CAWS600B型自动气象站电源故障分析

Troubleshooting of Power Faults in CAWS600B Automatic Weather Stations

CAWS600B型自动气象站在日常工作中经常出现电源板损坏故障,造成观测数据缺测。因厂家没有提供电源板的电路图,发生故障时维修比较困难。为了能较快掌握电源板故障维修方法,提高故障排除效率,通过对电源板的观察分析,参考相关资料,测绘出其详细的电路图,介绍CAWS600B型自动气象站电源的工作原理。分析表明:市电电压长期偏高、桥堆(BD1)额定电流偏小、变压器初级空气开关额定电流偏大和采集器内温度过高等是电源板损坏的主要原因,据此建议生产厂家进行一些有针对性的改进,也可供地面测报人员在实际维护中借鉴和参考。

Power supply board failures occur frequently in CAWS600B automatic weather stations, often resulting in data missing. Because manufacturers did not provide the power supply board circuit diagram, troubleshooting is difficult. In order to quickly repair the power supply board faults and improve troubleshooting efficiency, based on the observation and analysis of the power supply board and the realted data, a detailed circuit diagram is presented, and a brief introduction is made to the working principles of the CAWS600B automatic weather station power supply. The analysis concludes that the main causes for the damage of the power supply board are： long-term high electric voltage, small rated bridge electric current （BD1）, large rated current of the primary transformer air switch, and high temperature in the collector. Some specific suggestions for improvement are given for observers as reference in practical maintenance