High voltage B

The field high voltage B (or HTB ) relates to the installations electric S in which the tension exceeds 50  000  Volt S in Alternative course or exceeds 75  000  volts in D.C. current.

Although the terms are not standardized, one indicates by

- extra-high tension: the tensions in alternative course which are higher than 300 Kv and lower or equal to 800 Kv
- ultra-high tension: the tensions in alternative course which are higher than 800 Kv. There exist currently projects 1100 Kv in China and 1200 Kv in India. In the years 1990, there was a very advanced project 1100 Kv with the Japan with tests of prototypes, but to date it was exploited only in 550  Kv.

See too

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