Many high-voltage direct current systems using submarine power cables are single wire earth return systems.

The high-voltage alternating-current system has many advantages over direct current.

Counterpoises are also used in high-voltage systems, such as lightning rods and Tesla coils.

BMW may be the first to introduce the new high-voltage systems.

Soon after the turn of the century a single-phase high-voltage system was marketed to railroads.

Even then, the manual warns, the high-voltage system holds a charge for five minutes.

As the high-voltage system has to be safe, Mr. Pfister tested a set by adding extrahigh voltage.

Spear was to have gathered data on a high-voltage system producing one million watts of electricity for powering space weapons.

For high-voltage systems, the same air supply is used to "blow out" the electric arc when roof-mounted circuit breakers are used.

Explorers and later vehicles with the high-voltage system will have a 42-volt battery in addition to the 12-volt battery found in cars today.