Extra high tension
Encyclopedia
The definition of extra high tension (EHT) or extra high voltage (EHV) depends on the context of the discussion.
In electric power transmission
engineering this refers to equipment designed for more than 235,000 volts between conductors.
In experimental physics
a power supply
that provides an e.m.f. greater than 275,000 volts is known as an EHV Power Supply.
In electronics
EHT or extra high tension describes the accelerating voltage for a cathode ray tube
, typically from 15 kV to 35 kV, and the power supply
that creates this. See HT (vacuum tube)
.
In electric power transmission
Electric power transmission
Electric-power transmission is the bulk transfer of electrical energy, from generating power plants to Electrical substations located near demand centers...
engineering this refers to equipment designed for more than 235,000 volts between conductors.
In experimental physics
Experimental physics
Within the field of physics, experimental physics is the category of disciplines and sub-disciplines concerned with the observation of physical phenomena in order to gather data about the universe...
a power supply
Power supply
A power supply is a device that supplies electrical energy to one or more electric loads. The term is most commonly applied to devices that convert one form of electrical energy to another, though it may also refer to devices that convert another form of energy to electrical energy...
that provides an e.m.f. greater than 275,000 volts is known as an EHV Power Supply.
In electronics
Electronics
Electronics is the branch of science, engineering and technology that deals with electrical circuits involving active electrical components such as vacuum tubes, transistors, diodes and integrated circuits, and associated passive interconnection technologies...
EHT or extra high tension describes the accelerating voltage for a cathode ray tube
Cathode ray tube
The cathode ray tube is a vacuum tube containing an electron gun and a fluorescent screen used to view images. It has a means to accelerate and deflect the electron beam onto the fluorescent screen to create the images. The image may represent electrical waveforms , pictures , radar targets and...
, typically from 15 kV to 35 kV, and the power supply
Power supply
A power supply is a device that supplies electrical energy to one or more electric loads. The term is most commonly applied to devices that convert one form of electrical energy to another, though it may also refer to devices that convert another form of energy to electrical energy...
that creates this. See HT (vacuum tube)
HT (vacuum tube)
__FORCETOC__In vacuum tube technology, HT or high tension describes the main power supply to the circuit, which produces the current between anode and cathode...
.