Ac Output; Figure 10 Ac Output Connections; Table 3 Recommended Wire And Terminals For Ac Output - ABB 827E Product Manual

AC Output

Refer to Figure 10.
1. Rear cover should already be removed from installing the DC input.
2. Make sure AC Load Disconnect Breaker is "OFF" (located on the Distribution Disconnect Module).
3. Remove a conduit knockout from the right side of the plant (as facing the rear of the plant) (there are two
openings; one on the back right and one on the bottom right). If wiring to an MBS or AC distribution panel, use
the wire-way.
4. Refer to Table 3 for recommended wire and terminal sizes for connecting the AC outputs.
5. Connect the AC outputs via the terminal block located near the bottom right corner on the rear of the system.
Terminal Amperage or Stud Size
1/4" Screw Terminal
(Term Block rated for 85 amps)
6. Replace rear cover.
The modular nature of the system allows individual inverters to work in parallel (load share). By
calculating the actual load and adding 1 additional inverter the system will be configured for "N+1"
redundancy, adding a second would be N+2, etc. When configured in this fashion, if an inverter fails,
the system will not go into current limit. It will seamlessly continue to supply the needed power.
Example with 10 A Inverters:
ac
Power output needed = 100 amps = 10 x –48 Vdc 10 A
N + 1 = 11 Install 11 x –48 Vdc 10A inverters for N+1 redundancy.
Example with 5 A Inverters:
ac
Power output needed = 25 amps = 5 x +24 Vdc 5 A
N + 1 = 6 Install 6 x +24 Vdc 5 A
Page 21
© Copyright 2021 ABB. All rights reserved.
Recommended
Terminal Type
Wire Size
Compression 6 AWG

Table 3 Recommended Wire and Terminals for AC Output

Figure 10 AC Output Connections

inverters.
ac
Over Current Protection
(Located in Distribution Monitor)
100A CB for 19-inch system or
100A CB for 23-inch system
inverters N = 10
ac
inverters N = 5
ac
Conduit Size
1"
Conduit
Openings for
AC Output
AC Output
Terminal Block