Wöhner, one of the leaders in busbar system technology, is continually enhancing its 40mm systems. All switching devices on the busbar system can now be controlled using the EQUES®ControlSystem (see Chapter 5). Compact 3-pole, 4-pole and 5-pole assemblies can be constructed using short busbar adaptors and Quadron®VolBreaker fuse switch disconnectors, which are available in sizes 000 to 1.