1. Temperature: temperature is an important means to understand the load of power supply and power supply circuit. It is very important to monitor the temperature during the maintenance of low-voltage drawer cabinet. In addition, by regularly recording the temperature change of low-voltage drawer cabinet and drawing the temperature change curve, it is also conducive to a deeper understanding of the power consumption and fault in the power supply network of low-voltage drawer cabinet.

2·湿度：湿度是影响低压抽屉柜内部结构使用寿命的虫咬参数，过高的湿度不仅会带来内部高压电弧的风险，同样也会产生一定的金属腐蚀作用，因此也是检修的重点。

2. Humidity: humidity is an insect bite parameter affecting the service life of the internal structure of low-voltage drawer cabinet. Too high humidity will not only bring the risk of internal high-voltage arc, but also produce certain metal corrosion, so it is also the focus of maintenance.

3·气压：一般来说常规环境的气压变化不足以影响低压抽屉柜的正常运行，但是突变的气压或者高海拔地区的气压可能就有一定的影响了。

3. Air pressure: Generally speaking, the change of air pressure in conventional environment is not enough to affect the normal operation of low-voltage drawer cabinet, but sudden change of air pressure or air pressure in high altitude areas may have a certain impact.

4·颜色和气味：颜色和气温并不会直接影响低压抽屉柜，但是一般在故障后的低压抽屉柜会出现电灼烧的气味和烟尘，因此对于故障后的低压抽屉柜的诊断，颜色和气味还是非常重要的参考资料。

4. Color and smell: color and temperature will not directly affect the low-voltage drawer cabinet, but generally, the smell and smoke of electric burning will appear in the low-voltage drawer cabinet after fault. Therefore, color and smell are still very important reference materials for the diagnosis of low-voltage drawer cabinet after fault.

一般在经过严格规划和设计的电路系统中，低压抽屉柜只要按照正常的周期检修即可，但是对于内外部超大型变化后，一定要对低压抽屉柜进行全面检修，比如地震、上游电厂/电网的电压超大变化等，都会出现各种各样的安全隐患。

Generally, in the circuit system that has been strictly planned and designed, the low-voltage drawer cabinet can only be overhauled according to the normal cycle. However, after the internal and external super large changes, the low-voltage drawer cabinet must be overhauled comprehensively, such as earthquake, super large voltage changes of upstream power plant / power grid, etc., there will be a variety of potential safety hazards.