GB/T 13850-1998

This standard specifies the performance requirements, test methods, and accuracy classifications for transducers that convert alternating current (AC) electrical parameters—such as voltage, current, power, or frequency—into standardized analog signals (e.g., 4-20 mA) or digital outputs. It is primarily applied in industrial automation, power system monitoring, and energy management for ensuring reliable signal conversion between AC power grids and measurement, control, or data acquisition equipment. The standard also governs calibration and verification procedures used by metrology laboratories and manufacturers to guarantee measurement consistency and interoperability.