EATON XSTORAGE COMPACT INSTALLATION MANUAL
P-16400097 - September 2020 www.eaton.com
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3.2
Looking inside the Eaton xStorage Compact 20 kW - 40 kW
Figure 3. Front view of the the Eaton xStorage Compact 20 kW - 40 kW
1
Door latch
7
20 kW ECM power modules
2
Application controller touch screen display
8
Maintenance bypass switch (MBS) (optional)
3
Communication box (system controller)
9
230Vac Aux. voltage, F1 and F2
4
Front panel of the communication box
10
Battery breaker, CB1 (internal)
5
Communication interfaces
11
Primary battery pack
6
Mains switch
12
Battery pack
3.3
Battery system
The battery system includes:
•
internal batteries (1 battery string)
•
external batteries (external battery rack with up to 2 battery strings)
A string includes 4 battery packs and 1 primary battery pack, a total of 5 packs in series. The xStorage
Compact unit contains 1 battery string. The external battery rack can contain 1 or 2 strings (1 primary
battery pack and 4 or 9 battery packs). With the external battery rack, the energy capacity can be tripled,
see
Table 2. Number of battery strings based on energy capacity
.
Each battery pack is a combination of several battery modules, fuse and sensors internally connected to
a battery management system (BMS). The BMS manages the complete battery pack by monitoring its
state, voltage, current and temperature, calculating secondary data, SOC, reporting that data, protecting
the battery, monitoring its environment and balancing cells.
The main difference between the primary battery pack and a battery pack is the capability to open the
string contactor in case of alarms/events on a string of battery packs. The primary battery pack has two
independent contactors for two parallel battery strings.