Nitrogen Injection System For Transformer Protection
Frequency: 50-60Hz Number of nitrogen cylinders: 3 Nitrogen cylinder capacity 40L Expected lifespan: 30 years Altitude: below 5000 meters Installation location: indoor/outdoor Nitrogen injection system for transformer protection is designed to protect oil-immersed transformers against explosion and fire hazards. It provides rapid pressure relief and nitrogen-based fire suppression for substations, wind farms, and other critical power facilities.
Description
I. Product Introduction:
The nitrogen injection system for transformer protection combines rapid pressure relief and automatic fire suppression to help prevent explosions and reduce fire damage.
Using a "drain oil first, inject nitrogen second" principle, the nitrogen injection system for transformer protection operates automatically through internal pressure, without external power or sensor signals. Nitrogen cools the affected area and reduces oxygen availability, helping extinguish fires and prevent reignition.
With its compact design and reliable operation, the system is suitable for substations, wind farms, underground power facilities, and chemical plants. The nitrogen injection system for transformer protection helps safeguard critical transformer assets, minimize fire-related losses, and reduce operational downtime.
II. Model Explanation
III. Product Details/Advantages:
- 1. Millisecond-Level Pressure Relief
Responds to abrupt internal pressure changes in milliseconds for fast pressure release and lower transformer explosion risks.
- 2. Reliable Pressure-Driven Activation
Triggered directly by internal pressure variation, requiring no external power or extra drive systems for enhanced reliability.
- 3. Integrated Explosion Prevention & Fire Suppression
Integrates rapid pressure relief, hot oil draining and nitrogen injection to prevent explosions, extinguish fires and avoid re-ignition.
- 4. Multiple Models for Various Transformers
Diverse specifications available to fit different oil-immersed power transformers and project demands
IV. Product Parameters
|
Category |
Parameter |
Specification |
|
Operating Conditions |
Ambient Temperature |
-40°C to +60°C |
|
Ambient Humidity |
≤85% at 40°C |
|
|
Electrical System |
Power Supply |
DC 220 V |
|
Nitrogen Supply |
Cylinder Storage Pressure |
13 MPa |
|
Pressure Reducer Outlet Pressure |
0.7 MPa |
|
|
Pressure Reducer Outlet Flow Rate |
12 m²/h |
|
|
Flow Regulating Valve Outlet Flow Rate |
12 m²/h |
|
|
Shut-off Valve Operating Flow Rate |
3.9-6 m²/h |
|
|
Fire Detection |
Fire Detector Type |
Fusible Alloy |
|
Operating Temperature |
110°C±5°C/135°C± 5°C |
|
|
Piping System |
Metal Hose Operating Pressure |
13 MPa |
|
Nitrogen Injection Line Diameter |
DN25 |
|
|
Oil Drain Line Diameter |
DN125 |
|
|
Oil Drainage System |
Oil-Gas Separator Volume |
3 m² |
V. Scope of Supply
1.Nitrogen storage cabinet - 1 set; 1900 x 1000 x 600 mm
2. Decompression chamber - 3 sets; main body, on-load switch, etc.
3. Block valve-1 set; DF-80
4. Oil and gas separation injection - 1 set
5. Control cabinet -1 set; 800 x 600 x 2260 mm
6. Oil discharge pipeline and accessories - 1 set
7. Nitrogen injection pipeline and accessories 1 set
8.Other installation accessories-1 set
VI. Optional Customization Solutions
We offer customized solutions for the nitrogen injection system for transformer protection, tailored to your site conditions and operational requirements. Whether you need adjustments to installation dimensions, spatial layout, or operating temperature ranges, we can adapt the system design to ensure proper installation and reliable operation. We also customize key parameters, including oil discharge volume (maximum, rated, and minimum), oil discharge pressure, inlet and outlet pipe diameters, and control cabinet DC power supply specifications. With flexible configuration options, the nitrogen injection system for transformer protection can be adapted to different transformer types and project requirements, helping ensure seamless integration and dependable performance.
VII. Quality
Products using this device have generally passed ISO9001, ISO14001, and ISO45001 system certifications. Before leaving the factory, all products undergo withstand voltage, insulation, and operational reliability tests, and some have also passed the testing of the National Fixed Fire Extinguishing System and Fire-Resistant Components Quality Supervision and Inspection Center.
VIII. Real-world cooperation cases
We supplied a nitrogen injection system for transformer protection for the 25-YD238 project at the 110 kV Zhanaozen Thermal Power Plant substation in Kazakhstan. Integrating pressure relief, oil drainage, and nitrogen injection, the system helps prevent transformer explosions and suppress fires in oil-filled high-voltage equipment.
To meet the challenges of winter temperatures as low as -40°C, the project focused on low-temperature reliability, remote monitoring integration, and installation requirements. During customer acceptance, our engineering team demonstrated the explosion-proof diaphragm pressure relief mechanism and control system functions, helping verify the system's suitability for the demanding operating environment and improve substation fire safety.
IX. Application Scenarios
1. Power Substations
The nitrogen injection system for transformer protection helps prevent transformer explosions and suppress fires, protecting critical substation equipment and supporting reliable power supply.
2. Power Plants
Designed for oil-filled power transformers in thermal, hydroelectric, and other power plants, the system helps reduce fire-related damage and operational interruptions.
3. Wind Farms
Provides additional fire protection for transformer assets in wind power installations, helping improve equipment safety and reduce costly downtime.
4. Oil & Gas Facilities
Helps protect oil-filled transformers supplying power to refineries, petrochemical plants, and other industrial facilities where fire incidents can disrupt critical operations.
X. Our Service
Our after-sales service and technical team solemnly promises
Pre-Sales Service
Consultation & Guidance: 24/7 online support with expert engineers to clarify needs, recommend solutions, and advise on pricing and processes.
On-Site Inspection: Engineers visit sites for precise measurements and environmental assessment, deliver detailed reports to support tailored system design.
After-Sales Service
Year Warranty: Covers material/manufacturing defects as per contract.
Dedicated Support: One-on-one follow-up from a specialized team for seamless assistance.
Multi-Channel Help: Support via contacts, project teams, or website; fast global coordination for repairs or replacements during warranty.
XI. Packaging and Transportation
XII. FAQ
FAQ
Q: What transformer interfaces are required before installing the nitrogen injection system for transformer protection?
A: The transformer should have one oil drain port, four nitrogen injection ports, one mounting position for the shut-off valve, and eight mounting nuts for fire detectors reserved in advance. Please consult our engineering team to confirm the exact locations and dimensions before installation.
Q: Where should the fire protection cabinet be installed?
A: The installation location should be determined according to the site layout, transformer position, and reserved oil drain port. Typically, the fire protection cabinet should be installed 3–8 meters from the transformer's oil drain port. The final location should be confirmed based on the actual site conditions.
Q: What should be confirmed before installing the system?
A: Before installation, confirm that all required transformer interfaces and mounting positions are reserved, and that the fire protection cabinet location meets the project's site requirements. We recommend coordinating with our technical team in advance to verify interface dimensions, installation clearances, and piping arrangements.
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