Fonctions/Maint. Soustens - gefran ADV200 Instructions D'utilisation

Si le signal n'est pas activé, cela signifie qu'il n'y a pas de courant (Tension réseau pas OK), par contre, si le
signal est activé cela signifie qu'il y a du courant (Tension réseau OK).
Dans les conditions par défaut, l'origine du signal Perte Alim src est Zero.
L'utilisateur doit connecter un capteur externe, informant le drive quant à la condition de la tension du réseau.
Si la fonction est configurée en Perte Alim mode = Restart, lorsque le signal de présence alimentation s'active
(Tension réseau OK) le drive arrête la rampe de décélération et se place sur la consigne paramétrée.
En cas d'une machine ayant plusieurs driver, le signal du capteur externe doit être connecté uniquement au drive master.

22.11 - FONCTIONS/MAINT. SOUSTENS

In case mains voltage dip, the UV Ride-Through function (available on V/f mode only) operates by the way to recover
the kinetic energy of the load into the DC link of the drive. The DC link is kept at a sustainable level as long as possible.
In case the mains voltage is restored, the drive will get back to its normal operation according to PAR 3286 setting.
UV RT off
Vdc
(PAR 3284)
Vdc setpoint
Vdc threshold
(PAR 3282)
Output frequency
(PAR 254)
Motor torque
(PAR 2342)
0%
After an input power loss (Mains loss), the DC link voltage (Vdc) drops. When the DC voltage gets below the Vdc
threshold, the drive decreases the speed reference.
The torque of the motor change its sign moving from positive to slightly negative (generator) recovering the kinetic
energy into the DC link.
The UV Ride-Through controller decreases the output frequency as needed to keep the DC link voltage at an appro-
priate level (Vdc setpoint).
When the mains voltage is restored to its rated value, the DC link voltage rise up over the Vdc setpoint and the drive
output frequency returns to follow the speed reference.
Mains voltage restore can be identified automatically or by external digital signal.
When the mains voltage is restored to its rated value, the drive recognizes the situation and the output frequency
returns to follow the speed reference using the acceleration time as for the customer setting.
During the Ride-Through operation, the drive detects a "Warning" condition (without opening the Drive OK relay).
Otherwise if the mains voltage is not restored, the controller further decreases the drive output frequency till the motor
stops. At this point the drive detect an "Sous tension" alarm opening the Drive OK relay.
It is possible to set a Maintien.ST Kpme out. In case the mais voltage is not restored within this time, the function stops
to control the DC link voltage and the drive detect an "Sous tension" alarm opening the Drive OK relay.
The MAINT. SOUSTENS controller decreases the speed reference with a rate that depends on the inertia, friction and
load with the goal to keep the DC link level at thel Vdc setpoint.
According to this rate, the longer is the time of power loss, the grater is the decrease of speed.
This behavior may eventually negatively affect the material production.
To optimize the function, it is recommended to change the drive's minimum operating voltage setting from the default
value to the minimum value (see PAR 450 Sous tension, 4 – CONFIGURATION menu).
134
Mains loss Mains restoring
ADV200 • Description des fonctions et liste des paramètres