Delta Amplon RT Series User Manual page 35

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.
-Isolate Uninterruptible Power System (UPS)
-Then check for Hazardous Voltage between all terminals
Backfeed Protection Device Requirements:
z
z
UPS
5/ 6kVA
8/ 10kVA
Control Relay Requirements:
z
z
Breaking Capacity
Contact Form
Coil
Suggested Model No.
Backfeed Protection Wiring Diagram:
z
z
Please refer to the diagram below to install the backfeed protection device
between the AC input and the UPS.
Before Working on This Circuit
including the protective earth.
Risk of Voltage Backfeed
Suggested Backfeed
Protection Device
Rating Voltage/ Current
208/ 220/ 230/ 240Vac; 40A
208/ 220/ 230/ 240Vac; 65A
3 1
Chapter 7 Connection and Wiring
Suggested Model No.
AF52-30-13 (ABB)
AF52-30-13 (ABB)
240Vac/ 5A
Normally Closed (NC)
12Vdc/ <0.5A
HF13F-012-1Z1T