A nitrogen filled cabinet is a type of gas-insulated switchgear that uses nitrogen as the insulating and protective medium. Unlike traditional air-insulated cabinets, the nitrogen environment prevents oxidation, moisture, and electrical discharge, making it more stable under demanding operating conditions.
This nitrogen cabinet equipment is built with high-strength flame-retardant materials and includes circuit breakers, busbars, disconnectors, and monitoring devices. By keeping internal components in a controlled nitrogen atmosphere, the equipment delivers enhanced electrical safety and extended service life.
Key Features
- Nitrogen gas insulation – eliminates oxidation and reduces arc risks.
- Compact structure – space-saving design suitable for modern facilities.
- High safety protection – resistant to moisture, dust, and external interference.
- Long service life – reduced component aging and corrosion.
- Easy monitoring – equipped with status indicators and pressure gauges.
- Environment-friendly – nitrogen is non-toxic and sustainable compared to SF6.
| .Main Technical Parameters | ||||
| NO. | Item | Cmodule | F module | V module |
| Load switch | Combination apparatus | Vacuum Circuit Breaker | ||
| 1 | Rated voltage | 40.5 | ||
| 2 | 1min power frequency withstand voltage(KV) | 95/118 | ||
| 3 | Lightning impulse withstand voltage(KV) | 185/215 | ||
| 4 | Rated current(A) | 1250 | 125* | 1250 |
| 5 | Short-circuit breaking current(KA) | 31.5 | 31.5* | 20 |
| 6 | Short-circuit making current(KA) | 80 | 80* | 20 |
| 7 | Short-time withstand current(KA) | 31.5 | 20 | |
| 8 | Short-circuit duration(S) | 4 | 4 | |
| 9 | Mechanical life(times) | 5000 | 5000 | 10000 |
| 10 | SF6gas pressure(bar) | 1.3~1.4(20℃) | ||
| 11 | Annual leakage rate | 0.1% | ||
| 12 | Protection class | IP67/4X(Gas chamber/housing) | ||
Advantages
- Superior insulation performance – ensures reliable power distribution.
- Reduced maintenance – nitrogen sealing minimizes wear and tear.
- Improved safety – lowers the possibility of short circuits or arc flash.
- Durability – suitable for harsh industrial and outdoor environments.
- Flexibility – available in multiple configurations for different voltage levels.
- Compliance – meets international standards for switchgear and cabinet equipment.
Applications
The Nitrogen Cabinet Equipment is widely used in:
- Industrial power systems – machinery, automation lines, and heavy equipment.
- Utility grids and substations – reliable operation for low and medium voltage distribution.
- Renewable energy projects – wind farms, solar stations, and hydro plants.
- Commercial buildings – hospitals, shopping malls, and high-rise complexes.
- Transportation hubs – airports, metro networks, and railway stations.
- Mining and chemical plants – environments where robust safety is critical.
Installation & Maintenance
Installation guidelines:
- Place the cabinet in a dry, level, and ventilated environment.
- Connect grounding before energizing the cabinet.
- Verify nitrogen pressure and sealing condition before commissioning.
- Perform functional tests on circuit breakers and relays.
Maintenance practices:
- Check nitrogen pressure regularly to ensure insulation quality.
- Inspect sealing elements and replace if leakage is detected.
- Clean dust and debris around cabinet ventilation.
- Schedule electrical and protective relay tests at least once a year.
How to Select the Right Nitrogen Cabinet Equipment
When choosing a nitrogen pressurized cabinet, consider the following:
- Voltage rating – match with your power system requirements.
- Application environment – indoor or outdoor, industrial or utility.
- Insulation type – nitrogen vs. alternative gas-insulated options.
- Scalability – modular cabinets support future expansion.
- Certification & safety standards – ensure IEC, CE, or ISO compliance.
- Manufacturer expertise – choose experienced nitrogen cabinet manufacturers for reliability.
FAQ
Why use nitrogen instead of air in cabinet equipment?
Nitrogen prevents oxidation, moisture intrusion, and arc discharge, improving insulation and extending lifespan.
Is nitrogen safe for electrical equipment?
Yes, nitrogen is inert, non-flammable, and environmentally friendly.
How often should nitrogen cabinets be checked?
Regular inspections every 6–12 months are recommended to ensure proper sealing and pressure.
Can nitrogen cabinets be customized?
Yes, they are available in different voltage ratings, sizes, and configurations.
Where are nitrogen cabinets most useful?
They are best suited for industrial plants, substations, renewable energy facilities, and high-demand commercial power systems.
