Cooling and Dehumidifying Coils, has expanded coil construction descriptions and new maintenance recommendations.

All standard coils are mechanically expanded copper pipes plus aluminum fins. The surface cooling section is equipped with a pitched discharge coil to ensure complete discharge of condensed water.

The cable outlets for 10kV distribution network system are added and the network is continuously expanded, the system principle of the netural point though arc suppression coil grounding is analyzed.