXOW WDVN IRU   WKH HQJLQHHU HVSHFLDOO\ LQ DQ industrial  and 

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Air Terminal in an external lightning protection systems can be divided into two categories, namely, conventional and non- conventional. The conventional systems use Franklin rods or mesh. Early Streamer Emission (ESE) and Dissipation Arrays (sometimes called Charge Transfer Systems – DAS / CTS ) are the non conventional air terminals. Many decades of experience shows

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Fire in buildings due to electrical short circuit is common from the day of invention of electricity. Statistics shows approximately 40 % fires in buildings are due to electrical reason such as short circuit in low voltage system. Result of these accidents are known. Electrical installation in industrial and commercial premises are physically inspected &

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Any one would expect a safety device like SPD- Surge protection Device to “fail safely” in case of any abnormalities above the SPD’s limit. Also, situations like Neutral cut or shift in a power supply system is not un- common. There were few incidences of SPD explosion & ÀUH DFFLGHQWV LQ ,QGLD. 1RZ, PDQXIDFWXUHUV RI

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SPD is a device designed to protect electrical circuitry from voltage spikes. SPD limits the over voltage in an electrical network by diverting, blocking or by shorting any unwanted voltages above a safe threshold. This limiting is voltage also known as let-through voltage, voltage protection Level, spark over voltage, clamping YROWDJH HWF., VSHFLÀHV WKH RYHU

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