Phase Isolation Bus Bar Bellows or Rubber Expansion Joints are generally located at the end of the system (at the connections to machines or cubicle) or along the system when switches are inserted or when a removable expansion is needed.
The bellows ensure the continuity of the seal between the end of the envelope and the aluminum sleeve fixed on the flask of the machines.
They ensure an electric insulation between these two parts and allow a thermal dilation while absorbing the vibrations of the machines.