Fronius Backup Switch 1P/3P-63A Operating instructions

1. Safety Instructions

1. Safety Instructions
2. Safety rules

1. Safety Instructions
2. Safety rules

• serious or fatal injury to the operator or a third party,
• and damage to the device and other material assets belonging to the operating company.

• be suitably qualified,
• have knowledge of and experience in dealing with electrical installations and
• have fully read and precisely followed these Operating Instructions.

The Operating Instructions must always be kept on hand wherever the device is being used. In addition to the Operating Instructions, all applicable local rules and regulations regarding accident prevention and environmental protection must also be followed.

• must be kept in a legible state
• must not be damaged/marked
• must not be removed
• must not be covered, pasted, or painted over.

The terminals can reach high temperatures.

• serious or fatal injury to the operator or a third party,
• and damage to the device and other material assets belonging to the operating company.

Any safety devices that are not functioning properly must be repaired by an authorized specialist before the device is switched on.

Never bypass or disable protection devices.

For the location of the safety and danger notices on the device, refer to the section headed “General” in the Operating Instructions for the device.

Any equipment malfunctions which might impair safety must be remedied immediately before the device is turned on.

Your personal safety is at stake!

1. Safety Instructions
2. Safety rules

Operation or storage of the device outside the stipulated area will be deemed as not in accordance with the intended purpose. The manufacturer accepts no liability for any damage resulting from improper use.

1. Safety Instructions
2. Safety rules

The servicing information contained in these Operating Instructions is intended only for the use of qualified service engineers. An electric shock can be fatal. Do not carry out any actions other than those described in the documentation. This also applies to qualified personnel.

All cables and leads must be secured, undamaged, insulated, and adequately dimensioned. Loose connections, scorched, damaged, or under-dimensioned cables and leads must be repaired immediately by an authorized specialist.

Maintenance and repair work must only be carried out by an authorized specialist.

It is impossible to guarantee that externally (aka, third-party) procured parts are designed and manufactured to meet the demands made on them, or that they satisfy safety requirements. Use only original spare parts (also applies to standard parts).

Do not carry out any alterations, installations, or modifications to the device without first obtaining the manufacturer's permission.

Components that are not in perfect condition must be changed immediately.

1. Safety Instructions
2. Safety rules

Copyright of these operating instructions remains with the manufacturer.

Text and illustrations were accurate at the time of printing, subject to change.
We are grateful for suggestions for improvement and information on any discrepancies in the operating instructions.

The Fronius Backup Switch is a piece of stationary equipment that was developed for use in public power grids with TN/TT systems. In the event of a grid failure, all connected loads and producers can be manually disconnected from the public grid in accordance with the specifications of the grid operator. The Fronius Backup Switch enables manual switching to the backup power supply. As soon as the public grid is stable again, the Fronius Backup Switch can be used to switch manually back to the power supply from the public grid. The Fronius Backup Switch can only be used in systems equipped with a battery storage system.

1. General information

The Fronius Backup Switch is a piece of stationary equipment that was developed for use in public power grids with TN/TT systems. In the event of a grid failure, all connected loads and producers can be manually disconnected from the public grid in accordance with the specifications of the grid operator. The Fronius Backup Switch enables manual switching to the backup power supply. As soon as the public grid is stable again, the Fronius Backup Switch can be used to switch manually back to the power supply from the public grid. The Fronius Backup Switch can only be used in systems equipped with a battery storage system.

1. General information
2. General information

The Fronius Backup Switch is a piece of stationary equipment that was developed for use in public power grids with TN/TT systems. In the event of a grid failure, all connected loads and producers can be manually disconnected from the public grid in accordance with the specifications of the grid operator. The Fronius Backup Switch enables manual switching to the backup power supply. As soon as the public grid is stable again, the Fronius Backup Switch can be used to switch manually back to the power supply from the public grid. The Fronius Backup Switch can only be used in systems equipped with a battery storage system.

1. General information
2. General information

The Fronius Backup Switch is not suitable for the backup power supply of life-sustaining medical devices.

1. General information
2. General information

Technical data and markings are provided on the Fronius Backup Switch. They must not be removed or painted over.

Markings
	CE label – confirms compliance with applicable EU directives and regulations.
	C UL US LISTED marking – confirms compliance with applicable standards for Canada and the USA.

IMPORTANT!
NO power categories of the US versions of the Fronius product series "Primo GEN24 X.X 208-240 (Plus) (SC)" are compatible with the Fronius Backup Switch.

