Distribution cabinet
Product Advantages of OS
1. Safe and reliable: integration of isolation and protection, visible brake point, high protection level with locking.
2. Compact design: small size, saves space in cabinets.
3. Easy to operate: front operation, flexible installation, and simple maintenance.
4. Stable performance: strong overload and short-circuit protection, suitable for harsh environments.
5. Wide application: adapted to various low-voltage distribution, industrial, and construction scenarios.
OS Product Information
1. Product Introduction
The OS is a key component of low-voltage power distribution: a manual switch-disconnector with fuse, integrating isolation and fuse protection. With a rated current from 32A to 1250A, it covers AC and DC applications of 400/500/690 V.
It features a compact, modular design, a visible break point, and full protective interlocks. The fuse cover provides IP20 protection against electric shock and cannot be opened in the closed position.
With utilization category AC23A, it supports 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 receivers, feeders, capacitor banks, and drive circuits in low-voltage distribution equipment.
2. Technical parameters (customizable)
Item |
Specifications |
Remarks |
Rated voltage |
400V/500V/500V/690V AC; Optional DC |
No derating below 690V |
Rated current |
32A – 1250A |
Type rating: OS32 to OS1250 |
Utilization category |
AC23A |
Supports load switching, suitable for heavy-duty motor and inverter applications |
Short-circuit withstand |
Up to 100 kA with HRC fuses |
Suitable for high short-circuit conditions near transformers |
Number of poles |
1/2/3/4 poles |
Neutral pole available (left/right/removable) |
Protection degree |
IP20 fuse cover; Generally suitable for internal enclosure protection |
Prevents accidental contact, ensures personal safety |
Mechanical life |
≥10,000 operations |
Reliable mechanism, long maintenance interval |
Operation |
Manual (standard); Motorized (optional OSM) |
Motorized version supports remote control and automation |
Standards |
IEC 60947-3, GB 14048.3, UL/CSA |
Globally compliant with full CE/UL certification |
3. Main Features
Full safety interlocks
Visible break point + locked fuse cover when closed + double insulated handle to prevent fault and electric shock. Can be equipped with padlocks to meet maintenance safety requirements.
Ultra-compact and space-saving
Short circuit current and reduced components for small sizes, ideal for compact cabinets. Dual connection reduces busbar usage and enclosure cost.
Easy installation and maintenance
Full front operation: fuse replacement and handle operation from the front. Top and side mounting are adjustable; telescopic shaft requires no cutting, adapting to different cabinet layouts. Modular for switching, bypass, and interlocking circuits.
Durable and long-lasting
AC23A — a robust kit with a quick mechanism for fast fault clearing. Resistant to high temperatures, humidity, and dust for stable operation in heavy industry and outdoor compact substations.
4. Application scenarios
Industrial drives: Main switch for frequency inverters / soft starters, with fast-acting fuses for thyristor protection; direct motor circuits for heavy-duty AC23A applications.
Low-voltage distribution: main circuit breaker in capacitor banks, isolation and protection for draw-out/plug-in panels, feeder circuits near transformers (high short-circuit).
Commercial and infrastructure: data centers, hospitals, railway transportation, building distribution, combining safe isolation and fast protection.
Special industry: metallurgy, chemicals, mining, ports; withstands harsh conditions and ensures continuous production.
DC and new energy: DC distribution, energy storage systems, auxiliary photovoltaic circuits for isolation and short-circuit protection.
