Active Power Filter

New Products / New Technology

It employs a high‑efficiency three‑level topology and advanced all‑digital control technology to eliminate harmonic currents and improve power‑grid quality. Equipped with selective harmonic compensation, it can compensate harmonics from the 2nd to the 50th order. It continuously monitors harmonic currents in real time, automatically tracks load‑induced harmonic variations, and offers exceptional controllability and rapid response. The full response time is ≤5 ms, and the instantaneous response time is ≤100 µs. It can be directly integrated with Wanxin smart capacitors for centralized control. A high‑definition 7‑inch Chinese‑language color touchscreen provides real‑time display of system and equipment operating parameters. Comprehensive protection features include overcurrent, overvoltage, undervoltage, and overtemperature safeguards.

Smart capacitor

New Products / New Technology

Maximum 60 kVAr capacitors, available in freely configurable configurations; sectionalization capability of Icu > 25 kA; self‑adaptive, self‑organizing control with no manual intervention; two control strategies—voltage/reactive power and power factor—along with protection functions for overvoltage, undervoltage, low current, overheating, and harmonic limit violations; standard RS‑485 communication interface with a full suite of communication protocols to meet provincial grid requirements; intelligent AI capabilities that display optimized compensation schemes and information on over‑ and under‑compensation.

Microcomputer-based protection and control device

New Products / New Technology

The WX900 is an integrated microprocessor-based protection and control device that combines six functions in one: microprotection, metering, switch‑state indication, temperature and humidity control, infrared detection, and intelligent voice interaction. The WX900 (models L, Y, D, R, T2, and T3) further integrates line protection, transformer protection, motor protection, capacitor protection, incoming feeder automatic transfer protection, bus‑tie automatic transfer protection, and voltage transformer protection into a single seven‑in‑one unit. It is among the first domestically developed microprocessor‑based protection and control devices to feature the Dianhong PHMV 1.0 system and to possess independent intellectual property rights. The device is built on a cutting‑edge, highly integrated microcontroller development platform, with no external buses beyond the chip itself, delivering excellent anti‑interference performance.