1. General information
2. General information

(1)	1 pc Fronius Backup Switch
(2)	2 pcs protective cover incl. 4 pcs screws B2.2 x 6.5 mm (not shown)
(3)	1 pc Quick Start Guide
(4)	1 pc "backup power supply" sticker

1. General information
2. General information

	PV module generates direct current
	Fronius GEN24 inverter converts direct current into alternating current and charges the battery (battery charging is only possible with Fronius GEN24 Plus inverters). The integrated system monitoring enables the inverter to be integrated into a network by means of WLAN.
	Fronius Backup Switch In the event of a power failure or grid malfunction, this enables all connected loads and producers to be disconnected from the public grid manually and safely in accordance with the specifications of the grid operator. Once grid stability has been restored, manual reconnection to the public grid is possible.
	Inverter in the system e.g. Fronius Primo, Fronius Symo, etc.
	Primary meter (Fronius Smart Meter) records the load curve of the system and makes the measured data available for energy profiling in Fronius Solar.web. The primary meter also regulates the dynamic feed-in control.
	Utility meter measures the metering data relevant for the billing of electricity quantities (primarily the kilowatt hours of grid purchases and grid power feed). On the basis of the data relevant for billing, the electricity retailer invoices a grid purchase and the purchaser of the surplus pays for the grid power feed.
	Grid supplies the loads in the system if insufficient power is being generated by the PV modules or supplied by the battery.
	Battery is coupled to the inverter on the direct current side, and stores electrical energy.
	Loads in the system e.g. washing machine, lights, television, etc.

1. General information
2. General information

The Fronius Backup Switch must be installed at the following position in the system.

1. General information
2. General information

• Fronius Primo GEN24 Plus
• Fronius Symo GEN24 Plus

IMPORTANT!
NO power categories of the US versions of the Fronius product series "Primo GEN24 X.X 208-240 (Plus) (SC)" are compatible with the Fronius Backup Switch.

• Fronius Smart Meter IP
• Fronius Smart Meter 50kA-3
• Fronius Smart Meter 63A-1
• Fronius Smart Meter 63A-3
• Fronius Smart Meter TS 5kA-3
• Fronius Smart Meter TS 65A-3
• Fronius Smart Meter TS 100A-1

Details on how to connect a Fronius Smart Meter can be found in the respective operating instructions.
To download the Smart Meter operating instructions, either click on the link Smart Meter operating instructions or visit the page fronius.com/en/solar-energy/installers-partners/downloads on an end device and enter the search term "Smart Meter".

1. General information

The backup switch has three switch positions:

(1)	Grid operation The power is supplied by the public grid.
(2)	0-position (de-energized) The power supply is safely disconnected from the public grid or from the backup power supply.
(3)	Backup power mode The power is supplied as backup power via the inverter or the battery.

IMPORTANT!
In the switch position (2) the Backup Switch can be secured to prevent it from being switched on/off using a standard padlock. The national guidelines must be complied with in this respect.

1. General information
2. Operating controls and connections

The backup switch has three switch positions:

(1)	Grid operation The power is supplied by the public grid.
(2)	0-position (de-energized) The power supply is safely disconnected from the public grid or from the backup power supply.
(3)	Backup power mode The power is supplied as backup power via the inverter or the battery.

IMPORTANT!
In the switch position (2) the Backup Switch can be secured to prevent it from being switched on/off using a standard padlock. The national guidelines must be complied with in this respect.

1. General information
2. Operating controls and connections

(1)	Auxiliary contact switch terminals: Data communication
(2)	Load disconnector 63 A terminals: Grid
(3)	Load disconnector 20 A terminals: Data communication
(4)	Auxiliary contact switch terminals: Data communication
(5)	Load disconnector 63 A terminals: Load
(6)	Load disconnector 20 A terminals: Data communication

For information about installing data communication, see chapter Connecting the data communication cables on page (→).

• Upstream overcurrent protection according to the information in the chapter Technical data on page (→).
• A surge protection device (SPD) as specified in chapter Technical data on page (→).

1. Installation and Startup

• Upstream overcurrent protection according to the information in the chapter Technical data on page (→).
• A surge protection device (SPD) as specified in chapter Technical data on page (→).

1. Installation and Startup
2. Requirements for connecting the Backup Switch

• Upstream overcurrent protection according to the information in the chapter Technical data on page (→).
• A surge protection device (SPD) as specified in chapter Technical data on page (→).

