With bar primary conductor so constructed that it can be used as a bushing
Without primary conductor but with primary insulation of their own , which can be used as a bushing.
Arranged to act as a support for the conductor in the primary circuit
Without primary conductor, but with primary insulation which can be fitted directly over a conductor or busbar.
Without primary conductor and primary insulation of their own, which can be mounted over an insulated cable.
Outlets of generator, summation CTs,..
Can be used under outdoor service conditions ( ambient air temperature, humidity, pollution,...)