Product Features

• Adopts vacuum interrupter for arc‑extinguishing The vacuum interrupter maintains high‑vacuum inside, acting as insulating and arc‑quenching medium during live operation. When contacts separate under load via operating mechanism, vacuum arc is generated and extinguishes at current zero‑crossing to interrupt circuit current.
• Insulation Method Composite insulation of air‑silicone rubber and epoxy resin; air‑porcelain insulator solution is also available. Silicone grease is applied on upper and lower porcelain insulators to improve insulation performance and prevent condensation.
• Current transformers can be installed inside the cabinet or mounted externally.
• The switch can be fitted with three‑phase CTs for protection, measurement or metering. CTs are normally designed with four‑winding multi‑ratio taps: 50‑100‑150/5A, 100‑200‑300/5A or 200‑400‑600/5A. Other ratios can be customized according to customer load requirements. Protection accuracy class: 10P20; measurement accuracy class: 0.2S, 0.2, 0.5.
• Housing material: stainless steel or ordinary carbon steel.
• Operating Mechanism Equipped with CT19BW spring mechanism, supporting manual and electric operation. An over‑current trip coil is built‑in. When secondary current of CT reaches 5A, the trip coil actuates and trips the switch to realize overload, short‑circuit and instantaneous‑trip protection.
• Structure Type Two layout options based on mechanism position: conventional type (mechanism on the right side) and central‑mounted type (mechanism in the middle).
• Mounting Bracket Mounting bracket can be supplied upon customer request, with adjustable height as required.

This product features simple structure, easy operation, high safety & reliability, stable performance, long service life and long maintenance interval.