1. Installation and Startup
2. Requirements for connecting the Backup Switch

Solid	Fine-stranded	Fine-stranded with ferrule and collar	Fine-stranded with ferrule without collar

1. Installation and Startup
2. Requirements for connecting the Backup Switch

Connect only round copper wires to the terminals. See tables below:

Terminals on load disconnector 63 A 1)
1 - 25 mm2	4 - 16 mm2	2.5 - 16 mm2	2.5 - 16 mm2
max. 2 x 10 mm2	max. 2 x 10 mm2

Terminals on load disconnector 20 A 1)
0.13 - 10 mm2	0.5 - 6 mm2	0.5 - 6 mm2	0.5 - 6 mm2

Terminals on auxiliary contact switch
0.13 - 2.5 mm2	0.75 - 2.5 mm2	0.5 - 1.5 mm2	0.5 - 1.5 mm2

¹⁾ Select the cross-section of the sufficiently large cable. The cable cross-section depends on the power actually connected.

1. Installation and Startup
2. Requirements for connecting the Backup Switch

1. Installation and Startup

1. Installation and Startup
2. Preparing for the installation

1. Installation and Startup
2. Preparing for the installation

1

Turn off the automatic circuit breaker. Set the DC disconnector to the "off" (OFF) switch position.

2

Switch off the battery connected to the inverter.

Wait for the capacitors of the inverter to discharge (2 minutes).

1. Installation and Startup
2. Preparing for the installation

The Fronius Backup Switch can be mounted on a 35 mm DIN rail.

Housing dimensions according to DIN 4388:

• 7.2 TE (horizontal pitch) with left and right end tabs (corresponds to the delivery condition)
• 6.1 TE without end tabs

1. Installation and Startup
2. Preparing for the installation

Before connecting the cables, the housing cover must be removed.

1Set the switch to position "0".

2Push the switch lock down.

✓The switch is now unlocked.

3Remove the screw.

✓The switch and housing cover can now be removed.

1. Installation and Startup
2. Preparing for the installation

1. Installation and Startup

1Before starting the connection work, strip all cables of their insulation in accordance with the specifications. See chapter Stripping lengths on page (→).

2

Plug the single conductor (L1 ) coming from the grid into the terminal.

3

Tighten the single conductor (L1 ) in the terminal. For permissible connection screws and torques, see Permitted connection screws on page (→).

1. Installation and Startup
2. 1-pin installation

1Before starting the connection work, strip all cables of their insulation in accordance with the specifications. See chapter Stripping lengths on page (→).

2

Plug the single conductor (L1 ) coming from the grid into the terminal.

3

Tighten the single conductor (L1 ) in the terminal. For permissible connection screws and torques, see Permitted connection screws on page (→).

1. Installation and Startup
2. 1-pin installation

1Before starting the connection work, strip all cables of their insulation in accordance with the specifications. See chapter Stripping lengths on page (→).

2

Plug the single conductor (L1‘) coming from the backup power circuit into the terminal.

3

Tighten the single conductor (L1‘) in the terminal. For permissible connection screws and torques, see Permitted connection screws on page (→).

1. Installation and Startup

1Before starting the connection work, strip all cables of their insulation in accordance with the specifications. See chapter Stripping lengths on page (→).

2

Plug the single conductors (L1 , L2 , L3 ) coming from the grid into the terminal.

3

Tighten the single conductors (L1 , L2 , L3 ) in the terminals. For permissible connection screws and torques, see Permitted connection screws on page (→).

1. Installation and Startup
2. 3-pin installation

1Before starting the connection work, strip all cables of their insulation in accordance with the specifications. See chapter Stripping lengths on page (→).

2

Plug the single conductors (L1 , L2 , L3 ) coming from the grid into the terminal.

3

Tighten the single conductors (L1 , L2 , L3 ) in the terminals. For permissible connection screws and torques, see Permitted connection screws on page (→).

1. Installation and Startup
2. 3-pin installation

1Before starting the connection work, strip all cables of their insulation in accordance with the specifications. See chapter Stripping lengths on page (→).

2

Plug the singles conductor (L1‘, L2‘, L3‘) coming from the backup power circuit into the terminals.

3

Tighten the single conductors (L1‘, L2‘, L3‘) in the terminals. For permissible connection screws and torques, see Permitted connection screws on page (→).

1. Installation and Startup

• Use network cables of type CAT5 STP or higher.
• Use a twisted cable pair for corresponding data cables.
• Use double insulated or sheathed data cables when near bare conductors.
• Use shielded twisted pair cables to avoid interference.

¹⁾ Wire the Fronius Smart Meter IP via Modbus so that the signal can be interrupted. The Fronius Smart Meter IP must not be connected to the network.

1. Installation and Startup
2. Connecting the data communication cables

• Use network cables of type CAT5 STP or higher.
• Use a twisted cable pair for corresponding data cables.
• Use double insulated or sheathed data cables when near bare conductors.
• Use shielded twisted pair cables to avoid interference.

¹⁾ Wire the Fronius Smart Meter IP via Modbus so that the signal can be interrupted. The Fronius Smart Meter IP must not be connected to the network.

