Circuit Breaker
Compact VCB
Features
Joongwon’s vacuum circuit breaker adopts the VI(Vacuum Interrupter) that uses vacuum as the insulation medium and the electromotive spring and thus are easy and safe to use with its superb circuit breaking capacity. In particular, it was designed to be much smaller and lighter for 800mm compact enclosed switchgear.
- 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 since the operational power is free from impacts thanks to the electromotive spring method. - 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
VCB Ratings
| Type | JWV MS242506 | JWV242512 |
|---|---|---|
| Rated voltage(kV) | 25.8 | |
| Rated current(A) | 630 | 1250 |
| Rated power frequency(Hz) | 60 | |
| Rated short-circuit breaking current(kA) | 25 | |
| Rated short-circuit making current(kA) | 65 | |
| Rated short time withstand current(kA 1sec) | 25 | |
| Rated power frequency withstand voltage(kA)(rms) | 60 | |
| Rated lighting impulse withstand voltage(kV)(Peak) | 125(1.2×50㎲) | |
| No-load closing time(s) | ≤ 0.1 sec | |
| Opening time(s) | ≤ 0.1 sec | |
| Rated short circuit breaking time(Cycle) | 3 | |
| Operating duty | O – 0.3 sec – CO – 3min – CO | |
| Applied standard | IEC 62271-100 | |
| Closing method | spring charge | |
| Tripping method | Shunt trip | |
| Rated motor operating voltage(V) | DC 110V | |
| Rated closing control voltage(V) | DC 110V | |
| Rated tripping control voltage(V) | DC 110V | |
| Raged closing control current(A) | 5A below | |
| Rated tripping control current(A) | 5A below | |
| Motor operating current(A) | 5A below | |
| Aux. contact class | Class 1 | |
| Mechanical endurance | M2 (10,000) | |
| Electrical endurance | E1 | |
| Restrike class | C2 | |
Earth Switch Ratings
| Type | JWE MS2525 |
|---|---|
| Rated voltage(kV) | 25.8 |
| Rated power frequency(Hz) | 60 |
| Rated power frequency withstand voltage | 60 |
| Rated lighting impulse withstand voltage | 125(1.2×50㎲) |
| Applied standard | IEC 62271-102 |
| Operation method | manual |