Wholesale Water-Cooled Induction Heating Capacitor

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Water-Cooled Induction Heating Capacitor

The water-cooled induction heating capacitor is specially designed for high-power, long-running induction heating systems. By integrating advanced water-cooling heat dissipation technology, it achieves heating efficiency and operation stability, providing an ideal solution for metal smelting, heat treatment, forging, welding, and many industrial heating applications. 

Voltage: up to 3000 V Capacitance: up to 1000 µF
Power: up to 8000 kvar Frequency: up to 200 kHz

  • Specification

    Special power capacitors are designed for tuning induction furnaces and heating circuits. The individual production lines listed in the catalog cover a wide range of capacitances, powers, and frequencies in several different designs. Of course, there are also adjustments of electrical and mechanical parameters according to customer requirements - from simple changes to complete processing of the entire capacitor.

    The built-in precision-designed water-cooling circuit uses high thermal conductivity materials to ensure that the capacitor can quickly dissipate heat even under high load, effectively prevent overheating, extend service life, and improve the overall system efficiency and reliability. The use of high-quality dielectric materials combined with precision manufacturing processes ensures that the capacitor has electrical properties such as low loss, high withstand voltage, and low-temperature rise, providing stable and powerful reactive compensation for the induction heating system and improving the utilization rate of electric energy. The integrated intelligent temperature control sensor and protection circuit monitor the working temperature of the capacitor in real-time. Once it exceeds the safe range, the protection measures are immediately activated to effectively avoid failures caused by overheating and ensure the safe and stable operation of the equipment. It is suitable for induction heating equipment of all sizes, whether it is small laboratory equipment or large industrial production lines, it can provide precise power control and stable heating effects to meet the heating needs of different industries.

  • describe

    Voltage: up to 3000 V
    Capacitance: up to 1000 µF
    Power: up to 8000 kvar
    Frequency: up to 200 kHz

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Induction Heating & Melting Capacitors

Water-Cooled Induction Heating Capacitor

Engineered for continuous high-power induction heating systems with integrated water-cooling thermal management. Supports reactive power delivery under sustained thermal stress across industrial melting, forging, and heat treatment applications.

Product Overview

This capacitor series is purpose-built for induction heating systems that demand sustained reactive power delivery under thermal stress.

The water-cooled construction enables continuous operation at high power levels and frequencies. The internal cooling path uses a multi-pass serpentine channel machined into the base plate, extracting heat from the winding core and terminal connections. This thermal management approach supports duty cycles typical of industrial melting, forging, and heat treatment processes, where load variations and extended run times are standard.

The capacitor elements are wound using metallized polypropylene film with a self-healing dielectric layer. This construction limits fault current in the event of a dielectric breakdown, allowing the capacitor to continue operation after minor insulation failures. The housing is constructed from aluminum alloy with corrosion-resistant coating, and cooling water connections are fitted with standard threaded ports for compatibility with industrial circulation systems.

3000 V Rated Voltage 50/60 Hz base
1000 µF Capacitance Range Tolerance ±5%
8000 kvar Reactive Power At rated voltage
200 kHz Frequency Range Derating above 10 kHz
6–12 L/min Cooling Water Flow Depends on power level
+5 to +40°C Inlet Water Temp Condensation prevention

Core Advantages

01

Thermal Stability Under Load

Water-cooling maintains winding temperature within a controlled range, reducing capacitance drift and dissipation factor increase over time. This supports consistent reactive power output across production shifts.

02

Self-Healing Dielectric

Metallized polypropylene film isolates localized breakdown events, minimizing catastrophic failure risk and extending service intervals between maintenance cycles.

03

Wide Operating Bandwidth

Frequency response up to 200 kHz covers applications from low-frequency coreless furnaces to high-frequency surface hardening and welding systems.

04

Customizable Mounting

Terminal arrangements, bus bar interfaces, and mechanical envelope dimensions can be adapted to fit existing system layouts without major re-engineering.

