ABB System pro E power Top Busbar System

Compact, Reliable, High-voltage Switchboard

System pro E power is the innovative ABB's main distribution switchboard solution with rated current up to 6300A and short-circuit current up to 120kA. Designed to easily fulfill all electrical installation requirements in terms of protection degree, segregation form and electrical characteristics, according to latest international standards and in perfect synergy with all ABB's low voltage equipment.

The new TBBS (Top Busbar System) configuration introduces a switchboard certified at 800V AC, which offers a compact footprint and space-saving design. The configuration ensures full compliance with IEC 61439-2 standards, and it is compliant to Enel standards, further highlighting its reliability and adherence to industry requirements.

This new switchboard configuration is specifically designed to cater to low voltage power collection requirements in utility-scale and large photovoltaic plants utilizing a high-power string inverter architecture operating at 800V AC. In the renewable energy sector, there has been an increasing trend of raising voltages to improve power density and reduce balance of system costs. This innovative design allows for installation on skids and in compact substations, among other applications.

Reliable in Extreme Conditions

Thanks to the tests performed on the product, the enclosures can stand a rated short-time withstand current (lcw) up to 120 kA and a Maximum rated current up to 6300A. The solution is also provided of an ant seismic certification, thanks to a shock level test up to 0.75 g performed with the installation of specific accessories. The safety is also guaranteed by the complete range of segregation forms up to 4b and by the blind tops arc fault resistant (composed by two flaps that, in case of internal arc fault, allow its outburst upward, protecting an operator that could be present in front of the switchboard).

Speed up Projects 

It is possible to save valuable time (up to 5% of the total time) by choosing the incoming column with DOC software, where a list of preconfigured incomer columns is already uploaded. Additional time can be saved thanks to the breaker kit package that with one single code provides all the components for a breaker kit installation (panel, plate, supports and screws); the pre-assembled DIN rail kit allows to save up to 70% on the time in case of System pro M components installation.

Space Saving

A wide variety of dimensions are available to meet all customer requests: 2 heights, 5 depths and 6 widths. Furthermore, amperage from 2500A to 6300A can be reached in the minimum widths listed below: Up to 2500A (3P) installable in W=400mm. Up to 4000A (3P) installable in W=600mm. Up to 4000A (4P) installable in W=800mm. Up to 6300A (4P) installable in W=1000/1250mm. For example, further space (up to 38%) can be saved by mounting two air circuit breakers in one column. In 2500A, width 400mm (E2.2 F/W 3P), thanks to the dedicated components.

Dedicated Solution: 800V Configuration - General Information

The configuration comprises of two columns and contains three main section types:

• Breaker Section: This section incorporates the recently launched Emax 2 E4.2S/E10 (4000A), a breaker certified for Annex H according to IEC 60947-2. It is also possible to mount the Emax 2 E4.2S/E9 when annex H in IT systems is not required.

The breaker needs to be three poles and fixed, with rear vertical terminals (4000A N/S/H/V upper terminals for busduct connection and 4000A N/S/H/V LVR ones for InLine II connections)

• Inverter Protection Sections: This section relies on up to 9 InLine II fuse switches per column with an AC-22B utilization category at 800V. The InLine II installable models are ZLBM1/2/3 with 3 poles (integrated V-Clamp; double V-Clamp/ bolt connection M12 and double cable lug kit M12 versions). These fuse switches offer the option to integrate a fuse blown monitoring indicator (EFM). They also provide various connection possibilities, enabling the installation of all available inverter models.

• Auxiliary Section: This compartment typically houses the auxiliary main fuse switch, isolation monitor, voltage transformer, surge protection devices, and all the auxiliary components required for signal collection, remote monitoring, grid interface protection, and other functionalities.

Key Characteristics of the Configuration

Compliance with standard: IEC 61439-1-2 Enel tenders compliance Type of installation: Indoor, front access Rated service voltage UE: 800V AC Rated insulation voltage Ui: up to 1000V AC - 1500V DC Rated frequency: 50-60Hz Rated impulse withstand voltage Uimp: 12kV (8kV for InLine) Rated current In: up 3622A Rated short-time withstand current lcw: up to 50kA (1s) Rated peak short-circuit current lpk: up to 105kA

IP protection class: IP30 RAL: 7035 orange peel Form of segregation: Breaker section - 4b Inverter protection section - 3b Auxiliary section - 2a Functional dimensions: Height - 1800 mm Width - 2000 mm (1000 mm per each column) Depth - 700 mm External dimensions: Height - 2114 mm Width - 2216 mm Depth - 817 mm

Electrical Fuse Monitoring functionality (EFM)

This functionality monitors operational status and, in the event of a blown fuse, raises an alert. It allows easy location of faults, enhancing safety, serviceability and minimizing downtime. When required, the electronic fuse monitoring unit is integrated in InLine II.

Power-Flo Technologies is proud to partner with ABB and their System pro E power with the innovative TBBS 800V configuration that sets a new benchmark for reliability, efficiency, and adaptability in modern electrical distribution. By combining compact design with compliance to international and Enel standards, it ensures optimal performance in demanding applications such as utility-scale photovoltaic plants and compact substations. With its proven resilience under extreme conditions, space-saving architecture, and time-saving installation features, this solution delivers exceptional value to engineers and operators alike. The integration of advanced monitoring functions further enhances safety and serviceability, reducing downtime and improving overall system management. In every detail, ABB demonstrates its commitment to supporting the energy transition with cutting-edge technology built for the future.