| 1. | Phase meters , power factor mters and synchroscopes
相位表功率因数表和同步指示器 |
| 2. | Intelligent ac power factor meter
智能交流功率因数表 |
| 3. | Three phase power factor meter
三相功率因数表 |
| 4. | The laboratory can provide calibration for 50 or 60 hz single - phase power factor meters with measuring range from zero to unity , leading or lagging
功率因数表本所可为频率为50或60hz而测量量程由零至一超前或滞后的单相功率因数表提供校正服务。 |
| 5. | Direct acting indicating analogue electrical measuring instruments and their accessories part 5 : special requirements for phase meters , power factor meters and synchroscopes
直接动作指示模拟电气测量仪器及其附件.第5部分:相位表功率因数表和同步示波器的特殊要求 |
| 6. | Direct acting indicating analogue electrical measuring instruments and their accessories . part 5 : special requirements for phase meters , power factor meters and synchroscopes
直接作用模拟指示电测量仪表及其附件第5部分:相位表功率因数表和同步指示器的特殊要求 |
| 7. | Direct acting indicating analogue electrical measuring instruments and their accessories . part 5 : special requirements for phase meters , power factor meters and synchroscopes
直接动作指示模拟电气测量仪器及其附件.第5部分:相位表功率因数表和同步指示器的特殊要求 |
| 8. | Direct acting indicating analogue electrical measuring instruments and their accessories - specification for special requirements for phase meters , power factor meters and synchroscopes
直接指示模拟电工测量仪表及其辅助设备.第5部分:相位表功率因数表和同步指示器的特殊要求规范 |
| 9. | Calibration will be made by applying appropriate sinusoidal voltage and current signals with known phase relationship to the meter under test . the ranges of test voltages and currents are 25 v to 250 v and 50 ma to 100 a respectively
按已知的相位关系，将适当的正弦电压及电流讯号加于接受测试的功率因数表，以进行校正。测试电压及电流量程分别为25v至250v及50ma至100a 。 |
| 10. | A new full - wave measurement circuit structure is put forward that would increase distribution automation system reliability and veracity . the distributed protection and monitoring unit in this paper can instead of general instruments of low voltage distribution system . it not only combines ampere meter , voltage meter , active power meter , reactive power meter and power meter , frequency meter into a meter , but also increases monitoring position switch , control bus switching alternately and monitoring energy
本文研制的保护和测控单元，可替代低压配电系统中所使用的常规仪表，将原来回路需要的电流表、电压表、有功功率表、无功功率表和功率因数表、频率表简化为一块表，并增加了位置开关量检测，控制母线投切和电度监测功能，从而极大的简化了低压配电二次仪表设计、安装调试，提高了运行、维护和管理水平。 |
