As a leader in power energy efficiency management, ZHIMING Group is dedicated to providing efficient, stable, and safe power quality solutions for global industrial and commercial clients. Our Low Voltage Power Capacitor product series represents the core component of reactive power compensation in modern electrical systems, embodying ZHIMING’s profound technical expertise in material science, electrical engineering, and structural design. We understand that superior reactive power compensation is key to enhancing energy efficiency and reducing operational costs. Therefore, every Low Voltage Power Capacitor manufactured by ZHIMING adheres to the highest quality standards, designed to help your power system achieve the optimal power factor, significantly reduce line losses, and effectively improve power supply voltage quality, injecting robust momentum into your sustainable development.
What is a Low Voltage Power Capacitor?
A Low Voltage Power Capacitor typically refers to a power capacitor with a rated voltage between 400V and 6kV. It operates by injecting capacitive reactive power into the system to offset the inductive reactive power generated by inductive loads (e.g., motors, transformers), thereby actively correcting the grid’s power factor.
The Core Value of Using ZHIMING Low Voltage Power Capacitors
1. Significant Reduction in Electricity Costs
By increasing the power factor to meet standard requirements (e.g., above 0.95), it effectively avoids penalties levied by power supply companies for low power factor, while reducing apparent power, leading to direct savings on electricity bills.
2. Reduced Equipment Load & Extended Service Life
Improved power factor reduces the total current in the circuit lines. This lightens the load on transformers, switching devices, and transmission lines, thereby lowering equipment operating temperatures and extending the service life of the entire system.
3. Minimized Line Energy Losses
The reduction in line current directly translates to a significant decrease in line losses (P = I²R), enhancing overall energy utilization efficiency and aligning with green, low-carbon operational goals.
4. Stabilized System Voltage & Improved Power Quality
Reactive power compensation helps maintain stable grid voltage levels, providing higher quality power for sensitive equipment and reducing production disruptions caused by voltage fluctuations.
Application Scenarios
ZHIMING Low Voltage Power Capacitors, known for their exceptional adaptability and reliability, serve numerous industries and scenarios with high demands for power quality:
1. Industrial Manufacturing
Widely used in workshop distribution systems across industries like automotive, metallurgy, and chemicals, compensating for reactive power generated by large motors, welding machines, variable frequency drives (VFDs), etc., ensuring stable and efficient production line operation.
2. Commercial & Residential Buildings
Installed in distribution rooms of office buildings, shopping malls, hospitals, and residential complexes to compensate for reactive power from central air conditioning, pumps, elevators, and lighting systems, enabling energy savings in smart buildings.
3. New Energy & Utilities
Applied at grid connection points of photovoltaic power stations and wind farms to meet grid reactive power requirements. Also commonly used for centralized or decentralized compensation on the distribution transformer side in urban and rural power grids.
4. Infrastructure & Special Environments
Suitable for locations with extremely high demands for power supply continuity, such as subways, rail transit, airports, and data centers, ensuring power supply reliability for critical loads.
Advantages & Technical Highlights of Low Voltage Power Capacitors
ZHIMING Group ensures our Low Voltage Power Capacitors remain competitive through continuous technological innovation and strict quality control:
1. Advanced Dielectric Material & Self-Healing Technology
Utilizes high-quality metalized polypropylene film as the dielectric, offering excellent self-healing performance. In case of a localized dielectric breakdown due to overvoltage, it rapidly restores insulation within microseconds, greatly enhancing product reliability and service life.
2. Low Loss & High-Efficiency Design:
The product’s dissipation factor (tan δ) is extremely low, typically below 0.1%. This means the power capacitor’s own energy loss is minimal, resulting in lower operating temperatures and more pronounced energy-saving effects.
3. Compact Structure & Lightweight Design:
Employing new materials and optimized structures, our power capacitors have a volume and weight only 1/4 to 1/5 of traditional products, saving installation space in distribution cabinets and facilitating transportation and installation.
4. Superior Safety Performance & Eco-Friendly Design:
- Utilizes dry technology, filled with inert gas or environmentally solid impregnants, eliminating the risk of oil leakage, ensuring safety and environmental friendliness.
- Built-in overpressure disconnector / explosion-proof device and discharge resistors ensure rapid discharge after power-off, safeguarding maintenance operations.
5. Wide Operating Range & Long Service Life:
Product design complies with international and national standards such as IEC 60831 and GB 12747. Capable of stable operation within a wide ambient temperature range of -25°C to +50°C, with a design lifespan exceeding 100,000 hours.
FAQ
Q1: What is the typical rated voltage and capacity range for Low Voltage Power Capacitors?
A1: ZHIMING Low Voltage Power Capacitors cover rated voltages including 400V, 450V, 480V, 525V, up to 690V, and other common low-voltage levels. Single-unit capacities typically range from 1 kvar to 80 kvar, allowing flexible configuration based on your specific compensation needs.
Q2: For installation, is centralized compensation or localized compensation better for low voltage power capacitors?
A2: This depends on your load distribution. Centralized compensation is installed in the main distribution room, offering lower equipment costs and simpler installation, but has a limited effect on reducing line losses. Localized compensation (decentralized compensation) is installed directly beside large inductive loads, providing the best compensation effect and maximizing line loss reduction, but requires a higher initial investment. The ZHIMING technical team can assess the optimal solution for you.
Q3: What is the “self-healing” function of a power capacitor, and why is it important?
A3: “Self-healing” refers to the capacitor’s ability to restore normal operation when a localized breakdown occurs in the internal dielectric due to a transient overvoltage. The metalized electrode around the breakdown point evaporates instantaneously, isolating the fault point. This feature significantly enhances the capacitor’s overload withstand capability and operational reliability, preventing total failure due to minor defects, making it a crucial safety feature in modern capacitors.
Q4: Are ZHIMING’s Low Voltage Power Capacitors “Dry Type”? What are the benefits?
A4: Yes, ZHIMING’s primary products utilize advanced Dry Type technology (GMKP). Compared to traditional oil-impregnated power capacitors, dry-type power capacitors are filled with special gases or solid dielectrics, eliminating the issue of oil leakage and pollution. They offer advantages such as flame retardancy, explosion-proof characteristics, and maintenance-free operation, making them safer and more environmentally friendly.
