Joongwon’s vacuum circuit breaker adopts the VI(Vacuum Interrupter) that uses vacuum as the insulation medium and thus are easy and safe to use with its superb circuit breaking capacity. In particular, it was first developed in the country by applying the IEC 62271-100 and designed to be much smaller and lighter at its optimal state.

• Excellent breaking capacity
  The current breaking time is very short, and the insulation recovery features are wonderful. It also presents the most stable breaking performance with no potential danger of restrike or reignition.
• Easy repair and maintenance
  Its outstanding electrical and mechanical durability makes it unnecessary special repair or maintenance even for a long-term use. There are various options including the fixed and the draw-out type. And it’s easy to install, repair and check thanks to the compact design.
• High reliability
  Its top durability is guaranteed with more than 10,000 times of operation tests, which makes it the perfect breaking choice for a situation requiring frequent breaking.
  In addition, it’s stable in the mechanical and electrical aspect
• High quality
  It’s compliance with international standard as applying the latest standard IEC 62271-100 developed it.
• High speed re-closing
  It can serve as a high speed-reclosing breaker that is needed to avoid the damage by a lightning impulse or a temporary earth fault.
  Operating Sequence O-0.3sec-CO-3min-CO

■ Mounting style
It has three types of fixed and draw-out, F2 class according to installation methods. The latter one has the main body of the breaker connected or detached at the mainbus.