TFTR ECS safety ground switch soft close modification

Author

Ancher, C.R. ; Tureikas, S.

Author_Institution

Princeton Plasma Phys. Lab., NJ, USA

Volume

2

fYear

1993

fDate

11-15 Oct 1993

Firstpage

897

Abstract

The safety disconnect and grounding switches represent a major group of components used to support the Tokamak Fusion Test Reactor. There are fifteen such switches in the TFTR power conversion TF and PF coil system. These switches are metal enclosed DC equipment, rated at 15 kV (2500 amperes continuous). They contain gapless zinc oxide arrestors, a stored-energy-operated, double-pole, single-throw grounding switch (capable of closing in on an 80 kA load current), a double-pole, single-throw disconnect switch (to isolate the load from the power supplies), and polarity reversal bus links. In addition to circuit protection the switches provide a level of electrical isolation when it is necessary to access the DC side of the machinery. The operation of the stored energy grounding switches are the subject of this paper

Keywords

arresters; earthing; fusion reactor design; fusion reactor operation; fusion reactor safety; switchgear; 15 kV; 2500 A; 80 kA; DC side; TFTR ECS safety ground switch; Tokamak Fusion Test Reactor; ZnO; circuit protection; double-pole grounding switch; electrical isolation; fusion reactor operation; gapless arrestors; metal enclosed DC equipment; polarity reversal bus links; power conversion PF coil system; power conversion TF coil system; power supplies; safety disconnect switches; single-throw grounding switch; soft close modification; stored-energy-operated grounding switch; Coils; Ground support; Grounding; Inductors; Power conversion; Safety; Switches; Testing; Tokamaks; Zinc oxide;

fLanguage

English

Publisher

ieee

Conference_Titel

Fusion Engineering, 1993., 15th IEEE/NPSS Symposium on

Conference_Location

Hyannis, MA

Print_ISBN

0-7803-1412-3

Type

conf

DOI

10.1109/FUSION.1993.518469

Filename

518469