User manual for Longli DBWZ/SBWZ series numerical control non‑contact voltage regulator, covering installation, operation, maintenance and troubleshooting.
The DBWZ (single‑phase) and SBWZ (three‑phase) series are fast‑response, DSP‑controlled voltage regulators that provide stable, high‑efficiency power for industrial equipment. They feature full non‑contact control, intelligent display, and comprehensive protection functions.
The manual details product introduction, technical specifications, environmental requirements, component identification, wiring diagrams, operating instructions, safety precautions, routine maintenance, and fault handling procedures to ensure safe and reliable use. This manual is written in Chinese.
| Rated Capacity | 2 kVA–50 kVA (single‑phase), 6 kVA–600 kVA (three‑phase) |
|---|---|
| Input Voltage Range | 220 V ± 15 % (± 20 %) or 380 V ± 15 % (± 20 %) |
| Output Voltage | 220 V, 380 V, 110 V/100 V, 220 V/200 V |
| Reaction Speed | < 40 ms |
| Insulation Resistance | > 5 MΩ (ground) |
| Instantaneous Overload Capability | 2 × rated current |
| Display Type | LED digital display |
| Cooling Method | Temperature‑controlled forced air cooling |
The regulator reacts in less than 40 milliseconds.
It provides overload, over‑voltage, under‑voltage, phase‑loss, short‑circuit and over‑heat protection.
Connect the input power line to the input terminal marked “输入”, the load line to the output terminal marked “输出”, and ensure the grounding wire is attached to the ground terminal.
It is recommended to perform maintenance every three months.