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LLB(W) Series Passive Harmonic Filter System
The LLB(W) series low-voltage passive filtering device is designed based on power grid characteristics and harmonic load profiles. It consists of filter capacitors and filter reactors, utilizing specialized contactors or thyristor switches for switching operations, with a controller that manages filter branches based on power factor.
Product Overview
The LLB(W) series low-voltage passive filtering device is designed based on power grid characteristics and harmonic load profiles. It consists of filter capacitors and filter reactors, utilizing specialized contactors or thyristor switches for switching operations, with a controller that manages filter branches based on power factor. Professional simulation software is employed to optimize the filter design, ensuring the filtering and compensation performance meets user requirements; this improves power supply voltage quality, reduces losses, and enhances the power factor, thereby maintaining a healthy electrical environment and ensuring the safe operation of power distribution and electrical equipment.
Application Areas
The LLB(W) series low-voltage passive filtering device is suitable for industrial sectors utilizing power electronic equipment such as rectifiers, variable-frequency drives, and metallurgical or chemical electrolysis systems; transportation sectors including electrified railways, subways, and trolleybus systems; and sectors sensitive to harmonic interference—such as broadcasting, postal services, telecommunications, and the IT industry—as well as facilities with strict power quality requirements like exhibition centers, commercial buildings, and hospitals.
Technical Specifications
| Rated voltage | 400V, 660V, 750V, 1000V |
| Rated frequency | 50Hz |
| Rated compensation capacity | Up to 500 kvar per cabinet |
| Harmonic filtering rate | Can exceed 60%, fully meeting national standard requirements |
| Over‑voltage capability | Allows long‑term operation at 1.1 times the rated voltage (power frequency) |
| Over‑current capability | Allows long‑term operation at up to 1.3 times the rated current |
| Capacitor connection method | Filter branches connected in "Y" or "Δ" configuration |
| Measurement error: Voltage: | Voltage: ±0.5%; Current: ±1.0%; Reactive power: ±1.0% |
| Switching method: | Automatic switching based on power factor |
| Switching time delay | Adjustable from 0 to 999 seconds |
Operating Environment
① Ambient temperature: -5°C to +40°C; Humidity: 0–50%
② Altitude: ≤2000m
③ Environmental requirements: Free from oily dust and corrosive, flammable, or explosive gases
Note: Customization is available for other special applications or environmental conditions.
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