逆相序 meaning in English

negative phase sequence

This paper describes mainly system functions , measuring methods , circuit design , software program and errors analysis of a new type of measuring instrument . this instrument can measure and monitor electric parameters in single - phase circuits , three - phase ( three - wire or four - wire ) circuits . this system can be applied to electric devices and power plants , transformer substations with harmonic pollution . it can measure current , voltage , power , energy , frequence , power factor etc . it also can detect load quality , phase sequence , alarm , display and print results , as well as detect and dispose negative power
该仪器适用于含有谐波污染情况下的机电设备现场、发电厂、供电局、企业变电所现场，可用来测量电流、电压、有功功率、无功功率、视在功率、有功电能、无功电能、视在电能以及频率和功率因数等电参数，并具有负载性质（感性、容性）判别，正、逆相序判别指示功能；超限报警功能；打印记录功能和负功检测及处理功能。