CKSG Series Low-Voltage Filtering Reactors-Xinxiang Shengyuan Electric Co., Ltd.

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Product Overview

This series of dry-type iron-core reactors is designed for use in low-voltage reactive power compensation cabinets, connected in series with capacitors. When a large number of harmonic sources—such as rectifiers and AC devices—are present in the low-voltage grid, the high-efficiency harmonics they generate can severely compromise the safe operation of main transformers and other electrical equipment. By connecting the reactor in series with the capacitor, the system can effectively absorb grid harmonics, improve the voltage waveform, and boost the power factor. Additionally, this setup efficiently suppresses inrush currents during switching operations and mitigates overvoltages, thereby providing robust protection for the capacitors.

Structural Features

This reactor is available in both three-phase and single-phase versions, and both types are dry-type with an iron core. The iron core is made from high-quality oriented silicon steel laminations, with the core columns divided into evenly spaced, small segments by carefully engineered air gaps. These air gaps are separated using epoxy-laminated glass fabric spacers, ensuring that the reactor’s magnetic air gap remains stable even under operational conditions. The coil windings are crafted from high-strength electromagnetic wire. After the coil and iron core are assembled into a single unit, the assembly undergoes a rigorous manufacturing process: pre-drying followed by vacuum impregnation with H-class insulating varnish, and finally heat-curing. This meticulous process firmly bonds the coil to the iron core, significantly reducing operational noise while also providing exceptional thermal resistance. As a result, the reactor can safely operate at elevated temperatures without generating unwanted noise. Additionally, the fasteners used in the core column sections are made from non-magnetic materials, further enhancing the reactor’s performance by boosting its quality factor and minimizing temperature rise—key factors for achieving optimal filtering efficiency. Finally, all exposed components have been treated with anti-corrosion measures, and the terminal leads have undergone tinning for superior electrical conductivity and durability.

Operating environment conditions: Altitude not exceeding 1000m. (If exceeding 1000m, designs can also be customized according to user requirements.)
Operating environment temperature: -25°C to 45°C, with relative humidity not exceeding 90%. Ensure there are no harmful gases or flammable/explosive materials in the surrounding area. The environment should have adequate ventilation; if installed inside a cabinet, ensure that ventilation equipment is provided.

Performance parameters

Suitable for 400V/600V systems.
Types of reactance rates: 1%, 4.5%, 6–7%, and 12%.
Rated insulation level: 3 kV/min.

During normal operation, the reactor's temperature rise does not exceed 80 K. The reactor's noise level complies with national standards. Additionally, the reactor circuit can operate continuously under conditions where the fundamental frequency plus harmonic currents do not exceed 1.35 times the rated current.
Reactor Reactance Linearity: At 1.8 times the rated current, the ratio of the reactance value to that at the rated current must be no less than 0.95. Additionally, the difference between any two-phase reactance values of the three-phase reactor should not exceed ±2%. The temperature rating is Class H.

Installation dimensions

Product Category

Serial Number	Model Specifications	Control capacity	Reactor Reactance Ratio	External dimensions LXWXH	Installation dimensions AXB
1	CKSG-0.48-0.7-7%	10 kVAR	7%	195x100x160	110x65
2	CKSG-0.48-1.05-7%	15 kVAR	7%	195x120x160	110x80
3	CKSG-0.48-1.4-7%	20 kVAR	7%	240x130x185	130x90
4	CKSG-0.48-1.75-7%	25 kVAR	7%	240x135x185	130x105
5	CKSG-0.48-2.1-7%	30 kVAR	7%	240x150x185	130x120
6	CKSG-0.48-2.8-7%	40 kVAR	7%	280x135x280	145x100
7	CKSG-0.48-3.1-7%	45 kVAR	7%	280x140x280	145x105
8	CKSG-0.48-3.5-7%	50 kVAR	7%	280x150x280	145x110
11	CKSG-0.525-1.4-14%	10 kVAR	14%	195x130x160	110x90
12	CKSG-0.525-2.1-14%	15 kVAR	14%	240x135x185	130x90
13	CKSG-0.525-2.8-14%	20 kVAR	14%	280x135x280	145x100
14	CKSG-0.525-3.5-14%	25 kVAR	14%	280x150x280	145x110
15	CKSG-0.525-4.2-14%	30 kVAR	14%	280x160x280	145x120
16	CKSG-0.525-5.6-14%	40 kVAR	14%	310x165x270	210x125
17	CKSG-0.525-7.0-14%	50 kVAR	14%	320x175x275	210x125