The Vaisala Surge Protector WSP150 is a compact transient overvoltage suppressor designed for outdoor use. It can be used with all Vaisala anemometers, weather stations and converters to protect these devices from surges entering via the power and signal cables. For example, a nearby lightning strike may induce high surge voltages that are not tolerated by the surge suppressors built into the instruments. Therefore, in areas with frequent thunderstorms, an additional surge protector is required, especially if long cables over 30 meters are used. We recommend installing and using a surge protector at all locations with a high risk of lightning strikes, such as the tops of tall buildings or pillars and in open areas. The WSP150 also has filters that block HF and RF noise induced in cables installed on radio transmission masts, power line transmission towers, etc.
The Vaisala WSP150 is a compact surge‑protecting device designed for outdoor use with wind and weather instruments. It protects power and signal cables from transient over‑voltages and filters HF/RF noise, offering three‑stage protection for each of its four channels.
The manual provides step‑by‑step installation using the adjustable mounting clamp, wiring diagrams for RS‑485, RS‑422, SDI‑12 and RS‑232, and technical data such as voltage limits, surge ratings, and environmental specifications. This manual is written in Japanese.
| Power channel surge voltage | ±60 V |
|---|---|
| Differential surge current | 10 kA |
| Power channel current rating | 1.5 A |
| Data channel current rating | 0.16 A |
| Environmental protection class | IP66 |
| Operating temperature range | -40 °C to +70 °C |
| Storage temperature range | -52 °C to +70 °C |
| Dimensions (W×H×D) | 130 × 94 × 58 mm |
| Weight | 0.65 kg |
| Maximum instrument cable length | 3 m |
The WSP150 has four channels: two power channels and two data channels.
Attach the unit with the adjustable mounting clamp to a pole mast of 30 mm–102 mm diameter, securing the steel strap and fastening the screws as shown in the installation figures.