Scenario 2: Single or multi-rack with LVRT requirement

The figure below shows the wiring schematics for grid protection and coupling switch for a single or multiple battery racks and with LVRT requirement. You'll find a figure legend later in this section.

A diagram of a machine Description automatically generated

The following table is a legend for the figure above:

Legend for the wiring schematics showing single or multi-rack with LVRT

Number

Description

1

Single-phase 230V AC supply from the public grid – powers the ABB grid protection relay.

2

Protection fuse (or MCBClosed Miniature Circuit Breaker) 1P, 6A for the ABB CM-UFD.M31(M) grid protection device.

3

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

4

Voltage measuring circuit – protected by 3P, 10A protection fuses (or 3-phase MCB), connected to L1, L2, L3 inputs of the CM-UFD.M31(M).

5

Point of common coupling (PCCClosed Short for "Point of Common Coupling". The PCC is the connection point between a generating facility (e.g., a battery system) and the utility grid, where power exchange occurs.).

6

Protection fuses for the connection between grid and XOLTABAT-80/BAT-80 AC. 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) of the CM-UFD.M31(M).

8

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

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.

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.