网站转让

工作原理 Working principle editor 在 发电、 变电、输电、 配电和 用电的线路中电流大小悬殊，从几安到几万安都有。为便于测量、保护和控制需要转换为比较统一的电流，另外线路上的电压一般都比较高如直接测量是非常危险的。电流互感器就起到电流变换和电气隔离作用。 There is a wide range of electric current in power generation, electricity transmission, transmission, distribution and power lines, from several to tens of thousands. To facilitate measurement, protection, and control needs to be converted into a more uniform current, the voltage on the other line is generally high, such as direct measurement is very dangerous. Current transformers act as electrical current and electrical isolation. 对于指针式的 电流表，电流互感器的二次电流大多数是安培级的（如5A等）。对于数字化仪表，采样的信号一般为毫安级（0-5V、4-20mA等）。微型电流互感器二次电流为毫安级，主要起大互感器与采样之间的桥梁作用。 For a pointer galvanometer, the secondary current of current transformer is mostly ampere-level (e.g. 5A, etc.). For digital instruments, the sampled signals are typically milliampere (0-5v, 4-20ma, etc.). The secondary current of miniature current transformer is milliampere, which mainly ACTS as a bridge between the large transformer and the sampling. 微型电流互感器也有人称之为“ 仪用电流互感器”。（“仪用电流互感器”有一层含义是在实验室使用的多电流比 精密电流互感器，一般用于扩大仪表 量程。） Miniature current transformer is also known as "instrument current transformer". (the "instrument current transformer" has a meaning that the multi-current transformer used in the laboratory is more than the precision current transformer, which is normally used to expand the instrument range.)