mercury arc sentence in Hindi
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- The talk page of this article is very long, but these are the only two instances where the term " mercury arc rectifier " has been used.
- On 1 August 2012, Transpower decommissioned the remaining half of the Pole 1 mercury arc valve converter stations at Benmore and Haywards, after 47 years in service.
- In 2004, the mercury arc valves groups were replaced with light-triggered thyristor groups to eliminate the environmental risks of maintenance costs of the obsolete mercury arc valves.
- Originally they used rotary converters, a few of which are even still in operation, but most were supplanted first by mercury arc rectifiers and then by semiconductor rectifiers.
- The mercury arc rectifier was invented by Peter Cooper Hewitt in 1902 and further developed throughout the 1920s and 1930s by researchers in both Europe and North America.
- Unlike the usual side-pumping method, the light from a mercury arc lamp was pumped into the end of a very small rod, to achieve the necessary population inversion.
- Nevertheless the scheme provided valuable experience for designing the much larger ?00 kV Volgograd Donbass project which was completed in 1965 using mercury arc valves of entirely Soviet design.
- Mercury arc rectifiers are usually supported by insulators mounted on the floor, while thyristor valves may be either supported by insulators or hung from the roof of the valve hall.
- A valve hall is equipped with heating and cooling equipment to control the temperature of the mercury arc rectifiers ( which operate best over a narrow temperature range ) or thyristors.
- Between 1992 and 1993 the mercury arc valves of Pole 1 were replaced with thyristor valves by GEC Alsthom, increasing the maximum power and voltage of the line to its current levels.
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