mercury arc valve sentence in Hindi
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- Mercury arc valves for HVDC were rugged but required high maintenance.
- Mercury arc valves were also used on the following HVDC projects:
- The mercury arc valves of Pole 2 were replaced later by Siemens.
- The original link used mercury arc valve converters, and was rated at.
- In 1977 one mercury arc valve group was replaced by a thyristor valve group.
- See HVDC # Mercury arc valves.
- Consequently, converters built with mercury arc valves are known as line-commutated converters ( LCC ).
- The mercury arc valves were decommissioned on 1 August 2012, ahead of commissioning of replacement thyristor converters.
- The mercury arc valve current-voltage characteristics are highly dependent on the temperature of the liquid mercury.
- Mercury arc valves require an external circuit to force the current to zero and thus turn off the valve.
- Mercury arc valves for HVDC were, therefore, often constructed with four or six anode columns in parallel.
- From the 1920s on, research continued on applying thyratrons and grid-controlled mercury arc valves to power transmission.
- By the end of 2004 the last of the mercury arc valves in Pole 2 had been replaced by thyristor valves.
- The Inter Island link at the time was the last HVDC system in the world with mercury arc valve converters in operational service.
- The development of high power mercury arc valve converters in the 1950s led to the development of several HVDC transmission schemes in other countries.
- These valves, supplied by English Electric each had six anode columns in parallel and were the most powerful mercury arc valves ever built.
- In 1943 Lamm obtained his Ph . D . from the Royal Institute of Technology, studying part-time while developing the mercury arc valve.
- 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.
- 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.
- 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.
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