Three-Phase Capacitor for Reactive Power Compensation

In the low-voltage reactive power compensation system, the selection of the connection method for the Three-Phase Capacitors for Reactive Power Compensation directly affects the compensation effect and the lifespan of the equipment. Geyue Electric, as a professional compensation equipment manufacturer, sincerely recommends to users to choose the most suitable connection scheme based on the characteristics of the power grid. The correct connection method not only can fully utilize the performance of the capacitor but also can effectively avoid potential risks brought by power grid harmonics.

The delta connection method is suitable for three-phase balanced systems with a voltage level of 380V and low harmonic content. Because the delta connection method enables the Three-Phase Capacitors for Reactive Power Compensation to directly withstand the line voltage of the system, it allows the capacitors to output a larger reactive power capacity. The BSMJ(Y) series Three-Phase Capacitors for Reactive Power Compensation produced by Ge Yue Electric adopt an enhanced structural design, and the terminal connection strength fully meets the mechanical requirements of the delta connection method. When the total harmonic distortion rate of the current in the system is less than 5%, we recommend that users prefer to use the delta connection method to connect the capacitors.

The star connection is particularly suitable for industrial environments with significant harmonic interference. This is because the neutral point formed by the star connection effectively diverts triple harmonic currents and their multiples. Geyue Electric's BSMJ(Y) series Three-Phase Capacitors for Reactive Power Compensation incorporate a special internal structural design to ensure uniform current distribution under star configuration. When power system analysis detects elevated levels of triple harmonics, engineering technicians should opt for the star connection scheme.

The rated voltage of the Three-Phase Capacitors for Reactive Power Compensation must be in a matching relationship with the connection method. For the delta connection, the rated voltage of the capacitor should be no less than 450V, while for the star connection, the rated voltage should be at the 250V voltage level. The technical team of Geyue Electric suggests that users reserve a 10% voltage margin when selecting the model of the capacitors. When selling our BSMJ(Y) series products, our company will provide a complete voltage level configuration plan, and these configuration plans have all been certified by the National Electrical Product Quality Supervision and Inspection Center.

The modern industrial power grid is generally plagued by harmonic pollution, which requires users to adopt harmonic-specific wiring strategies when connecting Three-Phase Capacitors for Reactive Power Compensation. When there is a significant fifth harmonic in the power system, capacitors can still be connected in a triangular configuration to the reactive power compensation line, but they need to be connected in series with appropriate reactors to suppress harmonic amplification and protect the capacitors from overload damage. The harmonic measurement service provided by Geyue Electric can help users accurately and effectively determine the harmonic pollution status of the power grid. Our engineering database contains the harmonic spectrum characteristics of hundreds of typical industries, and these diverse data samples can offer important references for the selection of capacitor wiring methods.

The selection of capacitor connection also needs to take into account the convenience of on-site installation and long-term maintenance. Geyue Electric, based on our long-term on-site low-voltage reactive power compensation experience, can conclude that during the maintenance of capacitor units, the reactive power compensation system using the star connection method with each phase being an independent single-phase circuit is easier to maintain than the reactive power compensation system using delta connection method with three phases connected end-to-end to form a closed loop and mutually dependent three-phase circuit. The "independence" of the star connection method enables maintenance work to be carried out in a "point-to-point" manner, achieving precise maintenance and minimizing the impact on the system. While the "interconnection" of the delta connection method requires a "surface"-level overall disassembly, the operation is more cumbersome and will completely interrupt the compensation function of this circuit. Geyue Electric's Three-Phase Capacitors for Reactive Power Compensation adopt standardized interface design, and our installation team has accumulated rich experience in various connection scenarios. The product manual clearly indicates the operation specifications for different connections, and these specifications have been verified through long-term practice.

The comprehensive technical service system established by Geyue Electric can provide users with professional guidance throughout the process of reactive power compensation. Our engineering team can recommend the optimal capacitor connection scheme based on the on-site power quality test report of the users. All the Three-Phase Capacitors for Reactive Power Compensation we manufacture come with detailed wiring diagrams, which clearly and precisely mark the key points of wiring under different working conditions. Our regular technical training sessions also offer users the opportunity to deeply study the applicable conditions of various wiring methods, and have received unanimous praise from our customers.