Scenario 3: Multi-rack with LVRT requirement

The figure below shows the wiring schematics for grid protection and coupling switch for three parallel-connected BAT-79, BAT-80, BAT-80 AC battery racks with LVRT requirement. You'll find a figure legend later in this section.

 

The following table is a legend for the figure above:

Legend for the wiring schematics showing multiple parallel-connected battery racks.

Number

Description

1

Public grid single-phase voltage – supplies power to the ABB CM-UFD.M31(M) grid protection device.

2

Protection fuse (or MCB) 1P, 6A – for powering the ABB CM-UFD.M31(M) grid protection device.

3

ABB CM-UFD.M31(M) grid protection device.

4

Measuring circuit input – protected by 3P, 10A fuses (or 3-phase MCBClosed Miniature Circuit Breaker) for voltage monitoring (L1, L2, L3).

5

Point of Common Coupling (PCC).

6

Protection fuses for XOLTABAT-80. See the XOLTA BAT-80 and BAT-80 AC installation manuals for specifications: https://xolta.com/manuals/.

7

Protection fuse (or MCB) 1P, 10A – for each utilised relay (R1, R2, R3) on the grid protection device.

8

Schneider Electric Acti 9 iCT 4-pole contactor – 100 A, 230 V AC coil, 4NO (used as coupling contactor per battery rack).

9

XOLTA BAT-80 is used in this example, but it can also be BAT-79 or BAT-80 AC.

10

Public grid three-phase voltage – 3 × 230V AC + Neutral.

11

Distribution terminals – for routing AC power across multiple battery racks.

12

ABB CP-C.1 24/5.0 power supply – (1SVR360563R1001), provides 24V DC.

13

ABB CP-B 24/3.0 power supply – (1SVR427060R0300), provides 24V DC.

Note: For detailed information about the ABB and Ziehl grid connections, refer to the respective device manuals.