APPENDIX C: SYSTEM WIRING DIAGRAMS
Single-Phase Service (TN Network)
Diagram Overview
This diagram illustrates the single-phase wiring configuration for a Tesla Powerwall 3 system operating within a TN network. It details the connections between key components including the supplier meter, Backup Gateway 2, AC Line Filter, and Powerwall 3 unit, as well as the distribution boards for both essential and non-essential loads.
Component Connections
Supplier Meter: The primary connection point for incoming power.
Site RCBO (where RCD or RCBO required): Connected between the supplier meter and the Backup Gateway 2, providing overcurrent and residual current protection.
Local Earth Rod: Connected to the system for grounding.
Backup Gateway 2: A central component managing power flow. It receives input from the supplier meter and distributes power to various loads and the Powerwall 3.
Non-backup distribution board: This board distributes power to non-essential loads, connected to the Backup Gateway 2.
AC Line Filter: Located in an enclosure, this filter is connected to the Powerwall 3, likely to condition the AC power.
Powerwall 3: The energy storage unit, connected via the AC Line Filter and receiving power from the Backup Gateway 2.
Powerwall RCBO (where RCD or RCBO required): Connected to the Powerwall 3, providing protection for the unit.
Backup distribution board: This board distributes power to essential loads, connected to the Powerwall 3.
Non-essential loads: Connected to the non-backup distribution board.
Essential loads: Connected to the backup distribution board.
Wiring Details
The diagram shows distinct color-coded wiring for different circuits:
- Red wires typically represent Line (L) connections.
- Black wires typically represent Neutral (N) connections.
- Green wires typically represent Earth (PE) connections.
Specific connections are shown between each component, indicating the flow of electricity for normal operation and backup power scenarios.
