Product Overview

The CKSC Series Dry-Type Iron Core Reactor is a critical component for reactive power compensation systems in low-voltage 0.4kV networks and medium-voltage 6kV / 10kV power systems. Installed in series with shunt capacitor banks, it effectively suppresses high-order harmonics, limits capacitor switching inrush current, improves voltage waveform stability, and protects sensitive electrical equipment.

Widely used in industrial plants, substations, commercial buildings, renewable energy systems, hospitals, and data centers, the CKSC reactor provides long-term reliable operation without the maintenance risks associated with oil-immersed reactors. Its dry-type epoxy-cast structure offers high safety, excellent insulation performance, and outstanding resistance to harsh operating environments.

Working Principle

When a capacitor bank is connected to the power system, high inrush current may occur and existing harmonic distortion can be amplified. The CKSC reactor is connected in series with the capacitor bank to form a tuned LC filter circuit. By selecting the proper reactance rate such as 5%, 6%, 7%, or 12%, specific harmonic orders—especially the 5th and 7th harmonics—can be effectively suppressed, preventing harmonic circulation in the distribution network.

Its segmented air-gap iron core structure ensures stable inductance throughout the service life, maintaining reliable harmonic filtering performance even under continuously changing load conditions.

Main Features

Segmented Air-Gap Iron Core

The core column adopts a segmented structure with multiple precision air gaps insulated by epoxy fiberglass boards. This design prevents magnetic saturation under high harmonic current conditions and guarantees stable inductance for decades of continuous service.

Vacuum Epoxy-Cast Coil

The winding uses vacuum pressure epoxy casting technology and is reinforced with fiberglass mesh on both internal and external surfaces. This greatly improves mechanical strength, moisture resistance, insulation reliability, and partial discharge performance while enhancing resistance to short-circuit impact and thermal cycling.

Low Noise Operation

High-quality adhesive bonding is applied to silicon steel lamination end faces, while vibration-damping pads are installed at both coil ends. Combined with the rigid cast-resin structure, operating noise remains well within IEC and national standards.

Continuous Overload Capacity

The CKSC reactor supports continuous operation at 1.35 times rated current, offering a strong safety margin for systems exposed to frequent harmonic fluctuations and heavy-duty industrial loads.

Maintenance-Free Dry-Type Design

With natural air cooling and no oil-filled components, the reactor eliminates risks of oil leakage, fire hazards, and regular oil inspection requirements. Its sealed epoxy construction resists dust and moisture, making it suitable for enclosed switchgear cabinets and open substation installations.

Technical Specifications

Reactance Rate Selection Guide

Choosing the correct reactance rate is essential for effective harmonic suppression and capacitor bank protection.

For complex systems with multiple harmonic sources, combining reactors tuned to different harmonic frequencies is recommended. Our engineering team can provide harmonic analysis and customized reactor selection based on actual site conditions.

Applicable Standards

All CKSC reactors are manufactured under ISO 9001 quality management systems and undergo strict factory testing including inductance verification, temperature rise testing, insulation resistance measurement, and power frequency withstand testing before delivery.

Applications

Industrial manufacturing plants use CKSC reactors to protect variable frequency drives, rectifiers, and capacitor banks from severe harmonic distortion and unstable reactive power loads.

Utility substations install CKSC reactors in 6kV and 10kV compensation systems to improve power factor, stabilize voltage, and enhance grid reliability.

Commercial buildings integrate these reactors into low-voltage compensation cabinets with APFC systems for stable and efficient power distribution.

Solar farms and wind power systems use CKSC reactors to suppress inverter-generated harmonics and ensure compliant grid connection.

Hospitals and data centers rely on low-THD power supply to protect highly sensitive equipment and maintain uninterrupted operation.

Model Designation

CKSC – [Capacity kvar] / [Voltage kV] – [Reactance Rate %]

Example: CKSC-30/10-6%

This means 30 kvar capacity, 10kV system voltage, and 6% reactance rate.

Ordering Information

For accurate quotation and technical matching, please provide your system rated voltage, operating frequency, required capacity in kvar, rated current, target harmonic order or reactance rate, installation type, altitude, ambient temperature, and any special requirements such as terminal direction, enclosure protection grade, dynamic stability current, or seismic performance requirements.

Why Choose CKSC Series Dry-Type Reactor

Power quality problems caused by harmonics and reactive power imbalance lead to equipment failure, production downtime, utility penalties, and reduced system efficiency. The CKSC Series reactor solves these issues at the source by providing reliable harmonic suppression and stable reactive power compensation.

With maintenance-free dry-type construction, strong overload capability, stable long-term inductance, and full compatibility with both low-voltage and medium-voltage systems, the CKSC reactor offers one of the most cost-effective solutions for building a safer, cleaner, and more efficient power distribution network.

For technical consultation, customized specifications, and project support, please contact our engineering team with your site power quality report and single-line system diagram.