Introduction
This document provides a quick start guide for the Fronius Backup Switch 1P/3P-63A. It covers essential safety information, installation, wiring, and configuration.
For detailed information, please refer to the full operating instructions available at https://manuals.fronius.com/html/4204260536.
Important Safety Information
WARNING! Incorrect operation or poorly executed work can cause serious injury or damage. Installation and commissioning must be carried out by trained personnel in accordance with nationally applicable standards and guidelines. Before working with the device, ensure that you have read and understood all the documents provided. When PV modules are exposed to light, they supply voltage to the inverter. This document does not describe all possible system configurations.
Warning Signs Explanation
⚠️ General warning sign
⚡ Electricity hazard
Switching OFF
Diagram shows a rotary switch being turned from the 'ON' position to the 'OFF' position.
Mounting
Diagram illustrates the process of mounting the Fronius Backup Switch onto a DIN rail.
Positioning
Diagram depicts a typical photovoltaic (PV) system layout, showing the connection of PV modules, inverter, battery, and the backup switch within a hybrid system.
Power Wiring
| Conductor per terminal | Terminal 1 | Terminal 2 |
|---|---|---|
| CU wire | 1 - 25 mm² | ≤10 mm² |
| CU wire (ferrule) | 4 - 16 mm² | ≤10 mm² |
| Ferrule | 2.5 - 16 mm² | ≤10 mm² |
| Torque | 3 Nm (2.2 ft-lb) | |
Diagram shows the connection points for power wiring, indicating terminal sizes and torque specifications.
Option: 1P Separation
Diagram illustrates the wiring configuration for single-phase (1P) separation.
Option: 3P Separation
Diagrams illustrate the wiring configurations for three-phase (3P) separation, showing connections for L1, L2, L3, and their respective terminals.
Data Wiring
| Conductor per terminal | Terminal 1 | Terminal 2 |
|---|---|---|
| CU wire | 0.13 - 10 mm² | 0.13 - 2.5 mm² |
| CU wire (ferrule) | 0.5 - 6 mm² | 0.13 - 2.5 mm² |
| Ferrule | 0.5 - 6 mm² | 0.13 - 2.5 mm² |
| Torque | 0.8 - 1.7 Nm | |
Diagram shows the connection points for data wiring, indicating terminal sizes and torque specifications.
Option: Modbus RTU
Table lists Smart Meter models and their pin assignments for connection to the inverter via the backup switch.
| Smart Meter | Pin | Inverter Connection |
|---|---|---|
| IP | M-, GND, M+ | M+, WSD IN-, IN7, IN6, V+, WSD IN+, GND, M- |
| 50kA-3 | B, C, A | M+, WSD IN-, IN7, IN6, V+, WSD IN+, GND, M- |
| 63A-1 | 34, 35, 33 | M+, WSD IN-, IN7, IN6, V+, WSD IN+, GND, M- |
| 63A-3 | B, C, A | M+, WSD IN-, IN7, IN6, V+, WSD IN+, GND, M- |
| TS 5kA-3 | 12, 13, 11 | M+, WSD IN-, IN7, IN6, V+, WSD IN+, GND, M- |
| TS 65A-3 | 9, 10, 8 | M+, WSD IN-, IN7, IN6, V+, WSD IN+, GND, M- |
| TS 100A-1 | 5, 6, 4 | M+, WSD IN-, IN7, IN6, V+, WSD IN+, GND, M- |
Wiring diagram shows connections between the Smart Meter and the Inverter, routed through the backup switch, with specific terminal labels (23, 24, 13, 14) and conductor colors (green, blue, brown, dashed green).
Option: Modbus TCP/IP | MQTT
Wiring diagram illustrates connections for Modbus TCP/IP or MQTT communication, showing the Smart Meter IP, Grid, and Inverter connections.
Mounting the Protective Cover
Diagrams show the installation of a protective cover using screws, specifying screw size and torque values (e.g., 2.2 x 6.5 mm, 0.2 Nm).
Commissioning
Diagram shows the rotary switch being turned to the 'ON' position for commissioning.
User Interface Configuration
Configuration involves the following steps:
- Open the user interface of the inverter.
- Navigate to Device Configuration > Functions and I/Os.
- Activate Backup Power.
- Select Full Backup under Backup Power Mode.
Testing the Backup Power Function
Diagrams illustrate the switch positions for testing: 'Grid supply', 'OFF', and 'Backup power supply'.
Checklist - Backup Power
For a checklist and further resources, scan the QR code or visit:
https://www.fronius.com/en-us/usa/solar-energy/downloads
Search for: "42,0426,0365"
A QR code is provided, linking to Fronius downloads for solar energy products.
Contact and Resources
Fronius International GmbH
Froniusstraße 1
4643 Pettenbach
Austria
Email: contact@fronius.com
Website: www.fronius.com
For addresses of Fronius Sales & Service Partners and locations, visit www.fronius.com/contact.
Detailed, country-specific warranty terms are available on: www.fronius.com/solar/warranty
Information about monitoring and digital tools is available at: www.fronius.com/en/solar-energy/installers-partners/products-solutions/monitoring-digital-tools
Fronius International
