Q3 SurgeBox TN-S Compact – kompakte Überspannungsschutzbox für TN-S-Netze

Surge Protection Box TN-S: Q3 SurgeBox TN-S Compact

Compact surge protection box TN-S networks, designed for stub-line connection in building supply, equipotential bonding, PV AC connection and building technology.

Q3 SurgeBox TN-S Compact – compact surge protection box for TN-S networks

The Q3 SurgeBox TN-S Compact is a ready-to-connect surge protection box for TN-S networks. It is used for AC-side protection in building supply, building technology, PV systems, wallboxes, heat pumps and distribution boards.

The box combines an SPD Type 1+2+3 combined arrester with an integrated fuse/disconnector unit, plug-in protection modules, optical status indication and a prepared remote signalling contact. This makes it suitable for projects where surge protection needs to be compact, clearly structured and ready to connect in a separate enclosure.

AC connection boxes for PV projects with protection, switching and distribution functions.

Modern building installations include an increasing number of electrical and electronic systems. PV inverters, charging infrastructure, heat pumps, control units and building technology all increase the need for a well-structured AC-side protection concept.

The Q3 Surge Protection Box TN-S Compact is intended for applications where surge protection is required, but a full AC connection box with busbars, switch-disconnectors or extensive distribution functions is not necessary. It can be used, for example, close to the building supply, at distribution boards or for AC-side PV and energy applications.

Q3 SurgeBox TN-S Compact Surge Protection Box TN-S SPD Type 1+2+3 TN-S

Lightning and surge protection on the AC side

The Q3 Surge Protection Box TN-S Compact is designed for internal lightning and surge protection on the AC side. It limits transient overvoltages and discharges lightning partial currents in TN-S networks towards the equipotential bonding system. This helps protect downstream building technology, PV inverters, wallboxes, heat pumps and distribution boards.

The technical classification is important: the SurgeBox does not replace an external lightning protection system for the building. It is a compact surge protection box for the electrical installation, used where an SPD Type 1+2+3 combined arrester needs to be installed in a ready-to-connect and clearly structured separate enclosure.

Q3 SurgeBox TN-S Compact at a glance

Application	AC-side surge protection box in TN-S networks for building, PV and building supply technology
Function	Discharge and limitation of transient overvoltages in TN-S networks
Network form	TN-S
Protection concept	Internal lightning and surge protection, AC side
Nominal voltage	230/400 V AC
Surge protection	Combined arrester Type 1+2+3
Lightning impulse current	12.5 kA per pole
Max. discharge current Imax	50 kA per pole
Voltage protection level Up	≤ 1,5 kV
Enclosure	Polycarbonate enclosure with transparent cover
Connection	Suitable for NYY-J 5×35
Equipment	Plug-in protection modules, optical status indication, prepared remote signalling contact
Area of application	Indoor / protected outdoor area
Applicable standards	DIN EN 61643-11 / IEC 61643-11 for surge protective devices

SPD Type 1+2+3 for lightning and surge protection in TN-S networks

Inside the Q3 Surge Protection Box TN-S Compact, a Type 1+2+3 combined arrester is installed. The surge protection is designed to discharge lightning partial currents and limit transient overvoltages on the AC side before they can damage downstream equipment.

The integrated fuse/disconnector unit provides a compact and clearly structured arrester branch. Plug-in protection modules, optical status indication and a prepared remote signalling contact support maintenance, inspection and integration into higher-level monitoring concepts.

For building services contractors, MEP contractors, large-scale electrical installers and specialist project electricians

The Q3 Surge Protection Box TN-S Compact is designed for specialist partners who plan and install AC protection technology for larger building projects, residential quarters, commercial buildings or technical infrastructure. This includes TGA contractors, large-scale electrical installers, specialised electrical contractors and project electricians.

Especially in projects with PV systems, charging infrastructure, heat pumps or extensive building technology, a clear, documented and installation-friendly solution is important. The SurgeBox is planned, built and electrically tested by Q3 ENERGIE – with a defined bill of materials, traceable wiring and the option of project-specific adaptation.

Standard configuration with project-specific adaptation

The Q3 Surge Protection Box TN-S Compact is built as a compact standard configuration. At the same time, project- and application-specific variants can be implemented where the connection concept, enclosure design, installation location or additional requirements make this necessary.

This makes the box suitable both for recurring standard applications and for projects where building services, electrical installation and energy technology need to be precisely coordinated. Q3 ENERGIE supports the technical assessment and manufactures the suitable configuration for the specific application.

Technical key data of the Q3 Surge Protection Box TN-S Compact

The standard configuration of the Q3 SurgeBox TN-S Compact is intended for TN-S networks with 230/400 V AC. The unit is built in a polycarbonate enclosure with transparent cover, external mounting lugs, integrated strain relief and cable entries for AC-side connection.

Key technical features include the combined arrester Type 1+2+3, Iimp 12.5 kA per pole, plug-in protection modules, optical status indication and a remote signalling contact for optional use. The data sheet also specifies indoor / protected outdoor installation and the prepared connection for NYY-J 5×35.

Difference from a classic AC connection box

The Q3 Surge Protection Box TN-S Compact is not a large AC connection box for bundling high AC currents or feeding in several inverters. For these applications, Q3 ENERGIE continues to offer project-specific AC connection boxes with protection, switching and distribution functions.

The SurgeBox complements this product range as a compact AC protection box. It is the right solution when the focus is on surge protection, TN-S connection and ready-to-install design – not on busbars, NH fuse switch-disconnectors or a complete feed-in distribution board.

What is the Q3 SurgeBox TN-S Compact?

The Q3 SurgeBox TN-S Compact is a ready-to-connect AC surge protection box for TN-S networks. It is intended for applications in building supply, building technology, PV AC connection, wallboxes, heat pumps and distribution boards.

Is the SurgeBox an AC connection box?

The surge protection box TN-S is a compact AC protection box, but not a classic AC connection box for feed-in or distribution of high AC currents. It complements AC connection technology with a separate solution for surge protection in TN-S networks.

Which network form is the SurgeBox designed for?

The standard configuration is designed for TN-S networks with 230/400 V AC. Deviating network forms or installation locations should be checked on a project-specific basis.

Where is the surge protection box used?

Typical application areas include building supply areas, distribution boards, equipotential bonding / main earthing bar, AC-side PV connection, wallboxes, heat pumps and technical building equipment.

Is the Q3 SurgeBox a lightning protection system?

The Q3 surge protection box TN-S Compact is a surge protection box for internal lightning and surge protection on the AC side. It is not an external lightning protection system for the building envelope, but a ready-to-connect SPD solution for TN-S networks.

Is the SurgeBox suitable for TT networks?

The standard configuration of the Q3 surge protection box TN-S Compact is designed for TN-S networks with 230/400 V AC. Other network forms, such as TT or TN-C-S, must be checked and designed on a project-specific basis.

What does SPD Type 1+2+3 mean?

SPD Type 1+2+3 refers to a combined arrester that can discharge lightning partial currents and limit transient overvoltages on the AC side. In the Q3 SurgeBox, this surge protection is compactly installed in a separate enclosure.

Request the Q3 Surge Protection Box TN-S Compact

You are planning a building project, PV system, charging infrastructure or building services application with AC-side surge protection? Send us your requirements and we will check whether the standard Q3 SurgeBox TN-S Compact is suitable or whether a project-specific configuration is required.

Download Q3 SurgeBox data sheet →