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Help Center635V 40kvar Power Factor Compensation Capacitor Rated Voltage 635VAC Capacity 40kvar 50Hz/60Hz
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Jinhua Dika Electrical Equipment Co., Ltd. is a specialized manufacturer with over 10 years of experience in the power quality field. Our 635V 40kvar Power Factor Compensation Capacitor is engineered to deliver reliable harmonic filtering and reactive power compensation for industrial and commercial electrical systems. With an annual export value exceeding US$1 million and a dedicated team of 11-50 professionals, we ensure every capacitor meets stringent performance standards. This capacitor is designed to improve power factor, reduce energy costs, and extend equipment lifespan – a core solution for modern electrical networks.
The capacitor features a robust metallized polypropylene film dielectric, which provides self-healing capabilities and high insulation resistance. Its rated voltage of 635VAC makes it suitable for 480V to 690V systems with safety margins, while the 40kvar capacity effectively compensates large inductive loads. Operating at 50/60Hz, it seamlessly integrates into global power grids. Each unit undergoes rigorous testing to ensure low dielectric loss (tan δ ≤ 0.2 W/kvar) and a long operational life of up to 100,000 hours under rated conditions.
Key Features & Technical Specifications
- High Overvoltage Capability: Designed to withstand 1.1 times rated voltage permanently and 1.3 times for 1 minute.
- Self-Healing Technology: In case of dielectric breakdown, the capacitor automatically clears the fault and continues operation.
- Overpressure Disconnection System: Built-in mechanical fuse disconnects the capacitor when internal pressure exceeds safe limits, preventing explosion.
- Low Losses: Dielectric loss tangent less than 0.2 W/kvar, contributing to energy efficiency.
- Environmental Safety: Dry design (no oil leakage risk) and RoHS compliant materials.
- Flexible Mounting: Multiple bushing options (M12 stud or cable) for easy installation in capacitor banks.
- Wide Temperature Range: Maximum case temperature +70°C, minimum -25°C, suitable for various climates.
| Parameter | Specification |
| Rated Voltage (Un) | 635VAC (50/60Hz) |
| Nominal Capacity | 40 kvar (at rated voltage) |
| Rated Frequency | 50 / 60 Hz |
| Dielectric Material | Metallized Polypropylene Film (MPP) |
| Case Material | Aluminum (cylindrical) |
| Discharge Resistor | Optional integrated (discharges to 75V in 3 min) |
| Insulation Level | 3/15 kV |
| Temperature Category | -25 / +70°C (other ranges available) |
| Life Expectancy | ≥ 100,000 hours (at rated conditions) |
| Standard Compliance | IEC 60831-1/2, GB/T 12747.1-2017 |
This capacitor brings tangible benefits: reduced electricity bills as power factor improves (from 0.7 to 0.95 or higher), lower line losses, increased transformer capacity by cancelling reactive current, and enhanced voltage stability for critical machinery. The self-healing design ensures minimal maintenance – typical failure rate below 0.1% per year in normal operation.
Frequently Asked Questions
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Q: What is the maximum switching surge current this capacitor can handle?
A: The capacitor is designed to withstand peak inrush currents up to 100 times its rated current when used with standard switching devices. For higher surges (e.g., in harmonic environments), optional detuned reactors are recommended. -
Q: Does this capacitor contain PCB or hazardous materials?
A: No. It uses a dry, non-toxic dielectric (polypropylene film) with aluminum case. It is fully RoHS and REACH compliant, and the overpressure disconnection system ensures safe end-of-life disposal. -
Q: What is the typical tolerance for capacitance?
A: Standard tolerance is +5% / -5% at 20°C. Custom tolerances (e.g., ±2%) are available upon request. -
Q: Can I use this capacitor in a system with harmonic content?
A: Yes, but the capacitor must be rated for the total rms voltage including harmonics. Our 635V version offers a higher voltage margin; however, for severe harmonic pollution, we advise using a detuned filter (e.g., 7% tuning reactor) to avoid resonance. -
Q: What is the recommended test voltage for routine checks?
A: Between terminals: 2.15 x Un AC for 10 seconds (factory test only). For field check, use a 500V or 1000V insulation tester between terminals and ground; minimum insulation resistance should be > 1000 MΩ. -
Q: How should I store the capacitor before installation?
A: Store in a clean, dry environment with temperature between -40°C and +85°C. Avoid direct sunlight and mechanical shock. If stored over 12 months, apply rated voltage for at least 1 hour before use to reform the dielectric. -
Q: Does the capacitor require a separate discharge resistor?
A: Most units come with an optional internal discharge resistor that reduces residual voltage to 75V or less within 3 minutes after disconnection (per IEC 60831). For automatic capacitor banks, external resistors may already be integrated; please confirm with our sales team. -
Q: What is the warranty period?
A: We offer a standard warranty of 12 months from date of shipment, with extended warranty options available for bulk orders.
Backed by Jinhua Dika Electrical Equipment Co., Ltd., a manufacturer with ISO9001, ISO14001, OHSAS18001, and other international certifications, this capacitor has been exported to over 30 countries including North America, Europe, Southeast Asia, and Africa. Our factory in Jinhua, Zhejiang, China, occupies 8000m² and produces more than 500,000 capacitors annually. Each unit passes automatic aging testing, capacitance and tan δ measurement, and high-voltage withstand tests. We support OEM/ODM with custom voltage, capacity, and terminal configurations to match your exact power factor correction needs.
Choose reliability. Choose Dika. Contact us today for a quote, technical datasheet, or free sample evaluation. Let us help you optimize your power quality with our proven 635V 40kvar capacitor solution.
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