7
ENGLISH
DELPHYS MX 250-900
- Ref.: OPMDELMX1010-GB_01
3. GENERAL
3. 3. S
Afety
CAUTION
The equipment can only be switched on or used if the following conditions are fulfilled:
•
electrical connections comply with the regulation in force (earth bonding, appropriate protections and cross-
section of cables)
•
all means to comply with the protection index of the system are in place, such as side panels, doors,
glands, shields or whatever....
ADVICE
•
carefully follow the instructions described in this manual.
•
all operations must only be carried out by personnel who are suitably trained and with authorized ac-
cess to restricted areas.
CAUTION
Do not forget that even when the load is stopped the unit is live:
•
because of the mains voltage, the rectifier and the bypass.
•
because of the voltage generated by the battery and by the rectifier.
•
because of the load voltage when the maintenance bypass Q5 is closed and the bypass mains is present.
DANGER
any operation inside the cabinets is to be completed:
•
once the upS is stopped and no longer live
•
after 5 minutes, the time for the capacitors upstream of the rectifier and inverter to discharge.
the residual voltage of the capacitors may still cause heavy electrical arcs after 5 minutes.
H
AzARD
INDICATION
While the UPS is operating, this label indicates that the parts are live and therefore the risk of electrical hazard.
all operations behind protection panels must only be carried out by personnel who are suitably trained.
3. 4. p
ower
S
upply
i
nputS
Three power supply inputs are needed to operate the system:
•
voltage on input 1 for the supply to the rectifier,
•
voltage on input 2 for the supply to the automatic bypass (depending on the system, inputs 1 and 2 can be common),
•
the DC voltage for the battery (about 500Vdc).
