整体检定现场电流互感器检定装置的探讨

在分析各种类型现场电流互感器检定装置的数学模型基础上,探讨了其整体检定的有关问题。提出了对其整体检定用的标准器的要求:应适用于各类型的检定装置,即标准器既是电流互感器又是电压互感器,其二次负荷为空载或连接导线电阻0.02Ω,准确级为0.01S级,在最大磁导率下其一匝感应电势应不低于0.06V。整体检定的条件应尽可能符合装置检定现场电流互感器的实际工作状态,即标准器应在无补偿和匝数补偿下分别检测。唯有如此,整体检定结果才准确可靠。

Research on the Whole Certification of the Locale Device Used to Test Current Transformer

This paper analyzes the mathematical models of various types of locale current transformer calibration equipments,and explores issues related to the whole calibration.The requirements of the standard device are proposed on the whole calibration: the standard device should be applied to all types of calibration equipments,i.e.the standard device is both the current transformer and the voltage transformer,the secondary burden is no-load or the resistance of connection wires is 0.02Ω,the accuracy class is not lower than 0.01S,in the case of maximum permeability,the one-turn inductive e.m.f should not be less than 0.06V.In the whole calibration,the working conditions should be as closely as possible the actual working conditions of locale current transformer,i.e.the standard device should be used to work under no compensation and turn compensation.Thus,the whole calibration is accurate and reliable.