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Power Capacitors
- BY71 Series Cylindrical Capacitor
- BSMJ Series Self-healing Low Voltage Shunt Capacitors
- BY86 Series Controlled Intelligent Capacitor
- BYKXG/F Series Anti-harmonic Intelligent Capacitor
- BY81 Series Intelligent Capacitor
- BY82J Series Anti-harmonic Intelligent Capacitor
- BY89 Series Intelligent Capacitor
- Intelligent Controller Series
- Reactor
- Intelligent Switch Series
- Alternating Current Contactor
- Multifunctional power instruments
- Circuit Breaker
- APF/SVG/SPC Cabinet & Module Series
BY CJ19-43 Series Switching Capacitor Contactor Three Pole AC Contactor Electrical Contactor 220V Low-voltage AC Contactor
Main Specifications Data of CJ19 - 43 AC contactor
| Product modle name | CJ19-43 | |
| Electrical life(10000 cycles） | 10 | |
| Rated Voltage | 220V | |
| Rated current le (380V)A | 63 | |
| Controllable capacitor capacity(kvar | 22 | |
| Rated insulation voltage (V) | 500 | |
| Surge suppression capability | 20le | |
| Action conditions | Actuation:(85%~110%Us;Release:(20%-75%)Us | |
| Coil power (VA) start/hold | 200/20 | |
| Auxiliary contact control capacity | AC-15 360VA;DC-3 33W | |
| Weight (kg) | 1.5 | |
Overview of CJ19 - 43 Alternating Current Contactor
The Main Functions of CJ19 - 43 Alternating Current Contactor
1. Advanced harmonic mitigation and power quality enhancement
BY CJ19-43 is designed to suppress harmonic distortion in low-voltage AC systems and ensure stable power quality by reducing interference to the grid from non-linear loads such as variable frequency drives (VFDs) and industrial automation systems.
2. Three-phase dynamic reactive power compensation
Optimize three-phase unbalanced loads and improve energy efficiency by dynamically switching capacitor banks, improving power factor correction and minimizing grid losses.
3. Zero-crossing switching technology
The three-pole AC contactor is equipped with intelligent zero-voltage switching to eliminate inrush current during capacitor activation, extending component life and reducing maintenance costs.
4. High performance AC contactor for harsh environments
Rugged construction and 220V low voltage compatibility ensure reliable operation in industrial environments and resist arcing and thermal stress for long-term durability.
5. Seamless integration with smart grid systems
Supporting MODBUS-RTU or RS485 communication protocols, it can realize real-time monitoring and be integrated into the energy management platform to achieve automatic power quality optimization.
6. Enhanced safety with overload and surge protection
Built-in overcurrent protection and voltage surge suppression protect the capacitor and connected equipment from faults caused by grid instability or harmonic resonance.
7. Energy-saving design for sustainable operation
Reduce active power losses by up to 30% through precision switching, meeting global standards for energy conservation and reducing carbon footprint.
8. Compact modular structure, easy to maintain
Modular design simplifies capacitor bank installation and expandability, ideal for retrofitting existing power quality correction systems without extensive downtime
Working Conditions of CJ19 - 43 Alternating Current Contactor
Surrounding air temperature
- Applicable temperature range: -5℃ to +40℃
- The 24-hour average temperature must be kept at or below +35°C.
Altitude:
- The installation altitude shall not exceed 2000 meters.
Weather conditions
- When the temperature reaches a maximum of +40°C, the relative humidity must not surpass 50%. At lower temperatures, higher humidity levels are acceptable, allowing up to 90% relative humidity at 20°C. It is essential to implement special measures to address potential condensation resulting from temperature fluctuations.
Installation conditions:
- The mounting surface must not be tilted more than +5° or -5° from the vertical.
Shock and Tremor
- The product should be installed in an environment without significant shaking, shock and vibration to ensure optimal performance and extend service life.
Working Principle of CJ19 - 43 Alternating Current Contactor
BY CJ19-43 series three-pole AC contactors are designed for efficient switching of capacitor banks in low voltage (220V) power systems, ensuring optimized power quality, reduced harmonics, and enhanced reactive power compensation. Its design integrates advanced technology to address challenges such as inrush current suppression, three-phase unbalance, and capacitor switching transients, making it a key component in smart grid energy management and industrial circuit protection systems.
