1， 电气设备应有足够的电气间隙及爬电距离以保证设备安全可靠的工作。
1, electrical equipment should have enough electrical clearance and creepage distance to ensure the safe and reliable operation of the equipment.
电气间隙是指在两个导电零部件之间或导电零部件与设备防护界面之间测 得的最短空间距离。 即在保证电气性能稳定和安全的情况下, 通过空气能实现绝 缘的最短距离。
The electrical gap refers to the shortest distance between two conductive parts or between the conductive parts and the protective interface of the device. That is to say, under the condition of ensuring the stability and safety of electrical performance, the shortest distance of insulation can be achieved through air.
爬电距离是指沿绝缘表面测得的两个导电零部件之间或导电零部件与设备 防护界面之间的最短路径。 即在不同的使用情况下, 由于导体周围的绝缘材料被 电极化, 导致绝缘材料呈现带电现象。 此带电区 (导体为圆形时, 带电区为环形) 的半径,即为爬电距离。
YFFB扁电缆Creepage distance refers to the shortest path between the two conductive parts along the insulation surface or between the conductive parts and the device protection interface. That is to say, under different usage conditions, the insulation material is electrified due to the electrode material around the conductor. The radius of the charged zone (circular conductor when the conductor is circular) is creepage distance.
2. 电气元件及其组装板的安装结构应尽量考虑进行正面拆装，如有可能,元件的安装紧固件应做成能在正面紧固及松托。
2. the installation structure of electrical components and their assembly boards should be considered as possible for front disassembly. If possible, the mounting fasteners of the components should be made to be fastened and pine in the front.
3. 发热元件宜安装在散热良好的地方,两个发热元件之间的连线应采用耐 热导线或裸铜线套瓷管。YFFB扁电缆
3. the heating element should be installed in the place with good heat dissipation. The connection between the two heating elements should be made of heat resistant conductor or bare copper tube.
4. 二极管、三极管及可控硅、矽堆等电力半导体,应将其散热面或散热片 的风道呈垂直方向安装,以利散热。
4. semiconductor diodes, transistors, thyristors, silicon reactors and other power semiconductors should be installed in the vertical direction of their cooling surfaces or cooling fins to facilitate heat dissipation.
5. 电阻器等电热元件安装一般应安装在箱子的上方,安装方向及位置应考 虑到利于散热并尽量减少对其它元件的热影响。
The installation of 5. resistors and other electric heating elements should be installed above the box. The direction and position of the installation should be considered in favor of heat dissipation and minimize the heat effect on other components.
6. 柜内的 PLC 等电子元件的布置要尽量远离主回路、开关电源及变压器, 不得直接放置或靠近柜内其他发热元件的对流方向。
The PLC and other electronic components in the 6. cabinet should be arranged as far as possible from the main circuit, the switching power supply and the transformer, and must not be placed directly or near the convection direction of other heating elements in the cabinet.