air insulated switchgear
Product Advantages of osz:
1. Safety and Reliability: Integrated medium-low voltage protection with comprehensive interlocks, visualized fault points, and high protection ratings.
2. Compact Design: Space-efficient cabinet structure that saves both space and costs.
3. User-Friendly Operation: Front-mounted operation and maintenance for flexible installation.
4. Stable Performance: Robust short-circuit protection compatible with heavy loads and harsh environments.
5. Versatile Applications: Suitable for industrial, infrastructure, distribution rooms, and diverse scenarios.
OSZ Product Details
1. Product Introduction
OSZ takes the UniGear ZS series medium-voltage air-insulated switchgear as the core, and seamlessly integrates the PowerLine OS switch-fuse unit, forming a full-link power distribution and protection system from 12–24kV medium-voltage incoming/feeder to 0.4–0.69kV low-voltage side.
The cabinet adopts metal-clad, five-compartment partitioning and full-front operation design. The cabinet width can be as narrow as 500mm and supports wall-mounted installation.
The medium-voltage side is equipped with VD4 vacuum circuit breaker, with complete five-prevention interlock and internal arc protection; the low-voltage OS realizes dual functions of isolation and fast fuse protection, with visible break point and closed-door interlock to ensure maintenance safety.
The solution is compatible with digital monitoring, complies with global standards such as IEC/GB/UL, and is verified by millions of applications. It is suitable for industrial and infrastructure power distribution scenarios with limited space and high reliability requirements.
2. Technical Parameters（customizable）
| Item | Medium Voltage (UniGear ZS) | Low Voltage (OS Switch-Fuse Unit) | Remarks |
Rated Voltage | 12kV/24kV (AC 50Hz) | 400V/500V/690V AC; DC optional | MV configured per system; LV covers industrial standard levels |
Rated Current | Main busbar: 630–4000A; Branch: 630–1250A | 32–1250A (by model) | Rated at 40℃, temperature rise meets 1.1× test |
Short-Circuit Withstand | 25–31.5kA/4s (12kV); 31.5kA/4s (24kV) | Up to 100kA with HRC fuses | MV: short-time withstand; LV: breaking capacity |
Internal Arc | IAC AFLR 31.5kA/1s | Fuse cover IP20, cabinet-level protection | MV: internal arc protection; LV: anti-touch protection |
Operating Mechanism | VD4 vacuum circuit breaker, mechanical life ≥30,000 operations | Manual (standard); OSM motorized (optional) | MV withdrawable; LV supports remote control |
Pole Configuration | 3-pole (earthing switch optional) | 1/2/3/4-pole, neutral pole optional | LV suitable for single/three-phase with N line |
Standards | IEC 62271-200, GB 3906, DL 404 | IEC 60947-3, GB 14048.3, UL/CSA | Global compliance, complete CE/UL certifications |
Cabinet Dimensions | Width 500/650/800mm, wall-mounted | Modular embedded, front operation depth ≤800mm | MV footprint reduced by over 25% vs conventional |
3. Main Features
Full-link safety closed-loop
MV five-prevention interlock + internal arc protection; LV visible break point + closed interlock + double-insulated handle, padlockable. Graded fault clearance avoids cascade tripping, ensuring personnel and equipment safety.
Ultra-compact & space-saving
ZS cabinet width from 500mm; OS compact modular design, dual cable connection reduces busbar usage. Full-front operation requires no rear access, substation area reduced by over 25%, lowering construction cost.
Efficient installation & operation
High interchangeability of MV withdrawable trolley; LV fuse replacement from front, telescopic shaft without cutting. Top/side mounting adjustable for retrofitting. Motorized and digital modules optional for remote control and condition monitoring.
Heavy-duty & weather-resistant
MV VD4 breaker supports 30 full-capacity interruptions; cabinet passes condensation and vibration tests. LV OS meets AC23A heavy-duty category, resistant to high temperature, dust, suitable for metallurgy, mining, marine and harsh environments.
Flexible full-scenario compatibility
MV single/dual busbar and double-layer layout optional; LV compatible with DIN/BS/UL HRC fuses, covering motors, inverters, capacitor compensation and DC circuits, supporting customized expansion.
4. Application Scenarios
Industrial core power distribution: MV incoming/feeder for metallurgy, chemical, mining, ports; LV main switch for inverters/soft starters, suitable for heavy-duty and high short-circuit conditions.
Data centers & infrastructure: Dual-power distribution for data centers, hospitals, rail transit, compact space with high-reliability isolation and fast protection for critical loads.
Commercial & residential buildings: Substations in offices, malls, high-end communities; 500mm narrow cabinet for dense layout, full-front maintenance reduces operation difficulty.
New energy & energy storage: MV bus/feeder for PV, wind, ESS stations; LV PCS and converter auxiliary circuits, compatible with AC/DC protection.
Special environments: Offshore platforms, ships, nuclear power plants, high-altitude areas; certified for seismic, tilt, humidity and heat resistance to meet strict working conditions.
