The principle and main function of intelligence protection unit, PCS control equipment, in GIS on-site control cabinet, are introduced in this paper.

Composite water flow Calibration Facility that our unit designed, makes up of standard metal tank group, standard flow meter, water-supply system, pipeline system, control cabinet and diverter mainly.

The unit cabinet and the control cabinet adopt an integrated optimization design; and the right side of the control cabinet is provided with a door.