Delta Amplon Series User Manual page 41

1. Turn of the UPS and cut off both AC source and the battery source before
connection.
2. Calculate the power consumption of the loads to avoid an overload
condition.
3. Ensure that the screws are tightly fixed after connection. Please refer to
Table 7-1.
Backfeed Protection:
4
When the UPS runs in battery mode or during AC power failure, the UPS's
inner voltage or energy might be fed back to the input terminals, either directly
or via a leakage loop. To avoid the risk of electric shock resulted from the
backfeed, installation of a backfeed protection device between the AC input
and the UPS is highly recommended.
NOTE :
1. The UPS doesn't have any built-in backfeed protection device.
Installation of the backfeed protection device between the AC input
and the UPS is highly recommended.
2. If there is no backfeed protection device installed between the AC
input and the UPS, please (1) attach a warning label on the switch
or breaker that controls the AC power supplying to the UPS, and (2)
check if any hazardous voltage exists on any terminals connected to
the AC power. The warning label shall carry the following wording or
equivalent.
-Then check for Hazardous Voltage between all terminals
Backfeed Protection Device Requirements:
z
z
UPS
5/ 6kVA
Before Working on This Circuit
-Isolate Uninterruptible Power System (UPS)
including the protective earth.
Risk of Voltage Backfeed
Suggested Backfeed
Protection Device
Rating Voltage/ Current
208/ 220/ 230/ 240Vac
40A
3 7
Chapter 7 Connection and Wiring
Suggested Model
AF52-30-13 (ABB)
No.