CHKC-N5 Series (Dedicated for JP Cabinets) Smart Integrated Power Capacitor Compensation Device-Xinxiang Shengyuan Electric Co., Ltd.

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Product Overview

The CHKC series of intelligent low-voltage power capacitors is an innovative reactive power compensation device that integrates compensation, communication, and multi-fault protection functions. Commonly referred to as the "Intelligent Capacitor," it complies with the relevant provisions outlined in GB/T 15576-2020, "Low-Voltage Complete Sets of Reactive Power Compensation Devices," regarding electrical clearances, creepage distances, insulation strength, safety protection, and short-circuit current sampling and control circuits.

The intelligent capacitor control system uses a high-speed chip to采集 AC current signals, coupled with a zero-crossing switching device that minimizes stress on the capacitor, thereby extending its lifespan and reducing the impact of inrush currents on the power grid. The capacitors themselves feature polypropylene metalized film technology with thickened zinc-aluminum edges, offering excellent self-healing capabilities, minimal capacitance degradation, superior shock resistance, and an exceptionally long service life. Additionally, the adoption of communication-based multi-unit control significantly enhances the overall reliability of the system.

The intelligent capacitor features multiple protection functions, including overcurrent, power failure, harmonic distortion, overheating, pressure overload, and automatic trip in case of short circuits. By integrating protection, switching, and compensation into a single unit, its compact design significantly reduces the overall footprint—allowing more high-capacity intelligent capacitors to be installed within the same capacitor cabinet. This not only streamlines installation time but also makes future capacity expansions easier and more convenient. These intelligent capacitors are ideal for automatic reactive power compensation in centralized systems, localized applications, and pole-mounted lines. Each unit comprises a miniature circuit breaker, an AC signal sampling circuit, CPU-based control, zero-cross switching technology, communication modules, and self-healing power capacitors. With their standardized, modular, and building-block-style installation approach, they generate minimal heat and can be easily upgraded or replaced as needed.

Technical specifications

Altitude: ≤2000m;
Ambient temperature: -25~45℃ (at 25℃), relative humidity ≤80%
Environmental requirements: No harmful gases, no conductive or explosive dust, and no severe mechanical vibrations.
Rated voltage: 380V ±20%, 50Hz ±5%
Capacitor capacitance degradation: ≤1% per year
Switch lifespan: 300,000 cycles
Power consumption: ≤6W
Control Method: RS485 Communication, RJ11 Interface

A capacitor cabinet can accommodate more high-capacity smart capacitors, reducing installation time and making expansion easier. It is suitable for automatic reactive power compensation in centralized, on-site, and pole-mounted distribution lines. The smart capacitor unit consists of a miniature circuit breaker, AC signal sampling circuit, CPU control system, zero-crossing switching device, communication module, and self-healing power capacitors. Designed with standardization, modularity, and a building-block installation approach, it generates minimal heat and allows for simple capacity upgrades or component replacements.

Application Areas

This capacitor compensation device provides a solution to improve the power factor of power supply and enhance grid efficiency. Its main application areas include: factory distribution systems, residential community distribution systems, municipal commercial building and transportation tunnel distribution systems, packaged substations, complete switchgear cabinets, and outdoor distribution boxes.