Low-Voltage Reactive Power Compensation Cabinet
The Cooper CELB low-voltage harmonic filter utilizes filter capacitors connected in series with detuned/tuning reactors to form a tuned filter. The system can be switched via contactors or thyristor power semiconductors. It not only performs reactive power compensation to improve the power factor (PF) of the electrical system, but also effectively prevents resonance between the power grid and the capacitor banks, while absorbing and mitigating harmonic components within the system.

Impressive Technical Specifications of the Low-Voltage Reactive Power Compensation Cabinet
Key Features:
- Equipped with arc-pulling protection during switching operations to prevent the contactor from breaking under load, ensuring maximum safety for operation and maintenance personnel.
- The electrical cabinet features a highly scientific, neat, and optimized equipment layout; it integrates an automatic ventilation system that reduces internal operating temperatures, thereby enhancing reliability and extending the lifespan of electrical components and devices.
- The tuning reactor features a copper-wound, iron-core construction with low losses, excellent heat dissipation, and a significantly lower operational temperature rise compared to conventional designs.
- The low-voltage thyristor-switched tuning harmonic filter utilizes power semiconductor components for switching execution, enabling rapid switching with zero mechanical contacts. It eliminates electric arcing during operation, enhances equipment durability, and effectively responds to fast-fluctuating loads.
Practical Applications
- Low-Voltage Distribution Networks for Industrial and Commercial Applications
- Substations and Electrical Rooms for Construction Projects
- Manufacturing Plants, Workshops, and Industrial Zones
- Hospitals, Commercial Centers, and Hotels
- Office Buildings, Apartment Complexes, and High-Rises
| Rated Voltage |
220V – 750V |
|---|---|
| Rated Capacity |
120 kVAr – 444 kVAr (Customizable) |
| Reactance percentage |
6%, 7%, 14% |
| Tuning Frequency |
204 Hz, 189 Hz, 133 Hz (Customizable) |
| Ingress Protection |
IP20 |
| Application location |
Indoor |
| Insulation level |
3kV / 1min |
| Capacitor Discharge |
Voltage drops to below 50V within 1 min |
| Ambient temperature |
-20°C ~ +40°C |
| Standards |
IEC 60831, IEC 60289, VDE 0532, GB/T 15576-1995, JB/T 9663-1999 |
| Enclosure color |
RAL7035 (customizable) |
| No. | Document Name | Document Type | View Document |
|---|---|---|---|
| 1 | [EN] Eaton Low Voltage Capacitor | Catalog | Download |
