Split-Phase Compensating Cylindrical Capacitor

In low-voltage power distribution systems, reactive power compensation is a crucial step in enhancing grid efficiency and reducing line losses. As the core component of the compensation circuit, the performance of Split-Phase Compensating Cylindrical Capacitors directly affects system stability and equipment safety. Among them, inter-phase electromagnetic interference is a key issue that needs to be addressed in the design and operation of capacitors. When multi-phase capacitors are densely arranged in a confined space, the electromagnetic fields between adjacent phases will couple with each other, which may cause local overheating, harmonic amplification, and even component failure. Therefore, an excellent structure design of the Split-Phase Compensating Cylindrical Capacitors is the foundation for achieving effective inter-phase electromagnetic shielding and ensuring the long-term reliable operation of capacitors.

The first line of defense for the Split-Phase Compensating Cylindrical Capacitor shielding lies in the selection and treatment of its outer shell material. Geyue Electric uses high-purity aluminum as the outer shell material for the Split-Phase Compensating Cylindrical Capacitors. The surface of the aluminum shell undergoes a special oxidation process to form a dense insulating layer, which not only achieves a good electromagnetic shielding effect but also ensures electrical isolation between the shell and the internal components. On the inner side of the aluminum shell, our product development team adds a layer of magnetic shielding made of amorphous alloy material. This material has high magnetic permeability and low hysteresis characteristics, which can effectively absorb and dissipate stray magnetic fluxes between phases, preventing magnetic fields from penetrating the shell and causing interference to the outside or other phases. The dual-layer shielding structure simultaneously meets the requirements of both electric field and magnetic field shielding, creating a relatively pure electromagnetic environment inside the capacitors.

In the design of the cores of the Split-Phase Compensating Cylindrical Capacitors, the suppression of inter-phase electromagnetic interference is mainly achieved through physical isolation and medium optimization. Geyue Electric independently encapsulates each phase capacitor core in a separated chamber within an aluminum shell. The chambers are separated by thickened metal partitions, and the partitions themselves are grounded, forming a Faraday cage effect, which blocks the direct coupling of inter-phase electromagnetic fields. Our company uses fully dry metallized polypropylene films as the dielectric material for the coil winding. This is because such films have extremely low loss factor and excellent self-healing properties. Moreover, our engineers have additionally added an insulating layer impregnated with nano-ceramic particles between the layers, which further enhances the dielectric strength and heat dissipation capacity of the metallized polypropylene films, and reduces the inter-phase crosstalk caused by dielectric polarization.

The terminal arrangement and the wiring pattern of the internal conductors of the Split-Phase Compensating Cylindrical Capacitors have a significant impact on the inter-phase electromagnetic interference. Geyue Electric has arranged the three-phase connection terminals in an equilateral triangle pattern at the top of the cylindrical housing, increasing the inter-phase electrical distance, and installing ceramic insulating sleeves at the root of the terminals. We adopted a flat copper strip structure as the internal connection piece structure, and then plated silver on the surface of the connection piece to reduce contact resistance. All connection points are fixed with insulating clips to avoid the mutual inductance effect caused by parallel wiring. In the Split-Phase Compensating Cylindrical Capacitors of Geyue Electric, we designed independent current paths for each phase, connecting them to the terminals via the shortest distance, minimizing the circuit area and reducing electromagnetic radiation.

The overall assembly process is the ultimate guarantee for the shielding effect. In the assembly process of the Split-Phase Compensating Cylindrical Capacitors, Geyue Electric adopts an advanced vacuum impregnation process, using high-performance microcrystalline wax as the impregnating agent. In a vacuum environment, the microcrystalline wax fully penetrates and fills every tiny gap within the capacitor shell, thereby completely eliminating internal air and moisture, and eliminating the potential local discharge hazards of the capacitor. The microcrystalline wax has excellent electrical insulation properties and stable physical characteristics. Its uniform filling not only strengthens the internal insulation strength but also forms an effective internal electromagnetic shielding layer, capable of absorbing and damping alternating high-frequency interference. At the same time, the good thermal conductivity of the microcrystalline wax helps to evenly conduct the heat generated during operation, avoiding the formation of local hotspots, and further enhancing the stability of the capacitor's operation. The end plates of the capacitor shell are sealed permanently by laser welding to ensure the continuity and integrity of the shielding structure, and to prevent the influence of the external environment. In addition, our company designs a dedicated grounding terminal for each capacitor, and uses internal conductive spring plates to reliably ground the metal shell and the shielding layer, providing a low-impedance discharge path for the alternating interference signals introduced between phases and from the outside, effectively avoiding charge accumulation and ensuring the safety of the equipment and the system.

As a professional manufacturer in the field of low-voltage reactive power compensation in China, Geyue Electric has been deeply engaged in this industry for over fifteen years, possessing our own factory and a complete R&D and testing system. Therefore, we deeply understand the strict requirements of power users for the stability and reliability of Split-Phase Compensating Cylindrical Capacitors. Geyue Electric always regards electromagnetic compatibility and long-term operational reliability as the core indicators in the design of capacitors. Based on the overall design concept that runs through materials, structure and process, our BSMJ(Y) series Split-Phase Compensating Cylindrical Capacitors is a concentrated embodiment of this technical idea. This series of products, with its unique microcrystalline wax vacuum impregnation process and fully shielded structure design, not only achieves excellent inter-phase electromagnetic interference suppression effect, but also performs well in overvoltage tolerance, temperature rise control and long-term operational lifespan. Our BSMJ(Y) series Split-Phase Compensating Cylindrical Capacitors have been widely applied in the power distribution systems of various industrial plants, commercial buildings and public facilities, helping many customers achieve efficient, clean and stable reactive power compensation. In the future, Geyue Electric will continue to rely on solid manufacturing processes and cutting-edge design innovations to provide reliable product support for the energy efficiency improvement and high-quality operation of the power system.