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The application of transformateurs de puissance runs through the core scenes of industrial production, urban distribution network, and new energy projects, and the quality of decision-making for fault handling directly affects your return on investment.
This article will clearly break down the boundary between repairable and non-repairable faults, and provide you with a scientific decision-making guide by combining the product characteristics and service advantages of Chuanli, so that you will no longer be passive when a fault occurs.
The application of transformateurs de puissance is diverse, whether it is the step-up transmission of power plants, the high-voltage power supply of industrial parks, or the distribution guarantee of commercial buildings; it is the core hub. For the buyer, what you purchase is not only a piece of equipment, but also the “power supply lifeline” of the project. If the fault is not handled properly, it may cause the production line to stop for several days, commercial places to be closed, and even cause safety accidents. The indirect losses caused are far greater than the value of the equipment itself.
This kind of fault is mostly a local problem, which has not damaged the core components, such as the winding and iron core. The repair cycle is short, and the cost is low. After repair, the equipment can restore its original performance. It is the most cost-effective way to deal with it.
The transformer oil is the core medium of insulation and cooling. After long-term use, it may cause the dielectric loss to increase and the insulation strength to decrease due to the mixing of water, the accumulation of impurities, or oxidation, which is manifested as an abnormal increase in equipment temperature and a darkening of the oil color.
Cooling fan failure, oil pump failure, heat sink blockage, and other faults will cause equipmentto have poor heat dissipation and temperature surge, which will affect the stability of operation.
The surface of the casing is dirty, slightly cracked, or the insulation is aging, which may cause local discharge, but it does not damage the internal insulation structure.
Poor contact, sticking, or wear on the tap switch can cause abnormal voltage regulation, hot contacts, and is common in long-term, frequent regulation scenarios.
A slight oil leak at the tank weld, flange interface, or valve is mainly caused by the aging of seals and loose bolts, but it has not caused damage to the internal equipment.
This kind of fault has seriously damaged the core components, the repair cost is high and the risk is large, and it may even leave safety hazards, replacing the equipment is a more stable and economical choice:
· Short-circuiting of the power grid, long-term overload, and other causes lead to the burning, deformation, and breaking of the winding, which is one of the most serious internal faults.
· Risk analysis: aging is an irreversible process. Maintenance can only temporarily solve local problems and cannot extend the overall life of the equipment. Instead, it will increase the frequency of failures and maintenance costs, and even cause sudden shutdowns during critical periods.
| Fault Type | Repair Feasibility | Repair Cycle | Repair Cost as a Percentage of New Equipment | Core Risk | Chuanli Handling Recommendations |
| Transformer Oil Contamination and Deterioration | Repairable | 1-3 days | 5%-10% | Reduced insulation strength | Oil purification or partial oil replacement |
| Cooling System Fault | Repairable | 1-2 days | 8%-15% | Equipment overheating shutdown | Replace parts + clean the cooling system |
| Bushing Defects and Insulation Surface Problems | Repairable | 2-4 days | 10%-20% | Partial discharge | Clean, repair, or replace the bushing |
| Tap Switch Fault | Repairable | 3-5 days | 15%-25% | Unstable voltage | Contact maintenance or switch replacement |
| Minor Oil Leakage and Seal Failure | Repairable | 1-2 days | 3%-8% | Oil leakage and contamination | Replace seals + tighten/weld repair |
| Severe Winding Deformation or Short Circuit Damage | Unrepairable | – | 60%-80% | Secondary fault risk | Replace winding or entire equipment |
| Core Damage and Insulation Burnout | Unrepairable | – | 50%-70% | Energy consumption spike | Replace with new equipment immediately |
| Fire, explosion, or arc flashover damage | Unrepairable | – | – | Safety accident risk | Replace equipment immediately |
| Severe aging and end of life | Unrepairable | – | 30%-50% | Sudden downtime risk | Replace with new, high-efficiency, energy-saving equipment |
The 10kV oil-immersed transformer of a certain chemical enterprise has been running for 10 years, and there is slight oil leakage and cooling fan failure, which was originally intended to be repaired at a low price. After inspection by Chuanli, it was found that the insulating oil had seriously deteriorated and the winding insulation had slightly aged, which may cause a short circuit in the winding within 6 months after partial repair, resulting in a loss of tens of thousands of yuan.
Chuanli gave three solutions for this:
Maintenance (30,000 yuan, 3 days): Replace seals, fan + oil quality purification, annual maintenance cost 5,000 yuan;
Refurbishment (80,000 yuan, 15 days): Winding rewinding + insulation renewal, extending life by 5-8 years;
Replacement (180,000 yuan, 7 days): High-efficiency transformer with the same capacity, energy efficiency improved by 20%, annual electricity saving of 30,000 RMB, 5-year warranty.
The buyer eventually chose to replace it, and after one year of operation, the saved electricity cost covered part of the equipment difference, and there were no faults, completely getting rid of the frequent maintenance trouble. This shows that fault handling should not only consider the immediate cost, but should also consider the equipment condition, subsequent cost, and risk, and make a comprehensive decision.
As a buyer, when faced with the failure of transformateurs de puissance, the core decision logic is: first judge the type of failure, and then comprehensively weigh the use period of the equipment, the cost of maintenance, and the loss of downtime. Repairable faults should be repaired quickly to avoid the expansion of minor faults; If the fault is irreparable, it should be replaced decisively, and do not leave safety hazards due to the desire to save money in the short term.
The stable operation of transformateurs de puissance is the basis for the efficient operation of the project. By choosing Chuanli, you not only get a piece of equipment, but also a full process guarantee from selection, use to fault handling, so that you can always take the initiative in the face of faults and minimize losses.
Q1: Does Chuanli provide power transformer repair services? Is there a warranty after the repair?
A: Provide. Chuanli has a professional maintenance team and original spare parts, which can undertake transformateur de puissance maintenance services throughout the country. The repaired parts enjoy a 6-12 month warranty, and similar problems can be repaired again free of charge during this period.
Q2: How can I determine whether my transformer needs repair or replacement? Can Chuanli provide testing services?
A: Sure. Chuanli provides free fault detection services. Technicians will evaluate the severity of the fault and the aging state of the equipment through oil quality analysis, insulation test and partial discharge detection, and provide you with the most economical treatment suggestions to avoid misjudgment.
Q3: How to avoid frequent repairable faults in power transformers?
A: The core is to choose reliable brands and do daily maintenance. The transformateur de puissance de Chuanli adopts high-quality materials and precise technology, which can reduce the occurrence of faults; At the same time, we will provide you with a detailed maintenance manual and training to guide you to regularly check the oil quality, cooling system, casing, and other key parts to avoid failures in advance.
