Fuse Selection for the Two-Stage Explosive Type Switches

5th International Conference: Modern Technologies For Non-Destructive Testing

材料科学;物理学

Muravlev, I.O.^1 ; Surkov, M.A.^1 ; Tarasov, E.V.^1 ; Uvarov, N.F.^2,3

National Research Tomsk Polytechnic University, Tomsk, Russia^1

Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch, RAS, Novosibirsk, Russia^2

Novosibirsk State Technical University, Novosibirsk, Russia^3

关键词: Current interruption;    Diesel generators;    Electric explosion;    Electric strength;    Electrical equipment;    High speed flows;    Renewable energies;    Working capacity;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/189/1/012004/pdf
DOI  :  10.1088/1757-899X/189/1/012004

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In the two-level explosive switch destruction of a delay happens in the form of electric explosion. Criteria of similarity of electric explosion in transformer oil are defined. The challenge of protecting the power electrical equipment from short circuit currents is still urgent, especially with the growth of unit capacity. Is required to reduce the tripping time as much as possible, and limit the amplitude of the fault current, that is very important for saving of working capacity of life-support systems. This is particularly important when operating in remote stand-alone power supply systems with a high share of renewable energy, working through the inverter transducers, as well as inverter-type diesel generators. The explosive breakers copes well with these requirements. High-speed flow of transformer oil and high pressure provides formation rate of a contact gap of 20 - 100 m/s. In these conditions there is as a rapid increase in voltage on the discontinuity, and recovery of electric strength (Ures) after current interruption.