Key operating mechanisms
Two-stage switch with pre-charge resistor
The contactor uses a dual contact system (pre-charge contacts and main contacts) to suppress capacitor inrush current. When powered on, the pre-charge contacts close first, allowing current to flow through the integrated current limiting resistor (6-7% impedance), gradually charging the capacitor. After a few milliseconds, the main contacts close, bypassing the resistor and ensuring full load operation. This staged process reduces capacitor stress by up to 70%, extending capacitor life and preventing damage caused by harmonic amplification.
Three-phase dynamic balance
Optimized for three-phase AC systems, the contactor dynamically compensates for unbalanced loads by switching capacitor banks across the phases. This reduces negative sequence currents and stabilizes voltage levels, reducing the risk of motor overheating and insulation degradation caused by phase imbalance.
Anti-harmonic design
The contactor integrates anti-resonance technology to avoid parallel resonance between capacitors and grid impedance, a common problem in systems with non-linear loads (e.g., inverters, rectifiers). By suppressing harmonic distortion (e.g., 5th, 7th harmonics), it prevents capacitor overcurrent and voltage waveform distortion, in compliance with the harmonic suppression standard.
Zero-crossing activation
The contactor uses intelligent zero voltage switching technology to minimize switching transients and arcing during capacitor switch-on. This feature protects sensitive equipment from voltage surges and reduces electromagnetic interference (EMI), which is critical in industrial automation environments.
Modular installation and smart grid compatibility
The contactor features a 35mm DIN rail mounting design, allowing for flexible integration into low voltage capacitor banks or retrofit projects. Its MODBUS-RTU/RS485 communication capability enables real-time monitoring via an energy management platform, facilitating automation of power factor correction and load balancing in smart grid systems.
Installation Size Drawin of CJ19 - 43 Alternating Current Contactor
| Type | Amax | Bmax | Cmax | Dmax | E | F | Tip |
| CJ19-43 | 90 | 58 | 136 | 86 | 40 | 48 |
Aside from being installed using screws,the contactor can also be fitted onto a 35mm rail. |
Wiring method of CJ19 - 43 Alternating Current Contactor
It is the details that demonstrate the quality
Advanced silver alloy contacts for unparalleled electrical performance
BY CJ19-43 series switch capacitor contactors feature high-quality silver alloy contacts designed to provide superior reliability in high-frequency switching applications, making them ideal for harmonic suppression and three-phase power systems. Silver alloy is the cornerstone material for high-quality electrical components, combining excellent conductivity with outstanding arc resistance to ensure minimal contact resistance and reduced energy losses during operation. This is critical for harmonic control (harmonic suppression) and improving overall power quality, as frequent switching under transient loads requires corrosion-resistant and welding-resistant materials.Our silver alloy contacts are made with a precise ratio of silver and complementary metals, such as copper or nickel, to enhance mechanical strength and thermal stability. This formulation minimizes wear even under extreme conditions, extending contact life by up to 30% compared to traditional copper-based contacts. For three-phase contactors (three-phase contactors), this means stable performance in balancing loads and reducing voltage fluctuations, which are key requirements in industries such as manufacturing and renewable energy.The low contact resistance of silver alloys also helps improve energy efficiency, reduce heat, and reduce the risk of premature component failure. This is especially important in harmonic control systems, as inefficient contactors can exacerbate waveform distortion. The BY CJ19-43 series uses silver alloy technology to ensure stable operation in both low-voltage AC contactors (low-voltage AC contactors) and demanding industrial environments, making it a trusted choice for global customers seeking reliable power quality solutions.
