There are problems with the variable frequency power supply. The requirements for the environment of the variable frequency power supply are the same as those of other electrical equipment, such as medium voltage switchgear, transformer, etc.: the altitude is below 1000m, the relative humidity is less than 95% or 90%, there is no condensation, and the ambient temperature is less than 40e. When the altitude exceeds 1000m or the ambient temperature is higher than 40e, the variable frequency power supply must be derated for use. The ambient gas is non corrosive, non dust, non fire and explosive gas. The cooling mode of variable frequency power supply is water cooling and forced air cooling; The standard protection level of the inverter cabinet is IP20 or IP21, which can be increased to IP42 or IP54 when users have special requirements Based on the above simple environmental requirements of variable frequency power supply, both engineering design units and users will treat it as a general medium voltage switchgear or transformer for indoor layout and installation, and usually place the variable frequency power supply and other electrical equipment in the same room. If the conditions are good, the variable frequency power supply room will be designed separately as the transformer room. It is generally believed that the variable frequency power supply manufacturer has fully considered the ventilation and cooling factors of the variable frequency power supply. Therefore, in general, only simple measures such as increasing the indoor headroom or installing axial flow fans on the external wall are taken in the installation. From the electrical point of view, there is no doubt that the installation and layout of variable frequency power supply is similar to that of medium voltage switchgear or transformer. However, from the power loss of the three, there is no small difference between them. Remark loss of product variable frequency power supply oil immersed transformer dry-type transformer high voltage switch cabinet (%) 25223 Neglected variable frequency power supply loss refers to that within the entire speed regulation range, all three are rate products, and the loss only accounts for a small part of its total power. The loss of variable-frequency power supply at rated frequency and rated power is 2%, but there are few variable-frequency power supplies that often operate at rated points. Their loss is about 4% within the normal operation range of 70% 85% speed Take the 1000kVA variable frequency power supply commonly used in the water industry as an example, the corresponding loss during the regular speed regulation operation is 40kW, and all of these losses are converted into heat. The heat dissipation of oil immersed transformer is to transfer the heat to the radiator of the transformer shell through the circulation of insulating oil, and then the heat is taken away by the flowing air. Therefore, its heat dissipation mode is much better than the air cooled variable frequency power supply; Although the dry-type transformer can be forced ventilation and heat dissipation like the variable frequency power supply, the heating time constant of the transformer can be as long as several hours, while the heating time constant of the variable frequency power supply is only a few minutes due to the characteristics of the rectifier and inverter semiconductor devices, and their overtemperature resistance is incomparable. It can be seen that the installation and layout of variable frequency power supply cannot be treated as conventional medium voltage electrical equipment, and the temperature of indoor cooling air must be fully considered. The manufacturers of variable frequency power supply usually install centrifugal fans in the cabinet or axial flow fans on the top of the cabinet to conduct forced air cooling for the power device groups of the rectifier and inverter, and put forward the aforementioned environmental requirements, but they did not put forward suggestions on how to ensure these requirements. At this time, if there is no perfect air exchange system in the indoor and outdoor space, most of the heat emitted by the variable frequency power supply will stay indoors, making the ambient temperature of the variable frequency power supply rise continuously, and the environmental conditions required for air cooling will be completely changed. 交流定频柜外接电线，来源于故障 交流定频柜外接电线对室内环保的耍求与相关电气装置装置如中压触点开关柜、配电变压器等一致：地形1000m之下、对应室内湿度需小于95%或90%、无凝露，室内环保温湿度耍求不高过40e。当地形高达1000m或室内环保温湿度高过40e时，交流定频柜外接电线一定降容使用的。室内环保有毒的气体为无腐烛性、洁净埃、无加剧大火及暴炸性的有毒的气体。交流定频柜外接电线的冷确方式英文为风冷确和被迫大气冷确;交流定频柜外接电线箱体的基准个人防水等级分类为IP20或IP21，在用户组有特有耍求时可提生至IP42或IP54. 　 

基于变频电源的上述简单的环境要求，无论是工程设计单位或用户都会把它当成一般的中压开关柜或变压器来进行室内布置安装，通常将变频电源与其他电气设备同置一室。条件较好的会像设计变压器室一样单独设计变频电源室。大家普遍认为变频电源生产厂家已经充分考虑了变频电源的通风和冷却因素，因此，一般在安装上只采取提高室内净空高度或在外墙上安装轴流风机等简单措施。 世俱杯竞猜网站:航空地面电源，世俱杯竞猜网站:36V航空电源，世俱杯竞猜网站:400HZ变频电源，世俱杯竞猜网站:115/200V电源，世俱杯竞猜网站:27V直流电源，世俱杯竞猜网站:400HZ电源，世俱杯竞猜网站:航空电源　　 

从机电立场去看，对直流交流直流交流变頻器24v电原用到与中压电开关按钮柜或箱式干试电压器同样的施工流程策略无需非议。但要从三个的工作热效率不足去看，他们的区间内拥有大了的反差。新类产品直流交流直流交流变頻器24v电原油浸箱式干试电压器干试箱式干试电压器高压变电器电开关按钮柜微信备注名不足(%)25223忽略掉不计入直流交流直流交流变頻器24v电原不足指在另一个整个变速器超时光范围内，三个都是指率新类产品，不足仅占其总工作热效率的非常渺小一步分。直流交流直流交流变頻器24v电原在特殊容量工作频率和特殊容量工作热效率时的不足为2%，但近乎没了不时在特殊容量点工作的直流交流直流交流变頻器24v电原。他们的在70%85%发动机转速平时工作超时光范围内的不足约4%.以污水领域普遍的1000kVA直流交流直流交流变頻器24v电原为例子，其平时变速器工作时相对应的不足达40kW，一些不足另一个生成为含糖量。 油浸箱式干试电压器的能量散发是用绝缘电阻油的重复将含糖量传导到箱式干试电压器护壳的能量散发片上，再由出入气氛中秒杀含糖量，从而它的能量散发策略比气氛中水冷却型直流交流直流交流变頻器24v电原可好了;干试箱式干试电压器虽然与直流交流直流交流变頻器24v电原同样需要是勉强补风能量散发的，但箱式干试电压器的发冷时光常数超过数个钟头，而直流交流直流交流变頻器24v电原由整流和逆变半导体行业元器件封装的性能特点决心其发冷时光常数只不少钟，二者之间的耐超温效率是始终无法对比的。 　　 就此见到，调频供电适配器的按照场地布置办法并不能按一般的中电容式气机械来看待，而不得不能够充分来考虑其室外吊顶的放置制冷水大气的工作室温。调频供电适配器出产产商通畅在柜体按照轴免疫印迹式送轴流风机或柜顶按照轴免疫印迹送轴流风机，对整流器和逆变电原的电机功率集成电路封装组展开强行大气放置制冷水，并提到了上述的场景想要，但孩子 没得对是怎样的保持这类想要提到提案。因此若室外吊顶的外面积无加强的大气交互系统软件，则调频供电适配器释放弄出来弄出来的含糖量绝大多那部分逗留于室外吊顶的，使调频供电适配器的场景工作室温逐渐上升的，大气放置制冷水要求的场景先决条件就全部变了。