Introduction:  

In the extreme environment of deep-well mines, the stable operation of the drainage system is crucial. A large copper mine -660m successfully applied the Changsha ATA 6 unit GKGR-300/06(K) mine general-purpose high-voltage soft starter control cabinet, effectively overcoming the challenges of ultra-deep, high humidity, strong corrosion, high dust, and severe power grid fluctuations, ensuring the reliable operation of the drainage system. 

I. Project Background and Operational Challenges 

This copper mine -660m faces severe underground environmental challenges in its main drainage system: 

• Ultra-deep, high-pressure environment: -660m The depth results in high air pressure and extremely high humidity. 
• Highly corrosive environment:   High concentration of humidity and corrosive gases are present. 
• High dust pollution:   Continuous mining dust, concentration often higher than 10mg/m³ 。
• Complex electrical environment:   Frequent voltage fluctuations in the underground power grid ( ±10% range), with high-power water pumps generating up to 8-10 times the rated current surge during startup. 

These factors cause traditional electrical equipment to easily experience insulation aging, component corrosion, poor heat dissipation, and startup failures, seriously threatening the continuity of the drainage system and mine safety. 

II. Solution: GKGR-300/06(K) mine general-purpose high-voltage soft starter control cabinet 

In response to the above challenges, the project selected Changsha ATA 6 unit GKGR-300/06(K) mine general-purpose high-voltage soft starter control cabinet , whose core advantages are: 

1 , Excellent environmental adaptability 

• High protection level: IP54 protection level, effectively preventing dust and splashing water. 
• Reinforced corrosion protection design:   The main body of the cabinet is made of 304 stainless steel material, and a heavy anti-corrosion coating is applied; key electrical components are subjected to nickel plating and other special anti-corrosion treatments, significantly improving the tolerance in environments containing H₂S and other corrosive gases. 
• Moisture and mildew prevention:   Meets the stringent requirements of general-purpose mining equipment for humid underground environments. 

2 , Intelligent soft start technology 

• Effective suppression of starting current:   Using graded torque control technology, the starting current of the high-power water pump is significantly reduced from the traditional 8-10 times the rated current to approximately 3 times, greatly reducing the impact on the fluctuating power grid. 
• Dynamic load adaptation:   It can automatically adjust the starting curve according to the water level in the water tank, effectively avoiding the destructive water hammer effect caused by starting too fast or too slow, protecting the pipeline system. 
• Smooth and non-interference switching:   After the startup process is completed, smooth switching to the power frequency grid is achieved through contactless switching technology, with no current surge during the switching process. 

III. Actual Operational Effectiveness 

6 unit GKGR-300/06(K) The control cabinet was 2025 year 7 month in this copper mine -660m main drainage system, achieving significant results: 

• One-time startup success:  6 The equipment was successfully started on the first attempt, with the starting current stably controlled within the design target value (approximately 3.5 times the rated current), verifying the reliability of the technical solution. 
• Efficient and stable operation:   From system energization to full-load operation of the water pump ， no program errors or misoperation of protection devices occurred throughout the process, and the system operated smoothly. 
• Early delivery:   The project was implemented smoothly ， zero rework delivery, completed ahead of schedule by 5 days. 
• Continuous stable performance:   In -660m deep, high-humidity, high-concentration corrosive gas and dusty harsh conditions, the equipment has been operating at full load to date and is in good condition. 

In -660m In such a high-humidity, high-corrosion environment, 6 high-voltage soft starter control cabinet's continuous and stable operation is satisfactory. Its soft start technology effectively reduces the starting current surge, protecting the relatively fragile underground power grid, and effectively solving the core needs of the deep-well drainage system for startup reliability and operational stability. 

IV. Industry Value and Promotion Significance 

The successful application of this project fully verifies the comprehensive capabilities of Changsha ATA GKGR series of general-purpose high-voltage soft starter control cabinets in extreme mining conditions such as deep wells, high humidity, strong corrosion, and high dust: 

• Reliable environmental tolerance: IP54 Protective combination with heavy anti-corrosion structural design, effectively resisting the erosion of harsh mining environments on equipment. 
• Intelligent drive protection:   Adaptive soft-start technology effectively matches the characteristics of the mine power grid, suppressing starting impact and protecting the power grid and equipment. 
• Reduced maintenance burden:   Fully enclosed dust-proof design and robust structure reduce the frequency and difficulty of equipment maintenance in areas with difficult maintenance, such as deep shafts. 

Changsha ATA GKGR Series of general-purpose high-voltage soft-start control cabinets for mining applications were successfully implemented in this copper mine -660m The successful implementation of the mid-section main drainage system project is a typical case of the application of high-voltage soft-start technology for mining in extremely deep-well environments. It proves that through targeted environmental adaptability design and advanced soft-start technology, the stable, reliable, and efficient operation of key drainage systems in deep mines can be effectively ensured.