![](/assets/images/picto-drapeau-france-3a76576a5d60a512053b4612ab58dae5.png)
7. Cutting through the void
The dielectric properties of vacuum have long been known, and have been used, for example, in vacuum bulbs for X-ray tubes. The use of vacuum in switchgear was envisaged as early as 1920, but, due to technological contingencies, has only been effective at industrial level since 1960. Since the 1970s, vacuum technology has gained in popularity because of the advantages it offers over oil or air:
space-saving ;
better safety ;
greater endurance.
7.1 Dielectric properties of vacuum
In principle, a vacuum is an ideal dielectric medium: there is no matter, and therefore no electrical conduction. However, vacuum is never perfect, and in...
Exclusive to subscribers. 97% yet to be discovered!
You do not have access to this resource.
Click here to request your free trial access!
Already subscribed? Log in!
![](/assets/images/logo-eti-286623ed91fa802ce039246e516e5852.png)
The Ultimate Scientific and Technical Reference
This article is included in
Electricity networks and applications
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Cutting through the void
Bibliography
Standards
- Coordination de l'isolement (1993-11). - CEI 60071-1 -
- Coordination de l'isolement (1996-12). - CEI 60071-2 -
- Interrupteurs à haute tension (1998-01). - CEI 60265-1 -
- Interrupteurs à haute tension (1988-03) ; amendement 1 (1994-07) ; amendement 2 (1998-08). - CEI 60265-2 -
- Contacteurs pour courant alternatif haute tension et démarreurs de moteurs à contacteurs - CEI 60470 - (2000-05)
- Amendement...
Exclusive to subscribers. 97% yet to be discovered!
You do not have access to this resource.
Click here to request your free trial access!
Already subscribed? Log in!
![](/assets/images/logo-eti-286623ed91fa802ce039246e516e5852.png)
The Ultimate Scientific and Technical Reference