The Vs1 vacuum circuit breaker adopts a front and rear arrangement of operating mechanism and arc extinguishing system, which makes the operational performance of the mechanism more in line with the required performance of the arc extinguishing chamber, reduces unnecessary intermediate transmission links, lowers energy consumption and noise, and makes the operational performance of the circuit breaker more reliable.

The arc extinguishing chamber of the circuit breaker uses vacuum as the extinguishing medium and insulation medium, and adopts copper chromium contact material and cup-shaped longitudinal magnetic field structure. It has the advantages of high voltage resistance, stable insulation strength, rapid arc recovery, strong breaking ability, and low electrical wear.

The arc extinguishing chamber and insulation rod are longitudinally installed in a tubular insulation cylinder. The sealed product insulation cylinder is made of epoxy resin cast using APG technology, forming a sealed pole with the arc extinguishing chamber, insulation rod, and insulation cylinder. Specially resistant to creeping electricity.

This structure completely isolates dust from the surface of the arc extinguishing chamber and prevents it from accumulating. It not only prevents damage to the arc extinguishing chamber from external factors, but also exhibits high resistance to voltage effects in humid, hot, and severely polluted environments.

The operating mechanism is a flat spring energy storage type with manual and electric energy storage functions; The chassis is divided into five assembly spaces by four partitions, each containing an energy storage part, a transmission part, a trip part, and a buffer part.

The circuit breaker can be installed as a fixed unit in a fixed switchgear, or combined with a dedicated propulsion mechanism (chassis) to form a handcart unit for installation in a handcart switchgear. The circuit breaker control circuit is equipped with a locking electromagnet and an anti trip relay, which have electromagnetic locking and anti trip functions.

In addition, the circuit breaker can also be equipped with an overcurrent release, which can achieve overcurrent protection function.

Circuit breakers have excellent electrical performance, high insulation level, long service life, simple maintenance, no pollution, no explosion hazard, and low noise.