Low Voltage Capacitor and high-voltage capacitors are both used for reactive power compensation and power factor correction in electrical systems, yet they differ significantly in terms of construction, application, insulation, and installation environments. Understanding the differences between the two is essential for selecting the appropriate component for specific power distribution needs.

The most obvious distinction lies in their rated operating voltage. A Low Voltage Capacitor is typically designed to operate at voltages below 1,000 volts, while a high-voltage capacitor functions above that range, sometimes reaching tens or even hundreds of kilovolts. This difference in voltage rating directly impacts their internal insulation design. Low-voltage units often use plastic film or dry-type insulation materials that are sufficient for the moderate stresses they face. In contrast, high-voltage versions require oil-impregnated paper, gas-insulated systems, or other enhanced dielectric materials to safely withstand higher electrical stresses and prevent dielectric breakdown.

Another key difference is their physical size and design complexity. High-voltage capacitors are generally much larger and heavier than their low-voltage counterparts. This is not only due to their insulation requirements but also because of the larger clearances needed between internal components and the metal housing to prevent arcing. A Low Voltage Capacitor, being more compact, is easier to install and maintain, making it suitable for indoor panel installations in commercial and light industrial settings. On the other hand, high-voltage capacitors are usually installed outdoors or in dedicated substation enclosures.

From a protection and monitoring standpoint, high-voltage capacitors require more advanced systems. They are often equipped with built-in discharge resistors, pressure relief mechanisms, and monitoring sensors for temperature and pressure, ensuring early detection of faults. While some Low Voltage Capacitor units also feature safety enhancements, the requirements are generally less stringent due to the lower energy levels involved.

In terms of applications, the differences are also quite distinct. A Low Voltage Capacitor is typically used in motor control centers, building automation systems, and small to medium-scale industrial equipment. They are commonly applied at the load level to improve local power factor. High voltage capacitors, on the other hand, are used in transmission and distribution substations or large-scale industrial plants. Their role often includes system-wide voltage stabilization, network resonance control, and large-scale reactive power support.

The installation methods further highlight their differences. Low voltage capacitors are often mounted within electrical cabinets and connected via busbars or cables, with simple mounting requirements. High-voltage units, due to their size and insulation needs, often require heavy-duty support structures, safe clearance zones, and grounding systems to comply with electrical safety regulations.

Lastly, the cost and maintenance requirements vary. High-voltage capacitors are more expensive, both in terms of initial investment and ongoing upkeep, reflecting their greater complexity and energy handling capabilities. Low-voltage versions, while still needing occasional inspection, are generally more economical and easier to replace.

In conclusion, although both types serve the same basic electrical function, the Low Voltage Capacitor and high-voltage capacitor differ significantly in voltage rating, physical design, application, and complexity. Each is suited for different layers of the power distribution system and must be chosen according to the specific operational and environmental requirements of the installation.

Feature:

Large LCD Screen Display: Provides real-time visualization of power grid parameters, including power factor, voltage, current, active power, reactive power, and harmonics.

Versatile Switching Methods: Supports both equal capacity and fuzzy logic switching modes, with automatic recognition of the control mode. The controlled physical quantity is reactive power.

Comprehensive Protection Functions: Includes low load, over-voltage, under-voltage, phase loss, and harmonic protection to safeguard equipment and ensure operational reliability.