Transformers can convert a high transmission voltage to a lower voltage for use by customer loads.

Its transmission voltage of 533 kV was the highest in the world at the time.

At very high transmission voltages even a close approach can be hazardous, since the high voltage may spark across a significant air gap.

Near the loads, the transmission voltage is stepped down to the voltages used by equipment.

Later tests were carried out with transmission voltage up to 25,000 volts (between phases).

The value of the transmission voltage remained unchanged at 450 kV.

However, the cost of burying and maintaining cables at transmission voltages is several times greater than overhead power lines.

Initial studies showed that transmission voltages could be reduced to less than 300 Volts, mitigating arcing effects.

The second was that the system's geographic growth and the evolving state of electrical technology created a need for higher transmission voltages.

Such methods can be applied to enable safe work at the highest transmission voltages.