goshenelectric

The basic function of DC voltage sampling box is to convert DC high voltage into low voltage that can be acquired by the Monitoring board of distribution unit. As the output of the electric power system is high voltage, the DC voltage sampling box is specially designed to realize isolation of the detecting signal from high voltage and eliminate high common-mode signal due to the floating DC output voltage. Isolation Op amplifiers are used in the DC voltage sampling box to realize signal sampling and the isolation between the high and low voltage circuits. Through linear amplification and compensation, the weak signals sampled are sent to the monitoring box of distribution unit for processing.

 

See the following table for specifications of the PFU-3DC voltage sampling box:

No.	Name	Specification	Remark
1	Power supply	±12V
2	Input voltage range	0~300V	DC
3	Output voltage	0~5V	Output adjustable