The design adopts ac sample method to get 3 - phase voltage and current samples . the design computes three basic electric parameters according the sample values and monitors the voltage and current of pumping machine with keyboard and lcd 对抽油机工作电压、电流进行数据采集,用方均根值法由交流采样值计算三个基本电参数,并通过lcd和键盘进行随时的监测。
3.
Capacitance between any two terminals in the installation should no more than 1 . 06 . 3 . insulation level of installation : for rated voltage of 6kv installation , it can endure 23kv rms for 1 min between the phrase to phrase or phrase to earth of main circuit ; for rated voltage of 10kv installation , it can endure 30kv rms for 1 min between the phrase to phrase or phrase to earth of main circuit ; it can be endure 2kv rms for 1 min between auxiliary circuits of installation 3 .装置的绝缘水平： 6kv额定电压的成套装置，其主电路相间及相与地之间，工频耐受电压方均根值23kv , 1min 10kv额定电压的成套装置，其主电路相间以及相与地之间，工频耐受电压方均根值30kv , 1min成套装置辅助电路工频耐受电压方均根值2kv , 1min 。
