CKSG Series Reactance Rate 7% Series Reactor

Why does reactor need to be connected in series with capacitors instead of in parallel?

During our daily interactions with customers, the engineers of Geyue Electric often encounter a classic novice-level question: In low-voltage reactive power compensation systems, why are CKSG Series Reactance Rate 7% Series Reactors always used in series with capacitors rather than in parallel? This seemingly simple connection method actually conceals the core wisdom for ensuring the safe, stable and economical operation of the power system. Today, Geyue Electric will, from the perspective of a "power system guardian", provide you with an in-depth analysis of the reasons behind it.

Role Positioning: From "Independent Combat" to "Coordinated Defense"

First of all, we need to truly understand the fundamental roles of capacitors and reactors in the power grid. The capacitor is like a "power supply soldier", whose main task is to generate capacitive reactive power, directly compensating for the reactive power consumed by inductive loads (such as motors, transformers), thereby improving the power factor of the entire power system, reducing line losses and energy waste.

The reactor, specifically a CKSG Series Reactance Rate 7% Series Reactor in this context, serves as a "filter" and a "buffer". If it is wrongly connected in parallel with the capacitors, the reactor will be directly connected to the busbar like the capacitors, and it will absorb inductive reactive power on its own. This not only fails to provide reactive power compensation but actually increases the reactive load of the system, going against the basic target of compensating reactive power and improving the power factor. At this point, the role of the reactor will be restrained to very limited smoothing or filtering, and it will be completely unable to provide direct protection for the capacitors.

Once connected in series with the capacitors, the CKSG Series Reactance Rate 7% Series Reactor transforms from an "independent combat unit" to the "exclusive partner" of the capacitors. It will act like a loyal guard, forming a unified "LC series circuit" with the capacitors and then being connected to the power grid. This connection relationship serves as the structural pillar for the realization of all subsequent protection functions.

Core Missions: Harmonic Amplification Suppresion and Dangerous Currents Filtering

In modern power grids, the presence of non-linear loads such as frequency converters and rectifier equipment can generate a large number of harmonic currents, which is one of the main "culprits" threatening the safe operation of power equipment. When only capacitors are connected to the low-voltage reactive power compensation system, the capacitive reactance of the capacitors will decrease as the frequency of the harmonic currents in the power grid increases. The low capacitive reactance precisely provides a low-impedance path for high-order harmonic currents, resulting in abnormal amplification of the harmonic currents. In severe cases, the influx of harmonic currents can cause the capacitors to overheat, even explode, and pollute the entire power grid.

The addition of a CKSG Series Reactance Rate 7% Series Reactor can completely change this vicious cycle where the dangerous harmonic current keeps growing. The inductive reactance of the series reactor increases as the frequency of the harmonic current existing in the power grid rises. When the series reactor is connected in series with the capacitors, the impedance (the hindering effect on the current) of both the series reactor and the capacitors to the harmonic varies in opposite trends with the frequency. Carefully designing the inductance (or reactance rate) of the series reactor can make it possible for this LC series circuit to present a high impedance to specific harmonics (such as 5th harmonic, 7th harmonic), like setting up a solid "filter" for the dangerous harmonic currents to filter these dangerous currents out the compensation branch. This effectively prevents harmonic resonance and harmonic amplification in the power system, protecting the capacitors themselves and purifying the power grid environment.

Key Guarantee: Resistance to Closing Surge Current and operational overvoltage

When capacitors are connected to the power grid, a huge instantaneous current usually occurs, which is known as the closing surge current. The value of the closing surge current can be as much as several tens of times the rated current of the capacitors that is being connected. Such frequent switching operations will seriously damage the dielectric life of the capacitors and the contacts of the switching device.

At this moment, the CKSG Series Reactance Rate 7% Series Reactor can function as a "buffer" for the current. The inductance characteristic of the series reactor determines that the current flowing through the reactor itself cannot change abruptly, thereby significantly suppressing and delaying the peak and steepness of the closing surge current, allowing the current to rise smoothly. Similarly, when removing a certain capacitor branch, the reactor can also absorb part of the electromagnetic energy, suppressing the possible operational overvoltage, providing another layer of reliable buffering protection for the capacitors and the entire compensation system.

Geyue Electric’s Solutions: Meticulous Protection of System Security

Geyue Electric fully understands the responsibility of reactors as "safety guards", and therefore has devoted all of our technical staff's efforts to the design and manufacture of the CKSG Series Reactance Rate 7% Series Reactors. To anchor the accuracy and stability of a 7% reactance rate, we use high-quality imported silicon steel sheet cores and adopt a unique core segmenting and air gap curing process to guarantee that the inductance remains unchanged over a long period of operation. To withstand the severe heat challenges in a harmonic environment, we select F/H grade high-temperature insulating materials and employ a vacuum impregnation process to firmly cure the coils and cores together. This not only safeguard the extremely low temperature rise and silent operation of the reactors, but also endows them with persistent and stable filtering performance in high-temperature environments.

Our CKSG Series Reactance Rate 7% Series Reactor is not merely an ideal component that conforms to theoretical principles; it is also the crystallization of our company's advanced manufacturing philosophy. From rigorous electromagnetic design, precise processing and assembly, to comprehensive factory testing, every step adheres to the belief that "reliability is value". We are proud to be able to provide market with reactors that are smaller in size, lighter in weight, more efficient, and with exquisite appearance. They have been widely applied in various industrial and commercial power distribution systems and have become the reliable foundation in the no-load compensation and harmonic control solutions of many users.

Therefore, when you are planning or upgrading a low-voltage reactive power compensation system, choosing the right technical path and reliable equipment partners are equally important. Geyue Electric is willing to provide professional CKSG Series Reactance Rate 7% Series Reactors and complete reactive power compensation solutions, to become a solid support for the safe, efficient and stable operation of your power system. Let's work together, starting from every correct connection, and jointly build better power quality.