单相工频相位表(功率因数表)

单相相位表是交流电路中用于测量频率相同的电流与电压之间相位差的专用仪表，单相相位表根据其测量功能的不同分为相角表和功率因数表。相角表主要用于测量同频交流与电压之间的相角差，所指示的是相位角度，示值单位为度；功率因数表用于测量电流与电压之间相位角余弦，所指示的是功率因数值，无量纲。为了向山西省提供公正准确权威的单相相位表的第三方校准数据，特开展此项目。

A single-phase phase meter is a specialized instrument employed in alternating current (AC) circuits to measure the phase difference between current and voltage with identical frequencies. Single-phase phase meters are classified into two types according to their measurement functions: phase angle meters and power factor meters. Phase angle meters are primarily used to measure the phase angle difference between current and voltage of the same frequency, displaying the phase angle with the unit of degree. Power factor meters are designed to measure the cosine of the phase angle between current and voltage, showing the power factor value which is dimensionless. This project was specifically launched to provide impartial, accurate and authoritative third-party calibration data for single-phase phase meters in Shanxi Province.