Page 10
© Copyright 2021 ABB. All rights reserved.
Shelves
Each shelf must include a System Controller, a Distribution Disconnect Module (DDM), and at least
one Inverter.
Shelves are available for 120 Vac and 240 Vac. Shelves and inverters are keyed. 120 Vac inverters will
only fully insert into 120 Vac shelves. 240 Vac inverters will only fully insert into 120 Vac shelves.
Input to each inverter position is wired separately via individual DC input lugs. Only the positions
in the shelf being utilized need to be wired by installers. Refer to T
-
439827E at the included with
this manual. For more information, refer to the DC Input section.
Shelf – with Controller and DDM
Input
Mounting
Output Capacity (maximum N+1)
657827E
-
23
J438827E L3
−48
Vdc
23”
120 Vac
10A
1.2 kVA
657827E
-
3
J438827E L4
−48
Vdc
19”
120 Vac
10A
1.2 kVA
150026249
J438827E L3A
−48
Vdc
23”
240 Vac
5A
1.2 kVA
150026250
J438827E L4A
−48
Vdc
19”
240 Vac
5A
1.2 kVA
657827E
-
2324
J438827E L9
+24 Vdc
23”
120 Vac
5A
0.6 kVA
657827E
-
1924
J438827E L8
+24 Vdc
19”
120 Vac
5A
0.6 kVA
System Controller
The System Controller, located in the far left slot of each inverter shelf, allows the user to monitor
real
-
time system operation such as plant voltage and plant current, and also allows system setpoints
for parameters, such as alarm thresholds, to quickly be changed with the touch of a few buttons.
Real
-
time readings may be viewed for both; the system and each individual inverter.
System Controllers in each shelf are independent.
Refer to the System Controller segment in the Features Reference section.
Distribution Disconnect Module (DDM)
The Distribution Disconnect Module (DDM), located to the right of the System Controller, provides an
AC disconnect and shelf distribution monitoring via the Distribution Monitor (DM). The AC
disconnect is a circuit breaker that provides overload protection and fault isolation. The DDM works
with the System Controller to monitor shelf operation.
Maintenance Bypass Panel (MBP)
A maintenance bypass panel is optional for the 827E. Refer to the J
-
Drawing (J438827E L51 and L52).
The main purpose of the MBP is to allow an AC load to be switched from its primary source (827E
Inverter Plant) to an alternate source (AC Line) and back to the primary source (827E Inverter Plant)
again. This may be required, for example, when doing maintenance or upgrades to the Inverter Plant.
L51 and L52 MBPs provide mechanical bypass via contactors.
The MBP includes alarm aggregation of alarm signals from 1 to 4 shelves. The MBP provides
integrated alarm signals from a multi
-
shelf, frame system by combining alarm signals from
individual shelf System Controllers.
Input
Output Capacity
Inverter
SI10A120PME
J438827E L11
−48
Vdc
120 Vac
10A
1.2 kVA
SI5A240PME
J438827E L17
−48
Vdc
240 Vac
5A
1.2 kVA
SI5A120PME
J438827E L14
+24 Vdc
120 Vac
5A
0.6 kVA
3
N+1 output: a shelf fully populated with inverters where the output of a single redundant inverter is not included.