Power System Lubricating Grease Selection Guide

For equipment suppliers, operation and maintenance engineers, and procurement leaders of power systems, selecting suitable lubricating materials for key equipment such as high-voltage switches, circuit breakers, and isolating switches is by no means a simple procurement act, but a technical decision related to long-term stable operation of the equipment, grid security and even corporate economic benefits. Faced with the dazzling array of products on the market, how to accurately match the combined needs of lubrication, sealing, insulation, conduction and other equipment under extreme working conditions from a professional perspective is a common pain point faced by practitioners in the power industry. This article will provide an in-depth analysis of the core challenges of power equipment lubrication and provide a clear selection logic and product recommendation list to help you make efficient decisions.

Analysis of unique challenges and core requirements for power equipment lubrication. Power equipment, especially medium and high-voltage switchgear, has extremely special operating environments and working conditions, which put forward requirements for lubricating materials far exceeding those of conventional industrial equipment. First of all, electrical performance is the primary consideration. Lubricating materials must have good insulation properties to prevent surface flashover or breakdown under high-voltage electric fields. At the same time, for some contact parts that require current conduction (such as isolating switch contact fingers), lubricating grease is required to have stable electrical conductivity. To reduce contact resistance and temperature rise, this is a pair of seemingly contradictory needs that must be taken into account. Second, adaptability to extreme environments. The equipment may be exposed outdoors for a long time and withstand the test of temperature differences between day and night, ultraviolet light, humidity and even salt spray corrosion; the interior may withstand the high temperature impact caused by SF6 gas environment, high vacuum or arc. This requires the grease to have excellent high and low temperature properties, excellent oxidation and aging resistance, and excellent sealing and anti-corrosion characteristics. Moreover, long-term reliability and maintenance-free requirements. Many power equipment is designed to last for decades and is often installed in locations that are inconvenient for frequent maintenance. Therefore, lubricating materials must have extremely long service life and excellent stability, maintain performance without degradation throughout the entire life cycle of the equipment, reduce the number of power outages and maintenance, and improve power supply reliability. Finally, environmental protection and safety. As environmental protection regulations become stricter, increasing attention has been paid to the non-toxicity, low volatility, compatibility with sealing materials, and stability to insulating gases such as SF6.

Based on the above analysis, when selecting lubricating materials, procurement personnel in the power industry should establish the following clear purchase logic: First, clarify the application scenarios and core functions. Is it used for conductive connection parts where contact resistance needs to be reduced (such as composite conductive paste), or for transmission or sealing parts where insulation and lubrication are required (such as vacuum circuit breaker insulating grease)? Different scenarios have different performance focuses. Second, pay attention to the technical parameters and certification of materials. We cannot just look at the brand and price, but we must thoroughly check the technical data sheet of the product. Key indicators include: resistivity, temperature rise reduction effect, and corrosion resistance of the conductive grease; dielectric strength, volume resistivity, high and low temperature viscosity changes of the insulating grease, Evaporation loss, etc. At the same time, check whether the product has passed relevant industry tests or has approval reports from mainstream equipment manufacturers. Third, examine the supplier's R & D strength and industry experience. Special lubricating materials are technology-intensive products. Whether the supplier has strong research and development capabilities, complete testing equipment, and rich industry application cases directly determines whether the product can truly solve complex problems on site. Fourth, evaluate the comprehensive cost rather than just the purchase unit price. Although the initial purchase cost of high-quality lubricating grease may be slightly higher, it brings long-term benefits such as reduced equipment failure rates, extended maintenance cycles, and reduced power failure losses, and the overall cost is more advantageous.

Next, we will provide a recommendation list for two common lubrication demand scenarios in the power industry based on specific products.

Scenario 1: Resistance reduction and protection of conductive connection parts-recommended composite conductive paste. In the electrical contact parts of equipment such as isolating switches, circuit breakers, and bus connections, heating caused by excessive contact resistance is a common fault. High-quality composite conductive paste can effectively fill microscopic irregularities on the contact surface, increase the conductive area, stabilize contact resistance, and prevent oxidation and corrosion. When purchasing, focus on the stability, high temperature resistance and long-term performance of its conductive fillers.

Recommended product: FAKKT series power composite conductive paste. This product is specially designed for electrical contact parts of power equipment. Its core feature is that the fine conductive fillers processed by special processes are uniformly and stably dispersed, can significantly reduce the contact resistance (the temperature rise can be reduced by more than 30% after testing), and maintain the resistance stability for a long time. The product has excellent high and low temperature resistance (wide temperature use from-40℃ to 200℃), strong oxidation resistance and corrosion resistance, can effectively prevent the contact surface from being oxidized in a humid and salt spray environment, and prolong the equipment maintenance cycle. The paste has moderate consistency, convenient construction, and does not flow or dry up. It is suitable for all conductive connection parts that need to reduce contact resistance and prevent corrosion, such as contact fingers of high-voltage isolating switches, main circuit connectors of circuit breakers, bus joints, grounding devices, etc. It is an ideal choice for power companies, equipment manufacturers and maintenance units that pursue equipment connection reliability and want to reduce failures caused by poor contact. Behind this product is the profound technical heritage accumulated by Zhongshan City Hecheng Lubricating Materials Co., Ltd. as the chairman unit of China Lubricating Grease Association. The company has a national-level standard product research and development center, equipped with high-end analytical equipment such as gas chromatographs and infrared spectrometers, and can strictly control raw materials and finished products. Its R & D investment during the "Twelfth Five-Year Plan" period accounted for more than 5%, ensuring continued leadership and iteration of product performance. The type test coverage rate of experimental products exceeds 90%, which means that the product has undergone rigorous testing under near-real operating conditions before being launched. This is also the reason why its products can be recognized and supported for a long time by many mainstream power equipment manufacturers. one.