Innovative slider design to enhance mechanical durability and flexibility
BY CJ19-43 series uses a patented slider design, redefining the mechanical performance of low voltage contactors (LV contactors). Unlike traditional designs that are prone to wear and misalignment, our slider mechanism ensures smooth and precise movement of contacts during engagement and separation, minimizing mechanical stress and extending service life. This innovation is critical for applications that require frequent switching, such as capacitor banks and harmonic filters in reactive power compensation schemes (VAR compensation systems).The slider design uses a dual-track guide system to align the contact assembly with micron-level precision, reducing friction and eliminating lateral movement. This results in a mechanical life of more than 10 million operations, a 50% improvement over standard contactors. For three-phase systems, this durability ensures consistent performance in balancing loads and stabilizing voltages, even in environments with high electromagnetic interference.In addition, the slider design allows for easy adjustment of contact pressure to optimize performance for different load types, such as resistive, inductive, or capacitive. This flexibility is critical for harmonic control, as different load characteristics require adaptive solutions. By integrating this design, the BY CJ19-43 series provides a versatile platform that can be used to improve power quality in a variety of industries, from data centers to industrial automation.
High purity copper coil, improve energy efficiency and thermal stability
BY CJ19-43 Series uses high purity copper coils to achieve industry leading energy efficiency and thermal performance in AC contactors (AC contactors). Copper's superior conductivity reduces coil power consumption by up to 20% compared to aluminum alternatives, reducing operating costs and supporting sustainable energy practices. This efficiency is particularly important in harmonic control systems, as reducing energy waste is consistent with global initiatives to improve power quality and reduce carbon footprint.Our copper coils are precision wound to minimize resistance and optimize magnetic flux distribution. This reduces heat generation during operation, ensuring stable performance even under long-term high-load conditions. In temperature rise tests, the BY CJ19-43 series has a maximum temperature rise of 65K, fully meeting industry reliability and safety standards. For three-phase contactors (three-phase contactors), this thermal stability means stable switching performance in harsh environments such as substations and manufacturing plants.The copper coil also enhances the contactor's responsiveness, enabling fast start-up times, which are critical for dynamic harmonic mitigation and capacitor switching. This speed ensures that transient current and voltage spikes are minimized, protecting downstream equipment and improving overall system stability. The BY CJ19-43 series combines high-purity copper with advanced insulation materials to set a new benchmark for efficient and reliable power quality solutions.
Storage Workshop
Production workshop
Workshop Vedio
Baoyu Holding Co., Ltd
Baoyu Holding Co., Ltd. was founded in 2015 and is located in Wenzhou City, Zhejiang Province. The location is excellent and the transportation is convenient. We have very rich industry experience and is a trusted supplier. The company has advanced production equipment and skilled front-line employees. Our company is mainly engaged in the production and sales of power quality products，such as active power filters, static var generators, intelligent capacitors, power capacitors, reactive power compensators, composite switches, capacitor contactors, thyristor switches, reactors. Our company knows that the development of the company depends on the innovation and quality of the products. Therefore, our products have strict quality control from the procurement of raw materials to the sale of finished products. The company has established a quality management system that meets the requirements of the international quality management system. The company continuously releases the original innovations according to the market and customer needs, and always maintains the novelty and innovation of the products. The company wants the customer's thoughts and urgency. Solving problems for customers and meeting customer needs is our eternal pursuit! Our company's products are sold worldwide. The company has won the unanimous recognition of consumers with satisfactory product quality and perfect after-sales service. We have a professional R & D team. We can accept O E M and O D M.We sincerely welcome friends from all over the world to visit our company and cooperate with us on the basis of long-term mutual benefits. We are looking forward to receiving your enquiry soon.
VOur storage facility utilizes precision climate control, automated 3D warehousing (which increases capacity by 200%), and integrated safety systems (including fire suppression, anti-static protocols, and monthly audits) to maintain zero oxidation and ensure product integrity. In addition, our cleanroom manufacturing facility features a combination of natural and LED lighting, optimized workflows, and cross-trained technicians to enhance efficiency. Automated quality control systems and ISO-certified processes ensure compliance with dimensional and electrical standards, while AI-driven analytics and stringent protocols help achieve near-zero defects. By integrating advanced automation, tailored solutions, and steadfast reliability, Baoyu provides durable, mission-critical power systems, reinforcing our status as the preferred global partner for industries that require precision and innovation.
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