- Количество слайдов: 3
Status report: 1 MV post insulator in HVD 1 • In the transmission lines of the high voltage power supply procured by JADA, 1 MV post insulators manufactured by HITACHI Ltd. are used to support 1 MV conductor inside the tank of the transmission lines, where SF 6 insulation gas at 0. 6 MPa is immersed. • In the HVD 1 procured by F 4 E, the same type of post insulator used in the insulation gas is required to support a 1 MV bushing of the HVD 1. They are to be manufactured by Siemens, however Siemens would like to purchase the 1 MV post insulators from HITACHI. • HITACHI declined Siemens’s request. NB Heating Tech. Gr, JAEA
History of discussions • In the interface meeting in Feb/2015, F 4 E informed us that Siemens wants to use this post insulator to the support of the bushing of HVD 1 procured by F 4 E, and requested JAEA to ask HITACHI to sell this 1 MV post insulator to Siemens. • To fulfill F 4 E’s request, JAEA has pushed this request to HITACHI’s power supply division several times, but was rejected each time. • In the beginning of April, JAEA visited HITACHI to negotiate directly with the contact person for these post insulators, whom is the leader of the GIS (Gas insulated switchgear) group in HITACHI. However, he was also rejected it because this insulator does not sold by single component and HITACHI worries about the Intellectual property. • JAEA reported these situations to F 4 E and IO on 10/April/2015. • Afterwards, there was no information from F 4 E for a while until the NB program committee in 22/May, where F 4 E updated us on their situation. • To change HITACHI’s decision, we think direct discussions between both companies is necessary, therefore, JAEA proposed to F 4 E that Siemens contact Hitachi directly. • First direct contact has been performed between Siemens and Hitachi last week.
Reply to F 4 E’s documents (The following documents were send from F 4 E in 11/Jun/2015. “ 2015 -06 -03 -F 4 E. ppx” and “F 4 E-OPE-083_-_Note_summarizing_issue_with_1 MV_post_insulator. doc”) • First, we have thought why Siemens wants to buy the post insulator from HITACHI because Siemens has many experiences of high voltage components. • However, the documents from F 4 E show that Siemens has experiences of 1 MV insulation in air, but not had experiences of 1 MV insulation in a gas, and takes 30 months to realize 1 MV post insulator in a gas. Therefore, Siemens wants to buy 1 MV post insulator using in a gas from HITACHI. • In the first direct discussion between companies last week, HITACHI answered to Siemens that HITACHI will not supply the individual postinsulator as a single item selling but can solely provide the completed equipment with built-in such post-insulators. • We support with F 4 E colleagues that a discussion between Siemens and HITACHI is progressed. • On the other hands, we have proposed the alternative structure to F 4 E colleagues. We always open the discussion of the technological solution on 1 MV insulation with F 4 E colleagues.