Distribution cabinet
OS Product Benefits
1. Safe and reliable: integration of insulation and protection, visible braking point, high degree of protection with locking.
2.Compact Design: Small in size, saves space in cabinets.
3.Easy operation: front operation, flexible installation and simple maintenance.
4.Stable performance: strong overload and short circuit protection, suitable for harsh environment.
5.Wide application: adapted to various low-voltage distribution, industrial and construction situations.
OS Product Information
1. Product introduction
The OS is a key component of low-voltage power distribution: a manual switch-fuse unit with load interruption, integrating isolation and fuse protection. With a rated current from 32A to 1250A, it covers AC and DC 400/500/690V applications.
It features a compact, modular design, a visible braking point, and full safety interlocks. The fuse cover provides IP20 protection against electrical current and cannot be opened when closed.
With an AC23A rating, 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 in 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 |
Comments |
Rated voltage |
400V/500V/500V/690V AC; DC optional |
No derating below 690V |
Rated current |
32A – 1250A |
Rating by type: OS32 to OS1250 |
Category of use |
AC23A |
Supports load switching, suitable for heavy-duty motor and inverter applications |
Short circuit resistance |
Up to 100 kA with HRC fuses |
Suitable for high short circuit conditions near transformers |
Number of poles |
1/2/3/4 poles |
Neutral post available (left/right/removable) |
Degree of protection |
IP20 fuse cover; Generally suitable for internal enclosure protection |
Prevents accidental contact, ensures personal safety |
Mechanical life |
≥10,000 operations |
Reliable mechanism, long service interval |
Operation |
Manual (standard); Motorized (optional OSM) |
The 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 security locks
Visible brake point + locked fuse cover when closed + double insulated handle to prevent malfunction and electric shock. Padlockable for maintenance compliance.
Ultra-compact and space-saving
Low current and reduced component count for compact dimensions make it ideal for compact enclosures. Dual connection reduces busbar usage and enclosure cost.
Easy installation and maintenance
Full front-mounted operation: fuse replacement and front-mounted control handle. Top and side mounting are adjustable; the telescopic shaft requires no cutting, adapting to various cabinet layouts. Modular for switching, bypass, and interconnected circuits.
Strong and durable
The AC23A is a rugged kit with a fast mechanism for quick troubleshooting. It's resistant to high temperatures, humidity, and dust for reliable operation in heavy industry and outdoor compact substations.
4. Application scenarios
Industrial Drives: Main switch for frequency inverters/soft starters, with fast fuses for thyristor protection; heavy-duty AC23A straight-line motor drives.
Low voltage distribution: main switch in capacitor banks, insulation and protection for draw-in/feeder panels, feeder circuits near transformers (high short circuit).
Commercial and infrastructure: data centers, hospitals, rail transport, building distribution, combination of secure isolation and rapid protection.
Specialty industry: metallurgy, chemicals, mining, ports; withstands harsh conditions and ensures continuous production.
Direct current and new energy: DC distribution, energy storage systems, auxiliary photovoltaic circuits for isolation and short-circuit protection.
