Operating voltages below 440 volts are called as low tension systems. In this system there are many kinds of panels.
The panels, that are mainly used to control the powers are called PCC panels. The sizes of the panels depends upon the amount of current it handles.
Almost all types of industries requires these types of the panels.
The range is right from 16 A to 10,000 A, There is one incomer of proper capacity and many out goings feeders for these panel.
The switchgears may be Air circuit breakers ( ACB ) OR Molded Case Circuit Breaker ( MCCB ) OR Switch Disconnector Fuse unit (SDF).
The bus bars may be of electrolytic grade Copper strips or Aluminum strips.
Generally in india aluminum strips are mostly used as the cost is somewhat cheaper than copper.