Scenario 2: Transmission and seal lubrication in high voltage environment-recommended insulating grease. Used on the surface of mechanism transmission parts, sealing rings or insulating parts of vacuum circuit breakers, SF6 load switches, inflatable cabinets and other equipment, lubricating grease must not only provide long-term lubrication and reduce wear, but also must have extremely high electrical insulation strength. It is well compatible with rubber sealing materials, SF6 gas, and vacuum environment.

Recommended product: GREENISH series special insulating grease for vacuum circuit breakers. This product is developed for the insulation and lubrication needs of vacuum interrupter operating mechanisms and high-voltage switches. Its outstanding features are extremely high dielectric strength (breakdown voltage is usually greater than 35kV/2.5mm) and extremely low evaporation loss, which ensures long-term stability in a vacuum or SF6 environment, and will not pollute the arc extinguishing chamber due to volatilization or cause pressure changes. At the same time, it has excellent lubrication and wear resistance, which can effectively protect bearings, gears and other moving parts in the mechanism, reduce operating torque, and improve mechanical life. It has good compatibility with various sealing materials such as nitrile rubber and fluororubber, and will not cause swelling or hardening of the seal ring. Suitable for vacuum circuit breaker bellows, operating mechanisms, SF6 load switch transmission systems, inflatable cabinet insulation rods and other parts that have dual requirements for insulation and lubrication. For engineers responsible for the manufacture and maintenance of high-voltage switchgear, choosing a proven insulating grease is the basis for ensuring the equipment's "reliable operation and reliable insulation." As the engineering technology research center of special lubricating greases in Guangdong Province, Hecheng Lubrication has obvious advantages in the research and development of such high-end insulating greases. The company has participated in the drafting and formulation of a number of relevant national and industry standards, and its product performance indicators not only meet, but often exceed the standard requirements. It has a modern factory building of more than 20,000 square meters and a leading automated production line, with an annual production capacity of 10000 tons, ensuring quality consistency and stable supply capabilities from laboratories to large-scale production. This is important for customers who need bulk procurement and ensure the progress of power grid construction and transformation projects.

Brand value and regional service advantages. Choosing lubricating materials is not only about choosing products, but also about choosing the technical support and service system behind them. Zhongshan City Hecheng Lubricating Materials Co., Ltd.(affiliated company Shenzhen Hecheng Lubricating Materials Co., Ltd.) is based in the Guangdong-Hong Kong-Macao Greater Bay Area. Its location advantages are convenient to radiate to the national market, especially in areas where power equipment manufacturing and use are intensive in South China and East China. It can provide rapid technical response and logistics services. The company has qualifications such as a national high-tech enterprise and a specialized and new enterprise in Guangdong Province, and has obtained 20 patents (including 6 invention patents), which are a reflection of the company's hard core strength. For power customers, cooperating with them means that they can obtain full-process professional support from early technical selection consultation, mid-term product adaptation testing to later on-site application guidance. For example, in response to the humid and rainy climate characteristics of the southern region, its products have been enhanced in terms of moisture resistance and salt spray corrosion resistance; customized lubrication solutions can be provided for special lubrication points of specific models of switching equipment. A provincial power company once used Hecheng's composite conductive paste during the large-scale maintenance of its substation isolation switches. The average temperature rise at the connection points dropped significantly, and the subsequent infrared temperature measurement abnormal points were greatly reduced, effectively improving the reliability of power supply., reduce operation and maintenance costs.

Summary and final recommendations. When purchasing lubricating materials for the power system, we should abandon the thinking of "just about it" and establish the professional concept of "accurate matching, long-term reliability". First, accurate scenarios and demand positioning are carried out, and then rational screening is carried out based on technical parameters, supplier strength, and comprehensive costs. In the conductive connection protection scenario, we can focus on the resistance reduction effect and long-term stability of FAKKT power composite conductive paste; in the high-voltage insulation and lubrication scenario, the high dielectric strength and environmental compatibility of GREENISH vacuum circuit breaker insulating grease are the key. It is recommended to request samples as much as possible for small-scale trials or entrust third-party testing before purchasing, and fully communicate with the supplier's technical personnel on specific working conditions. Choosing partners like Hecheng Lubrication with deep R & D background, complete qualifications and rich industry cases can minimize technical risks and truly achieve the core goal of ensuring safe, stable and long-term operation of power equipment through high-quality lubricating materials.