VR1 DC voltage regulator instruction manual, which introduces the working principle, selection method, wiring method and appearance size of VR1 DC voltage regulator in detail.
This manual describes the VR1 series DC buck regulators used to step down shipboard power supplies to a stable load voltage. It explains the principle of operation, including the series diodes that drop voltage and the bypass circuit that raises voltage when the input falls.
The document also covers relay adjustment (W1, W2), selection of regulator type and voltage step, physical dimensions, load current ratings, and temperature‑controlled fan cooling that activates around 45 °C. This manual is written in Chinese.
| Voltage step (level 1) | 1.5 V |
|---|---|
| Voltage step (level 2) | 3 V |
| Voltage step (level 3) | 4.5 V |
| Maximum load current | 100 A–120 A, 200 A |
| Dimensions (VR1‑21) | 270 mm × 160 mm × 85 mm |
| Fan start temperature | ≈ 45 °C |
The VR1‑3 regulator provides a voltage step of 4.5 V.
The fan turns on automatically when the regulator temperature exceeds about 45 °C.
The VR1‑21 regulator measures 270 mm × 160 mm × 85 mm.