How to protect grounding from lightning strikes?

You need the products of surge arrester for it. Lightning protection grounding includes two concepts. One is lightning protection, which prevents equipment damage caused by direct lightning strikes. Second, electrostatic grounding, let electrostatic go into the underground, this will ensure the normal work of electrical equipment and personal safety. The grounding device is composed of …

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Characteristic of porcelain insulator

There are many types of porcelain insulators. We can produce them according to IEC standard, BS standard, DIN standard, etc. Butterfly and pin porcelain insulators are mainly used in high and low voltage transmission lines, while suspension insulators are used in high voltage transmission lines. Porcelain insulators/ Ceramic insulators are a special insulation control, which …

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What are the advantages and disadvantages of a single break isolator over a double break isolator?

Double end break switches similar to this switch: There are the following advantages over single end break switches: Improved swing arm stability for the higher voltage switches over 300 kV. Since the switch blade pivots in the center and breaks at both ends, the horizontal rotation is inherently more stable with regard to mechanical vibration.Improved …

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TEST SWITCHES AND ACCESSORIES

Test switches is designed and manufactured to allow quick and easy multi-circuit testing of switchboard relays, meters and instruments by any conventional system. These test switches and related test plugs have the features necessary for applications involving the measurement of individual currents and voltages associated with substation instrumentation and protection devices. They have been especially …

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What is the difference between onload and off load switch disconnectors and what is the type of INS switch ?

On load switch disconnector:it is switch disconnector that can open and close the circuit on load and perform the isolation required. Off Load switch disconnector:It is switch disconnector that must open and close the circuit when load is off (it can not operate on nominal load) – For example – Earthing switch used with CB …

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What is Composite Insulator?

A composite insulator is a special insulation control component that plays an important role in overhead transmission lines. There are many types of polymer insulators. What is Composite Insulator Made of?Composite insulator is also called synthetic insulator, non-ceramic insulator, polymer insulator, rubber insulator, etc. The main structure is generally composed of umbrella skirt, FRP core …

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43 years on: Tangshan reborn after earthquake

A 7.8-magnitude earthquake struck Tangshan, North China’s Hebei Province, on July 28, 1976, and claimed the lives of more than 240,000 people. A man mourns the victims at the memorial wall for the Tangshan Earthquake. (Photo: Xinhua) More than 164,000 people were seriously injured, 3,817 people became paraplegic, and 4,204 children became orphans. The catastrophic …

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the precious finding of Kukan, a documentary recording WWII in China

Robin Lung (left) attends the screening of her documentary Finding Kukan at the Shanghai American Center on Saturday. (Photo: Courtesy of Shanghai American Center) Li paid a great deal of attention to the negative portrayal of Chinese in US films from her generation. When the War of Resistance against Japanese Aggression broke out, the international …

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Discovering Los Angeles

Home to one of the most diverse populations in the US, Los Angeles brims with opportunities and resources to help new residents settle in when compared to other major cities in the USA. The warmth of the city cascades from its cultural melting pot and the year-round sunny weather. The cityscape is quite dynamic, featuring …

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Post-COVID-19 changes in the USA

Although certain categories of travellers are allowed to enter the USA, it’s still not recommended to travel there for non-essential reasons. If you’re still looking to relocate to the USA after the COVID-19 crisis, here’s an insight into current and forthcoming changes regarding entry requirements and visas, work, real estate, education, cost of living, lifestyle, …

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