WEG MVW3000 A0040 V023, User Manual

Page: 57 / 125

MVW3000 | 6-17
6
Installation, Connection and Energization
ATTENTION!
If the inverter receives a general enabling or a start command before the pre-charge has been finished
(inverter still in undervoltage state), the command will be ignored and a warning message “inverter
undervoltage” will be displayed on the HMI.
6.3.4 Safe De-energization Instructions
DANGER!
„
Although the inverter commands the opening of the input cubicle, there is no guarantee of its opening
and neither that no voltages are present, because the capacitors remain charged for a long time
and they can also be charged through the auxiliary supply (pre-charge).
„
In order to open the medium voltage cabinets, follow all the safe de-energization procedures
described next.
DANGER!
„
Bien que l'onduleur commande l'ouverture de l'armoire d'entrée, il n'y a aucune garantie de son
ouverture et ni qu'aucune tensions sont présentes, parce que les condensateurs rester chargé
pendant un long moment et ils peuvent également être facturés par le biais de l'alimentation
auxiliaire (pré-charge).
„
Pour ouvrir les armoires moyenne tension moyenne, suivez toutes les procédures de mise hors
tension de sécurité décrites ci-dessous.
1. Decelerate the motor to a complete stop.
2. See the DC link voltage of the installed power cells at parameters P1000 to P1031 on the HMI.
3. Press the “POWER OFF” pushbutton. The input transformer cubicle is switched off at this moment, and the
“INPUT ON” pilot light going off indicates it.
ATTENTION!
If the input transformer cubicle does not open with the “POWER OFF” command, then open it
manually.
4. Monitor the DC link voltage decrease through the respective parameters on the HMI. Even with the indication
of zero volt, wait for ten minutes so as to ensure the full discharge of the DC link capacitors.
5. Press the emergency pushbutton located on the control column door and remove its key.
6. At the input transformer circuit breaker cubicle, extract the circuit breaker from its operation position and close
the transformer primary winding grounding switch. Lock the cubicle with the key and/or put a warning sign
“System in maintenance”.
7. Switch off the Q2 circuit breaker in the control column and lock it in the open position with a padlock and/or
put a warning sign “System in maintenance”.
8. Switch off the Q1 circuit breaker in the control column. Remove the auxiliary power supply.
It is only after the sequence of procedures here that medium voltage compartment doors can be opened.
DANGER!
Even after the DC link voltage parameters indicate 0 V on the HMI, 250 V may still be present on the
DC link of the power cells. Wait for ten minutes, and the cabinet doors may be opened.
DANGER!
Même lorsque les paramètres de tension du câble CC indiquent 0 V sur l’IHM, une tension de 250 V
pourra malgré tout être présente sur le bus CC des batteries.
Merci d’attendre dix minutes et les portes de l’armoire devraient s’ouvrir.