G Corner designs and manufactures a range of unique endcell and intercell busbars for electro-refining and electrowinning applications.
The aim of the Intercell busbar is to transfer the DC Electrical current efficiently between each cell in the circuit.
The size of the intercell busbar is dependent on the current capacity required, the height requirement of the electrodes from the cell-top, the physical size of the supporting cell wall and length of the refining cells.
The intercell busbars can be designed to accommodate different hanger bar configurations for the electrodes. Electrode hanger bars can either be of a symmetric or asymmetric design leading to the required corresponding format for the intercell busbars and associated cell-top furniture.
To offer the most efficient electrical performance the intercell busbars are produced as one continuous copper extrusion to ASTM B187 Grade UNS C11000. This will give a conductivity well in excess of the minimum requirement as detailed in the standard, ensuring a low electrical resistance between the cells and minimising any power losses.
Dependent on the application the busbars can be machined with slots to take the anode and cathode hanger bars or can be an un-machined plain extrusion with the hanger bars simply resting on the busbar. In addition, an auxiliary current equalisation busbars can be added ensure an even current distribution across each intercell arrangement, resulting in a equal distribution of electrical current through the cathodes in the cell.
G Corner endcell busbars, also known as ‘Apron Busbars’, are designed to have a number of key functions:
- To connect with the multiple riser busbars, which are transmitting the current up from the main trunk busbars
- To provide an effective connection and current distribution system for the DC electrical current coming from the main trunk busbar system to the tankhouse electrodes
- For electrowinning applications, they provide a location for the tankhouse shorting frame, which will position the anode/cathode contact of the shorting frame on the endcell busbar
The endcell busbars are normally produced from large copper plates manufactured to ASTM B152 Grade UNS 11000 giving excellent mechanical and electrical properties. These busbars can be extensively machined to tight tolerances for electro-positioning and for the connection points for the main riser busbars.