Induction Heating & Melting Capacitors

RFM 3000V 7804KVar 1200Hz Water-Cooled Induction Heating Capacitor

Designed for high-power induction heating systems requiring water-cooled thermal management. Supports metal smelting, heat treatment, and high-frequency induction heating applications across aerospace, automotive, steel, and new energy material processing industries.

Product Overview

The RFM series delivers rated voltage of 3000 V with reactive power capacity of 7804 kvar at 1200 Hz, supporting large-scale industrial induction heating operations.

The capacitor elements are constructed 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 integrates a precision-engineered water-cooling circuit using materials with thermal conductivity, extracting heat from the winding core and terminal connections during operation. This thermal management approach maintains internal temperature within safe ranges, supporting duty cycles typical of demanding industrial environments.

Two configuration options are available: single cooled-isolated case design with sub-sections (all terminals isolated) and double cooled-isolated case design without sub-sections (all terminals isolated). Both configurations provide complete terminal isolation for integration with various system grounding requirements.

Core Advantages

High Voltage Withstand Capability

Rated at 3000 V with margin for transient overvoltages common in industrial induction heating environments. Supports stable operation under complex working conditions, meeting stringent requirements of large-scale metal smelting and heat treatment applications.

Ultra-Large Capacity Design

Delivers 7804 kvar reactive power compensation, significantly enhancing system load capacity. Accelerates heating processes, enables more uniform heating distribution, and effectively shortens production cycles.

High-Frequency Optimization

Specifically designed for 1200 Hz operation, the capacitor enables precise energy transmission control. Supports fine control of material heating, ensuring consistency in heating results across production batches.

Water-Cooled Thermal Management

Integrated water-cooling system effectively removes heat generated during operation through circulating cooling water. Maintains internal temperature within safe range, extending product service life and reducing maintenance costs.

Product Characteristics

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Dielectric System

Metallized polypropylene film with self-healing properties. Advanced insulation materials combined with precision manufacturing processes ensure low loss characteristics and high voltage withstand capability. Dielectric thickness selected for 3000 V rating.

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Water Cooling Circuit

Precision-designed water-cooling system uses materials with thermal conductivity to ensure rapid heat dissipation under high load. Circulating cooling water effectively prevents overheating, extends service life, and improves overall system efficiency and reliability.

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Case Configurations

Single cooled-isolated case design with sub-sections for fault isolation. Double cooled-isolated case design without sub-sections for enhanced thermal management. All terminals isolated for flexible system integration.

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Terminal Design

Heavy-duty bus bar terminals with low contact resistance. Terminal materials selected for thermal conductivity and corrosion resistance. Multiple configurations available for various connection methods.

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Protection & Discharge

Internal discharge resistors reduce stored charge to safe levels within 60 seconds of disconnection. Integrated protection features ensure safe operation under demanding industrial conditions.

Application Scenarios

Aerospace Manufacturing

Surface hardening and heat treatment of aerospace components requiring precise temperature control. Supports high-precision energy transmission for demanding material processing requirements.

Automotive Production

Induction heating and heat treatment of automotive components. Provides stable and powerful reactive compensation for induction heating systems, improving electric energy utilization efficiency.

Steel Smelting

Large-scale metal smelting and heat treatment operations. High voltage and capacity design meets stringent requirements of heavy industrial heating processes.

New Energy Materials

Processing of new energy materials requiring uniform heating and precise temperature control. Water-cooled design supports continuous operation in demanding production environments.

Installation & Operation Notes

Cooling Water Quality

Use deionized or softened water with conductivity below 10 µS/cm to prevent galvanic corrosion within the cooling channels. Maintain pH between 6.5 and 8.5. Filtration to 50 µm is recommended to avoid blocking narrow passages.

Water Flow Requirements

Flow rate depends on specific power rating and ambient conditions. For standard applications, flow rate of 4-6 L/min per 100 kvar is typical, with inlet temperatures between 15°C and 35°C. Detailed cooling requirements provided with each unit.

Mounting Orientation

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

Electrical Connections

Torque bus bar connections to specified values to minimize contact resistance. Loose connections cause localized heating and potential performance degradation.

Environmental & Grounding

Indoor installation only. Ambient temperature range: -25°C to +50°C. All terminals isolated, requiring proper insulation coordination with adjacent equipment per local electrical codes.

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.

What is the difference between single cooled and double cooled configurations? +

Single cooled configuration uses one cooling system and includes sub-sections for internal fault isolation. Double cooled configuration uses enhanced cooling with two cooling systems and no sub-sections, providing improved thermal management for higher power applications where maximum heat dissipation is required.

How does the capacitor behave when cooling water supply is interrupted? +

Without circulating cooling water, the capacitor will experience rapid temperature increase. A flow switch is recommended to interlock the power supply with cooling flow. The integrated thermal protection will activate when temperature exceeds safe thresholds.

What is the expected 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 80,000 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. A full cooling system inspection is recommended every 6 months or per the manufacturer's schedule.