Dranetz Guide Guia do Utilizador descarregar pdf (Página 21)

Dran-View 6 User Guide

Event Types The Event List displays icons for different kinds of triggered events.

Icon Event Type

Misc. waveform events

Sag (Low threshold crossed downwards)

Sag end (Low threshold crossed upwards)

Swell (High threshold crossed upwards)

Swell end (High threshold crossed downwards)

Swell-to-Sag (High and Low thresholds crossed downwards)

Sag-to-Swell (Low and High thresholds crossed upwards)

Swell-to-Severe Swell (High-High thresholds crossed upwards)

Severe Swell-to-Swell (High-High thresholds crossed downwards)

Sag-to-Interruption (Low-Low thresholds crossed downwards)

Interruption-to-Sag (Low-Low thresholds crossed upwards)

Interruption (Low and Low-Low thresholds crossed downwards)

Interruption end (Low-Low and Low thresholds crossed upwards)

Swell-to-Interruption (High, Low and Low-Low thresholds crossed

downwards)

Interruption-to-Swell (Low-Low, Low and High thresholds crossed

upwards)

Transient

Crest limit crossed

Unknown event

/ Aggregate (multi-phase) event of any type

Sags, Swells and Interruptions are usually further subdivided by duration

(Instantaneous (0.5 - 30 cycles according to IEEE 1159), Momentary (0.5 s/30

cycles depending on disturbance - 3 s according to IEEE 1159), Temporary (3 s -

1 min according to IEEE 1159), and Sustained (more than 1 min according to

IEEE 1159)). Transients may be subdivided (examples are taken from

PowerXplorer) by direction (Upstream or Downstream), severity (Mild,

Moderate, Severe), duration (Impulsive, Notch, Multiple Notch, 1/8 Cycle,

Multiple 1/8 Cycle, 1/4 Cycle, Multiple 1/4 Cycle, Half Cycle, Full Cycle), or

type (Unipolar, Bipolar, Oscillating, Arcing, Multiple Z Crossings, Notching,

Dropout, Switch On, Switch Off, Phase Shift, DC, Capswitch, Flat Top, Peak

Limit, Amplitude Change or Miscellaneous). Other event types may have other

subdivisions.

Continued on the next page

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 217 218

Dranetz Guide Guia do Utilizador Página 21