As a core component of power transmission systems, медные шины are an important choice for industry due to their high electrical conductivity, corrosion resistance and mechanical strength. However, the durability of its performance is directly dependent on its maintenance and management. This paper is based on industry standards and practical experience, from the installation specifications to troubleshooting, to provide a complete set of copper busbar maintenance system .

1. Installation rules of copper busbars

Environmental requirements

• Temperature and humidity control: the installation area needs to maintain relative humidity ≤ 85%, temperature range -25 ℃ ~ +40 ℃, to avoid condensation (recommended with temperature and humidity monitoring device)
• Anti-corrosion layout: maintain a distance of ≥5 meters from the source of acid and alkali gases, and it is recommended to use tinned copper busbar or increase the anti-corrosion coating in the coastal areas.
• Principle of space reservation: Reserve 1.5mm expansion gap per meter according to the length of busbar, and ≤2.5m spacing of bracket for vertical installation.

Handling and storage specifications

• Anti-deformation treatment: busbars with a length of >6 meters need to be lifted with special spreaders at multiple points, and soft partitions should be placed between the layers when storing.
• Antioxidant management: the ends of busbars not installed after opening should be coated with conductive paste and sealed with heat-shrinkable tubes.

Technical of connection and fixing

2. Dimensions of routine maintenance

A. Cleaning and maintenance system

• Surface dusting: monthly use of compressed air (pressure ≤ 0.3MPa) with anti-static brush cleaning, dusty environment encrypted to weekly
• Deep cleaning: quarterly wipe the insulation layer with anhydrous ethanol, prohibit the use of silicone-based cleaners to prevent flashover.

B. Temperature rise monitoring program

• Key Temperature Measurement Points: Infrared temperature measurement labels are installed at joints, corners, and through walls, and wireless temperature sensors are recommended.
• Early warning threshold: ambient temperature +55℃ (Class B insulation) or +70℃ (Class F insulation) triggers a secondary alarm.

C. Mechanical condition management

• Bolt tightening cycle: 4.8 grade bolts are re-tightened every 6 months, 8.8 grade high-strength bolts are inspected annually (using the torque marking method).
• Deformation detection: laser straightener is used to detect the curvature, and the allowable deviation is ≤ 0.2% of the length of the busbar.

3. Standardized process of regular maintenance

a. Annual preventive test

• Insulation test: 2500V megohmmeter measurement, ≥50MΩ between phases, ≥20MΩ to ground
• Loop resistance: DC voltage drop method test, deviation value ≤ 20% of factory value
• Local discharge detection: ultrasonic + UHF joint detection, local discharge <20pC

b. Three-year in-depth maintenance

• Metallographic analysis: intercept 5cm sample testing grain size, requirements ≥ 0.015mm
• Stress test: mechanical strength retention rate ≥95% after simulated short-circuit current (3s rated current)

4. Fault diagnosis and emergency treatment

Case library: high-frequency failure solutions

4.1 Abnormal temperature rise

• Phenomenon: Sudden temperature rise of 15℃ at the joint
• Processing procedure: infrared imaging localization → power outage grinding contact surface → applying DJG-II type conductive paste → torque calibration

4.2 Insulation deterioration

• Characteristics: annual decrease rate of insulation resistance＞30
• Repair program: local spraying of PRTV paint or replacement of insulation sleeve (with the voltage withstand test)

4.3 Ground fault

• Troubleshooting steps: Segmental insulation test → local discharge positioning → humidity test → support parts inspection (prioritize the use of oscillating wave detector)

6. Safety operation

• Disconnection procedure: disconnect the load side first → check the power → hang the grounding wire → set up physical isolation barriers
• Protective equipment: must be equipped with 10kV insulated gloves, anti-arc masks, flame-retardant overalls.
• Emergency response: develop 6 types of special plans such as busbar short circuit, insulation breakdown, etc., and practice every half a year.

Case study: A data center busbar reconstruction project

Background: Localized overheating after 7 years of operation

Solution:

1. Thermal imaging scanning to locate 12 hidden trouble spots
2. Replacement of 8 sets of highly flexible connectors
3. Installation of intelligent monitoring terminals
4. Result: Downtime reduced by 83% and life expectancy extended to 20 years.

Заключение

Scientific maintenance management can extend the life of copper busbar system by 3-5 times and reduce the failure rate by more than 90%. It is recommended that enterprises establish a closed-loop management system of “inspection-analysis-optimization” and combine it with the latest IoT technology to realize intelligent operation and maintenance. For a customized maintenance plan or a list of inspection equipment, please contact our professional technical team.