OS Product Details

1. Product Introduction

OS is a core component in low-voltage power distribution: a manual load break switch-fuse unit integrating isolation and fuse protection. With rated current from 32A to 1250A, it covers 400/500/690V AC and DC applications.

It features a compact, modular design, visible break point and complete safety interlocks. The fuse cover provides IP20 protection against electric shock and cannot be opened when closed.

With utilization category AC23A, it allows load switching and is suitable for motors, frequency inverters, soft starters and reactive power compensation circuits. It operates reliably in harsh environments such as metallurgy and mining. Proven by millions of installations worldwide, it is a highly reliable solution for incomers, feeders, capacitor banks and drive circuits in low-voltage switchgear.

2. Technical Parameters（customizable）

1. Complete Safety Interlocks

   Visible break point + locked fuse cover when closed + double-insulated operating handle to prevent misoperation and electric shock. Can be fitted with padlocks to meet maintenance safety regulations.

2. Ultra-compact & Space-saving

   Short current path and reduced-component design for small size, ideal for compact cabinets. Dual cable connection reduces busbar usage and cabinet cost.

3. Easy Installation & Maintenance

   Full front operation: fuse replacement and handle control from front. Top/side mounting adjustable; telescopic shaft requires no cutting, adapting to various cabinet layouts. Modular for switching, bypass and interlocked schemes.

4. Heavy-duty & Durable

   AC23A heavy-duty rating, quick make/break mechanism for fast fault clearing. Resistant to high temperature, humidity and dust for stable performance in heavy industry and outdoor compact substations.

5. Full-scenario Compatibility

   Compatible with DIN/BS/NFC/UL/CSA HRC fuses. Full voltage range 400–690V, suitable for motors, inverters, capacitor compensation and DC circuits.

4. Application Scenarios

1. Industrial Drives: Main switch for frequency inverters / soft starters, with fast fuses for thyristor protection; motor direct-on-line circuits for AC23A heavy-duty use.

2. Low-voltage Distribution: Main switch in capacitor banks, isolation and protection for incomer/feeder panels, feeder circuits near transformers (high short-circuit).

3. Commercial & Infrastructure: Data centers, hospitals, rail transit, building distribution, combining safe isolation and fast protection.

4. Special Industry: Metallurgy, chemical, mining, ports; withstands harsh environments and ensures continuous production.

5. DC & New Energy: DC distribution, energy storage systems, PV auxiliary circuits for isolation and short-circuit protection.