He urged Parliament to help create a bipolar system that would be more stable.

A bipolar system may also be installed with a metallic earth return conductor.

One could move away from a straightforward 'bipolar' system, in which each side has only one of two options.

The sea cable is planned as a bipolar system with earthing through the return cable.

Realists present it as the natural response to a bipolar international system.

"The concluding years of the 20th century are marked by world events that have replaced the previous bipolar system by a new order," he said.

Both bipolar systems have extensive ground return electrodes to allow use in monopolar mode.

He was suspicious of the bipolar system, which, in his view, increasingly reflected nothing more than the national interests of the two superpowers.

Hitler manipulated the bipolar system to keep ultimate decisions in his own hands.

With bipolar systems a conductor arrangement with one conductor on each side of the tower is used.