Induction Heating & Melting Capacitors

RFM 3300V 7350KVar 1500Hz Metallized Film Heating Capacitor

Designed for high-frequency, high-voltage, and high-power heating systems requiring metallized film technology. Supports precision heating equipment across industrial applications demanding performance and long-term stability.

Product Overview

The RFM series delivers rated voltage of 3300 V with reactive power capacity of 7350 kvar at 1500 Hz, supporting high-frequency induction heating applications requiring precision energy delivery.

The capacitor elements are constructed using advanced metallized film technology with self-healing properties. The metallized film provides temperature resistance and voltage withstand capability while significantly improving self-healing ability and service life. The unique structural design enables effective heat dissipation in high-frequency heating applications, preventing overheating and ensuring system safety during continuous operation.

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 flexible integration with various system grounding requirements and thermal management approaches.

Core Advantages

High Voltage Withstand Capability

Rated at 3300 V with capacity to withstand voltage shocks without damage. Provides solid voltage support for the system, ensuring stable operation under high-voltage working conditions and meeting stringent reliability requirements.

Ultra-Large Capacity Design

Delivers 7350 kvar reactive power compensation, ensuring rapid response and stable energy output under 1500 Hz high-frequency operation. Effectively improves heating efficiency and energy utilization in precision heating equipment.

Metallized Film Technology

Advanced metallized film as core material provides temperature resistance and voltage withstand properties. Significantly improves self-healing ability, extends service life, and reduces maintenance costs compared to conventional film designs.

Optimized Thermal Management

Unique structural design enables effective heat dissipation in high-frequency heating applications. Prevents overheating during continuous operation, ensuring system safety and long-term stability under demanding working conditions.

Product Characteristics

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Metallized Film Dielectric

Advanced metallized film technology with self-healing properties. Film construction provides temperature resistance and voltage withstand capability, enabling long-term stability under high-frequency and high-voltage operation.

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High-Frequency Performance

Optimized for 1500 Hz operation with low equivalent series resistance. Enables rapid energy delivery, precise temperature control, and improved heating efficiency in precision induction heating applications.

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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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Self-Healing & Discharge

Metallized film construction isolates localized breakdown events, allowing continued operation after minor insulation failures. Internal discharge resistors reduce stored charge to safe levels within 60 seconds.

Application Scenarios

Precision Heating Equipment

High-frequency, high-voltage heating systems requiring precision energy delivery and stable output. Supports applications where heating efficiency and energy utilization are critical.

Industrial Manufacturing

Induction heating and heat treatment in automotive, aerospace, and heavy machinery manufacturing. Provides reliable reactive power compensation for demanding production environments.

Metal Processing

Melting, surface hardening, and heat treatment of ferrous and non-ferrous metals. High voltage and capacity design meets stringent requirements of precision metal processing operations.

Energy Systems

Applications requiring high-frequency power conversion and energy storage. Metallized film technology ensures long-term stability and reduced maintenance costs.

Installation & Operation Notes

Thermal Management

Single cooled configurations require adequate airflow for heat dissipation. Double cooled configurations provide enhanced thermal management for higher power applications. Ensure proper clearance around cooling vents.

Mounting Orientation

Install with cooling ports oriented for optimal airflow. Single cooled configurations require horizontal mounting; double cooled configurations offer more installation flexibility.

Electrical Connections

Torque bus bar connections to specified values to minimize contact resistance. Loose connections cause localized heating and potential performance degradation. Use appropriate torque tools and follow manufacturer specifications.

Environmental Conditions

Indoor installation only. Ambient temperature range: -25°C to +50°C. Avoid corrosive gases, conductive dust, and excessive vibration. Proper insulation coordination required per local electrical codes.

Maintenance

Regular monitoring of capacitance and dissipation factor recommended to track degradation. Inspect cooling vents and terminal connections periodically to ensure continued reliable operation.

Frequently Asked Questions

What makes metallized film technology different from conventional film designs? +

Metallized film technology uses a thin metal layer deposited on the dielectric film, providing self-healing properties. When a localized breakdown occurs, the metal layer vaporizes around the fault point, isolating the defect and allowing continued operation. This extends service life and reduces maintenance costs compared to conventional film designs that may fail catastrophically.

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 provides enhanced thermal management with two independent cooling systems and no sub-sections, suitable for higher power applications requiring maximum heat dissipation.

How does the self-healing property affect capacitor performance? +

The self-healing property allows the capacitor to isolate localized dielectric breakdown events by vaporizing the metallized layer around the fault point. This prevents catastrophic failure and extends service life, though each healing event results in a slight capacitance reduction. Regular monitoring of capacitance value is recommended to track cumulative healing effects.

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. The metallized film construction provides extended life compared to conventional designs, with regular monitoring of capacitance and dissipation factor recommended to track degradation.

What cooling method is recommended for these capacitors? +

Forced-air cooling with filtered intake air is recommended for single cooled configurations. Double cooled configurations require dual independent airflow paths. Ambient temperature should not exceed 40°C for rated operation. Regular filter cleaning or replacement is necessary to maintain cooling efficiency.