Product Characteristics

Dielectric System

Dual-layer metallized polypropylene film with heavy edge metallization for enhanced current carrying capacity at high frequencies.

Cooling Circuit

Serpentine water channel machined into the base plate, maximizing surface contact with the winding assembly. Pressure-tested to 10 bar.

Terminal Design

Tin-plated copper bus bar terminals as standard. Threaded studs, flat tabs, or flexible braid connections available per requirement.

Monitoring Interface

Embedded PT100 temperature sensor for external PLC or protection relay integration. Optional thermal switch contacts for direct trip.

Discharge Resistor

Internal bleed resistors reduce stored charge to safe levels within 60 seconds of disconnection, per industrial safety practices.

Installation & Operation Notes

01

Cooling Water Quality

Use deionized or softened water with conductivity below 10 µS/cm. Maintain pH between 6.5 and 8.5. Filtration to 50 µm is recommended.

02

Flow Rate Verification

Verify flow meets minimum requirement before energizing. A flow switch is recommended to interlock the power supply with cooling flow.

03

Mounting Orientation

Install with cooling ports horizontal to allow air purging during initial fill. Vertical mounting requires careful venting procedures.

04

Electrical Connections

Torque bus bar connections to specified values to minimize contact resistance. Loose connections cause localized heating and premature aging.

05

Ambient Conditions

Indoor installation only. Ambient temperature range: -25°C to +50°C. Avoid direct sunlight, steam, and corrosive gas environments.

Frequently Asked Questions

What is the recommended water flow rate and inlet temperature for the cooling circuit? +
Flow rate depends on the specific power rating and ambient conditions. For standard applications, a flow rate of 4-6 L/min per 100 kvar is typical, with inlet temperatures between 15°C and 35°C. Detailed cooling requirements are provided with each unit based on the operating parameters.
How does the capacitor behave when the cooling water supply is interrupted? +
The integrated temperature monitoring system will detect the temperature increase and activate protection circuits. Depending on the configuration, this may include reduced output, alarm signaling, or disconnection from the power supply to prevent damage.
Can these capacitors be used in parallel for higher power systems? +
Parallel operation is supported, provided that the current sharing between units is managed. Each capacitor should be matched for capacitance and equivalent series resistance to ensure balanced loading. Connection bus bar design should account for the total current and minimize inductance.
What is the typical service life under continuous operation? +
Service life is influenced by operating temperature, voltage stress, and duty cycle. Under rated conditions with proper cooling, the design life exceeds 100,000 hours. Regular monitoring of capacitance and dissipation factor is recommended to track degradation.
What maintenance is required for the water cooling system? +
Regular maintenance includes checking water quality, cleaning or replacing filters, inspecting for leaks, and verifying flow rate. It is recommended to perform a full cooling system inspection every 6 months or per the manufacturer's schedule.
Jiande Antai Power Capacitor Co., Ltd.
Jiande Antai Power Capacitor Co., Ltd.
Jiande Antai Power Capacitor Co., Ltd. is China Wholesale Water-Cooled Induction Heating Capacitor Factory and Water-Cooled Induction Heating Capacitor Suppliers, located on the banks of the beautiful Xin'an River in Jiande City, Zhejiang Province. It was founded in 2003 and has a history of nearly 20 years. The company specializes in producing RFM series electric heating capacitors, series resonant capacitors for small and high frequencies, and DZMJ series DC filter capacitors, with a complete production and quality management system. 1S09001 management system certification and CE certification, the company has a strong technical force, advanced production technology, complete testing methods, and independent research and development capabilities. The company's products are novel in design, exquisite in manufacturing, stable in quality, and deeply trusted by domestic and foreign users. With more than 10 years of export experience, the products are exported to the United States, Italy, Germany, Ukraine, Turkey, South Korea, India and other countries. Series resonant capacitors, large-capacity high-voltage capacitors, and filter capacitors have an advantage in the domestic and foreign markets. We offer Water-Cooled Induction Heating Capacitor Suppliers for sale.
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