Circutor AR6 Series Manuel d'utilisateur télécharger pdf (Page 40)

AR6 portable network analyzer

Page 40 of 69 User Manual

11.4.1 Events grouping in accordance with UNIPEDE criteria

- In three-phase systems a swell starts when the value U

RMS

of the voltage of one or more

phases exceeds the set-point for detecting an over-voltage (usually 110% of rated value); it

ends when the value U

RMS

for all the phases is less than or equal to the set-point minus the

configured hysteresis value (t0)

Fig.11-9.- Start and end of a swell in a three-phase system

- In three-phase systems a sag starts when the value U

RMS

of the voltage of one or more

phases is below the threshold for detecting sags (usually 90% of rated value); it ends when

the U

RMS

is greater than or equal to the threshold plus the configured hysteresis value (t1)

or if all phases are below the interruption level (usually 10% of rated value).

Fig.11-10.- Start and end of a sag in a three-phase system

- In three-phase systems an interruption starts when the value U

RMS

of the voltage of all the

phases is below the threshold for detecting interruptions (usually 10% of rated value); it

ends when the value URMS of any phase is greater than or equal to the threshold plus the

configured hysteresis value (t2).

Fig.11-11.- Start and end of an interruption in a three-phase system

In the values shown for the individual phases, the time shown refers to each event; no

grouping is done.

The available dynamic menu options for the UNIPEDE table screen are:

1 2 ... 35 36 37 38 39 40 41 42 43 44 45 ... 68 69

Pas de commentaire

Circutor AR6 Series Manuel d'utilisateur Page 40