SPDC Terms beginning with W

Terms and definitions extracted from current SPDC published documents
Click one of the capital letters above to advance the page to terms beginning with that letter.
wave

The variation with time of current, potential, or power at any point in an electric circuit.
[62.37-1996]

wave

The variation with time of current, potential, or power at any point in an electric circuit.
[C62.11-2005]

wave front (of a surge or impulse)

That part that occurs prior to the crest value.
[C62.11-2005]

wave front (of an impulse)

That part of an impulse that occurs prior to the crest value.
[C62.22-2009]

wave shape

The graph of the wave as a function of time.
[62.37-1996]

wave shape (of an impulse test wave)

The graph of an impulse test wave as a function of time.
[C62.22-2009]

wave shape (of an impulse test wave)

The graph of the wave as a function of time.
[C62.11-2005]

wave shape designation (of an impulse)

The wave shape of an impulse (other than rectangular) of a current or voltage is designated by a combination of two numbers. The first, an index of the wave front, is the virtual duration of the wave front in microseconds. The second, an index of the wave tail, is the time in microseconds from virtual zero to the instant at which one-half of the crest value is reached on the wave tail. Examples are 1.2/50 and 8/20 waves.
The wave shape of a rectangular impulse of current or voltage is designated by two numbers. The first designates the minimum value of current or voltage that is sustained for the time in microseconds designated by the second number. An example is the 75 A 1000 μs wave
[C62.22-2009]

wave shape designation (of an impulse)

1) The wave shape of an impulse (other than rectangular) of a current or voltage is designated by a combination of two numbers. The first, an index of the wavefront, is the virtual duration of the wavefront in microseconds. The second, an index of the wave tail, is the time in microseconds from virtual zero to the instant at which one-half of the crest value is reached on the wave tail.
Examples are 1.2/50 and 8/20 waves.
2) The wave shape of a rectangular impulse of current or voltage is designated by two numbers. The first designates the minimum value of current or voltage that is sustained for the time in microseconds designated by the second number.
An example is the 75 A 1000 μs wave.
[62.37-1996]

wave shape designation (of an impulse)

(A) The wave shape of an impulse (other than rectangular) of a current or voltage is designated by a combination of two numbers. The first, an index of the wave front, is the virtual duration of the wave front in microseconds. The second, an index of the wave tail, is the time in microseconds from virtual zero to the instant at which one-half of the crest value is reached on the wave tail. Examples are 1.2/50 and 8/20 waves.
(B) The wave shape of a rectangular impulse of current or voltage is designated by two numbers. The first designates the minimum value of current or voltage that is sustained for the time in microseconds designated by the second number. An example is the 75 A 1000 μs wave.
[C62.11-2005]

wave tail (of an impulse)

That part between the crest value and the end of the impulse.
[C62.22-2009]

wave tail (of an impulse)

That part between the crest value and the end of the impulse.
[C62.11-2005]

wave tail (of an impulse)

That part between the crest value and the end of the impulse.
[62.37-1996]

waveform

A manifestation or representation (that is, graph, plot, oscilloscope presentation, equation(s), table of co-ordinate or statistical data, etcetera) or a visualization of a wave, pulse or transition.
[62.37-1996]

wavefront (of a surge or impulse)

That part which occurs prior to the crest value.
[62.37-1996]

withstand voltage

The voltage that an insulation is capable of withstanding. In terms of insulation, this is expressed as either conventional withstand voltage or statistical withstand voltage.
[C62.82.1-2010]

withstand voltage

The voltage that an insulation is capable of withstanding with a given probability of failure. In terms of insulation, this is expressed as either conventional withstand voltage or statistical withstand voltage.
[C62.22-2009]

withstand voltage

The voltage that an insulation is capable of withstanding. In terms of insulation, this is expressed as either conventional or statistical withstand voltage.
NOTE: See IEEE Std 1313.1-1996.
[C62.11-2005]