1. Installation and Startup
2. Connecting the data communication cables

Feedback switch in backup power position (IN6/IN7)
When the Backup Switch is switched to backup power supply, the inverter checks the position of the switch. If this position is correct, the backup power supply of the connected loads in the backup power circuit is enabled.

Communication Modbus Smart Meter (M+/M-)
The communication between the inverter and the Fronius Smart Meter is interrupted via the contact. The interrupted communication prevents automatic termination of backup power mode. The inverter remains in backup power mode. If a stable power supply from the grid is available again, the switch of the Fronius Backup Switch must be switched to grid operation manually.

Wired Shut Down (WSD IN/WSD OUT)
In the "O" switch position, the WSD line is interrupted. The inverter switches off immediately. An asynchronous switchback to the grid is prevented.

1. Installation and Startup

IMPORTANT!
The protective covers are used for additional insulation of the live lines to the data transfer lines.

1

Mount a top protective cover on the load disconnector 63 A. Fit using the screws supplied with the delivery.

2

Mount a bottom protective cover on the load disconnector 63 A. Fit using the screws supplied with the delivery.

1. Installation and Startup
2. Mounting the protective cover

IMPORTANT!
The protective covers are used for additional insulation of the live lines to the data transfer lines.

1

Mount a top protective cover on the load disconnector 63 A. Fit using the screws supplied with the delivery.

2

Mount a bottom protective cover on the load disconnector 63 A. Fit using the screws supplied with the delivery.

1. Installation and Startup

1

Reinstall the housing cover and the switch and secure with the screw.

1. Installation and Startup
2. Mounting housing cover and switch

1

Reinstall the housing cover and the switch and secure with the screw.

1. Installation and Startup

1

Switch on the battery connected to the inverter.

2

Set the DC disconnector to the "on" switch position. Turn on the automatic circuit breaker.

1. Installation and Startup
2. Commissioning

1

Switch on the battery connected to the inverter.

2

Set the DC disconnector to the "on" switch position. Turn on the automatic circuit breaker.

1. Installation and Startup
2. Commissioning

IMPORTANT!
Settings in the "Device configuration" → "Functions and I/Os" menu item may only be implemented by staff trained to do so! The service password must be entered for the "Device configuration" menu item.

1. Installation and Startup
2. Commissioning

The Full Backup power mode has been configured.

1. Installation and Startup
2. Commissioning

• During the initial installation and configuration
• After working on the switch cabinet
• During ongoing operation (recommendation: at least once a year)

For test mode, a battery charge of min. 30% is recommended.

A description on how to run test mode can be found in the backup power checklist (https://www.fronius.com/en/search-page, item number: 42,0426,0365).

¹⁾ According to IEC 947-3, IEC 947-5-1, VDE 0660, EN 60947-3, EN 60947-5-1

²⁾ Applies to: Grids with grounded neutral point, overvoltage category I to III, pollution degree 3: Uimp = 6kV.

1. Appendix

¹⁾ According to IEC 947-3, IEC 947-5-1, VDE 0660, EN 60947-3, EN 60947-5-1

²⁾ Applies to: Grids with grounded neutral point, overvoltage category I to III, pollution degree 3: Uimp = 6kV.

1. Appendix
2. Technical data

¹⁾ According to IEC 947-3, IEC 947-5-1, VDE 0660, EN 60947-3, EN 60947-5-1

²⁾ Applies to: Grids with grounded neutral point, overvoltage category I to III, pollution degree 3: Uimp = 6kV.

1. Appendix

Maintenance and service work may only be carried out by Fronius-trained service technicians.

1. Appendix
2. Service, warranty terms and conditions, and disposal

Maintenance and service work may only be carried out by Fronius-trained service technicians.

1. Appendix
2. Service, warranty terms and conditions, and disposal

Waste electrical and electronic equipment must be collected separately and recycled in an environmentally sound manner in accordance with the European Directive and national law. Used equipment must be returned to the distributor or through a local authorized collection and disposal system. Proper disposal of the used device promotes sustainable recycling of resources and prevents negative effects on health and the environment.

• Collect separately
• Observe local regulations
• Crush cardboard boxes

1. Appendix
2. Service, warranty terms and conditions, and disposal

Detailed, country-specific warranty conditions are available at www.fronius.com/solar/warranty.

To obtain the full warranty period for your newly installed Fronius product, please register at www.solarweb.com.

1. Circuit Diagrams

1. Circuit Diagrams
2. Manual switch to backup power 1-pin separation, e.g., Australia

1. Circuit Diagrams

1. Circuit Diagrams
2. Manual switch to backup power 3-pin separation, e.g., Austria