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Help CenterDry Type High Voltage Capacitor 635V 40kvar With Overpressure Disconnector for Power Factor Correction
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Jinhua Dika Electrical Equipment Co., Ltd. is a dedicated manufacturer of power quality solutions, specializing in dry-type high-voltage capacitors designed for demanding industrial environments. Our 635V 40kvar Dry Type High Voltage Capacitor with Overpressure Disconnector represents a reliable and maintenance-free solution for power factor correction and reactive power compensation. Crafted with advanced self-healing polypropylene film and integrated safety features, this capacitor delivers consistent performance, long service life, and enhanced operator safety—making it an ideal choice for factories, substations, and renewable energy systems seeking to improve energy efficiency and reduce electricity costs.
Built to withstand harsh electrical conditions, this capacitor operates with minimal losses and excellent thermal stability. The integrated overpressure disconnector provides a critical safety mechanism: in the event of internal overpressure (due to end-of-life or abnormal conditions), the disconnector permanently opens the circuit, preventing catastrophic failure or explosion. This feature, combined with the dry-type construction (no oil or electrolyte leak risk), makes it suitable for indoor installations where environmental compliance and safety are paramount.
Key Product Features & Technical Specifications
- Dry-Type Construction – No liquid electrolyte, eliminating leakage risks and enabling easy disposal at end of life. Ideal for environmentally sensitive applications.
- Self-Healing Metallized Polypropylene Film – Allows the capacitor to withstand momentary voltage spikes by clearing faults locally, extending operational life and reducing downtime.
- Integrated Overpressure Disconnector – Meets international safety standards; automatically isolates the capacitor from the system when internal pressure exceeds safe limits, protecting personnel and equipment.
- High Voltage Rating (635V) & 40kvar Capacity – Designed for 3-phase systems with nominal voltage up to 635V, delivering 40kvar of reactive power for effective power factor correction.
- Built-In Discharge Resistor – Ensures safe residual voltage reduction to below 50V within 1 minute after disconnection, complying with safety regulations.
- Low Losses & High Efficiency – Dielectric losses less than 0.5 W/kvar, contributing to overall system energy savings.
- Wide Operating Temperature Range – Suitable for ambient temperatures from -25°C to +55°C, with maximum case temperature of 70°C.
- Robust Aluminum Case & Overpressure Safety Base – Equipped with a pressure-sensitive rupture base designed to release gas in a controlled manner, preventing explosion.
| Parameter | Value |
| Rated Voltage (Un) | 635 V AC (3-phase, 50/60 Hz) |
| Rated Capacity (Qn) | 40 kvar |
| Capacitance (per phase) | Approximately 315 µF (calculated from Q = √3 × V² × 2πfC) |
| Dielectric Material | Self-healing metallized polypropylene film |
| Discharge Resistor | Built-in, |
| Overpressure Disconnector | Integrated (mechanical rupture base), UL/CSA recognized |
| Losses | |
| Operating Temperature | -25°C to +55°C (max. case 70°C) |
| Enclosure | Extruded aluminum case with insulating terminals |
| Mounting | Vertical or horizontal, with M12 studs |
Customer Benefits & Application Advantages
- Improved Power Factor – Reduces reactive power demand from the grid, lowering utility penalties and improving transformer capacity utilization.
- Energy Savings – Minimizes line losses; typical payback period of 6-12 months in continuous operation.
- Enhanced System Stability – Smooth voltage regulation and reduced harmonic stress on switchgear and cables.
- Safety Assurance – Overpressure disconnector prevents catastrophic failure; dry design eliminates oil leaks and fire risks.
- Long Lifespan – Self-healing technology ensures >100,000 operating hours under rated conditions; field-proven reliability for 15+ years.
- Easy Installation & Maintenance-Free – Compact footprint, plug-and-play terminals, no periodic oil checks or dielectric fluid handling.
Trusted by global industries, our capacitors are exported to markets worldwide including North America, Europe, Southeast Asia, Africa, and Oceania. As a certified manufacturer (ISO9001, ISO14000, OHSAS18001, HACCP, and others), Jinhua Dika Electrical Equipment Co., Ltd. maintains strict quality control from raw material procurement to final testing. With an annual export value of US$1–1.5 million and a dedicated team of 11–50 skilled professionals, we ensure prompt delivery from ports like Shanghai, Ningbo, and Guangzhou. Each capacitor undergoes 100% hi-pot test, capacitance measurement, and overpressure mechanism verification before shipment.
We invite OEM/ODM inquiries and are happy to provide custom capacitor solutions for unique voltage or reactive power requirements. Contact our team today for a tailored quotation, technical datasheet, or sample request. Experience the Dika difference: reliable, safe, and efficient power factor correction.
Frequently Asked Questions (FAQ)
- What is the main advantage of a dry-type capacitor over an oil-filled one? Dry-type capacitors contain no liquid electrolyte, eliminating leakage risks, fire hazards, and disposal complications. They are more environmentally friendly and safe for indoor use.
- How does the overpressure disconnector work? When internal gas pressure builds up due to capacitor degradation, the disconnector’s rupture disk activates, physically opening the internal electrical connection and permanently isolating the capacitor from the circuit. This prevents explosion and damage to nearby equipment.
- Can this capacitor be used in harmonic-rich environments? Yes, it is suitable for standard power factor correction. For high harmonic distortion (e.g., >10% THD), we recommend adding series detuning reactors. Consult our engineering team for filter design assistance.
- What is the expected lifespan of this capacitor? Under rated voltage, temperature, and harmonic conditions, the self-healing design typically provides 100,000 operating hours or more (approximately 11-15 years of continuous operation).
- Is it compatible with automatic capacitor banks (APFC relays)? Absolutely. The 635V rating and standard terminals allow easy connection to most automatic power factor correction controllers and contactor switching systems.
- What are the shipping options from your factory? We ship via sea or air from Shanghai, Ningbo, Tianjin, or Guangzhou ports. Standard packaging includes sturdy cartons with foam inserts; bulk orders may use wooden crates.
- Do you provide custom voltage or kvar ratings? Yes, as a manufacturer, we offer customization for voltages from 400V to 800V and capacities up to 100kvar per unit. Minimum order quantity for custom models applies.
- What certifications does this product hold? Our capacitors are manufactured under ISO9001:2000, ISO14000, OHSAS18001, HACCP, TL900, QS9000, and others. Specific product certifications (e.g., UL, CE) are available upon request depending on market needs.
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