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Low Voltage Switchgear
Safe and flexible power distribution

In industrial plants, buildings, and infrastructure, even a small disturbance in the power supply can cause serious damage – not only to industrial and building operations but also to people. That is why the standards for safe power distribution are so high.

In addition, today’s increasingly automated and digitized production processes and buildings require increasingly adaptable power distribution. They need a flexible layout, high availability, and personal and plant safety.


Conforming to standards: systematic power distribution

Our products and systems support the safe, flexible, and efficient implementation of power distribution planning, design, and operation. The SIVACON S8 low-voltage power distribution boards and SENTRON components are triedand- true and perfectly compatible.

This not only helps to significantly reduce investment costs and risks: It also increases plant availability throughout the entire period of use.

Conforming to standards: IEC 61439

As of 2014, all low-voltage switchgear and control gear assemblies in the European Economic Area must conform to the IEC 61439 standard. This standard describes distinct areas of responsibility. Specifically, it divides the tasks between an “original manufacturer“ and a “manufacturer of a switchgear and control gear assembly“. The original manufacturer (such as Siemens) is the company responsible for the original design and the associated verification of the switchgear and control gear assembly in accordance with the relevant standard.

With a SIVACON S8 low-voltage power distribution board, customers are always
on the safe side: It is design-verified according to the IEC 61439-1/-2 standard.
In addition, it disposes of the shipping approvals according to LR, DNV-GL and ABS.


for maximum demands

Your benefit

  • Emphasis on maximum personal and plant safety

  • Flexible layout thanks to a modular concept and wide variety of parts

  • Efficient implementa- tion of technologically sophisticated solutions

Safe down to the last detail

The SIVACON S8 low-voltage power distribu- tion board ensures a high level of personal and plant safety. Continuous testing to
IEC 61641 and VDE 0660 Part 500-2 guaran- tees safety in the event of an arcing fault. Many well-thought-out details, including a reduced use of plastic parts and insulated main busbars, guarantee maximum safety and plant availability, resulting in low liabil- ity risk.

Flexible and adaptable

Thanks to its modular concept and wide variety of components, the SIVACON S8 low- voltage power distribution board can meet all individual requirements. For instance, the profile bar or flat copper design of the vertical section busbars allows for tap-offs in the smallest of grids. The switching device holders are also modular, with a graduated depth.

Efficient throughout the entire process

Over 320,000 switching boards have already been launched on the market by SIVACON Technology Partners – proof that technol- ogically sophisticated solutions can be effi- ciently implemented with the SIVACON S8 low-voltage power distribution board. Power distribution is easy to plan, and the distribu- tion board can be quickly configured using the SIMARIS software tools. The result: time savings and planning reliability throughout the entire process.

SIVACON S8 - system overview

Circuit-breaker design
Universal mounting design
Fixed-mounted design
In-line design, plug-in
In-line design, fixed-mounted
Reactive power compensation
Busbar position
Top, rear
Top, rear
Top, rear
Top, rear
Without, top, rear
Internal separation
Form 1, 2b, 3a, 4b, 4 type 7 (BS)
Form 3b, 4a, 4b, 4 type 7 (BS)
Form 1, 2b, 3b, 4a, 4b
Form 3b, 4b
Form 1, 2b
Form 1, 2b
Cubicle width (mm)
400, 600, 800, 1000, 1400
600, 1000, 1200
1000, 1200
1000, 1200
600, 800, 1000
Type of connection
Front or rear
Front or rear
Rated values
Up to 6,300 A
Up to 630 A Up to 250 kW
Up to 630 A
Up to 630 A
Up to 630 A
Unchoked up to 600 kvar Choked up to 500 kvar
Incoming feeder Outgoing feeder Bus coupler
Cable feeders Motor feeders (MCC)
Cable feeders
Cable feeders
Cable feeders
Central compensation of reactive power
Mounting design
Fixed-mounted design Withdrawable design
Withdrawable design Fixed-mounted design with compartment doors Plug-in design
Fixed-mounted design with front covers
Plug-in design
Fixed-mounted design
Fixed-mounted design

SIVACON S8 – simple integration of SENTRON protection, switching, measuring and monitoring devices for low-voltage power distribution

3WA air circuit breakers
3VA molded case circuit breakers
3NJ4 fuse switch disconnectors
3NP1 fuse switch disconnectors
3NJ6 switch disconnectors with fuses
Communication capability
Early fault detection thanks to connection to higher-level control systems.
Supports all common communication options: transparency of switching states and energy flows.
Special features
Numerous sizes permit flexible use. Fixed-mounted and withdrawable designs for fast and easy maintenance. Comprehensive accessories
High breaking capacity with compact design. Superior selectivity properties. Comprehensive accessories for flexible function expansions
Fast fuse tripping characteristic to prevent damage to plants and machines. Wide range of connection options.
Compact design requires very little space. Fast, safe modulation. Switching position indicator and fuse monitoring: integrated line monitoring to ensure plant availability
Compact design requires very little space. Easy to replace in-line disconnectors. High switching capacity.
People and plants protected against over- load and short circuit.
High level of personal and plant safety. Integrated measuring functions.
Load switching and disconnecting in a single system.
Reliably protect people and plants.
Reliably protect people and plants.

SIVACON S8 - features


[1] Variable busbar positions at the top up to 6,300 A

7KM PAC measuring devices
NEOZED, DIAZED, NH fuse systems
Communication capability
Simple connection to higher-level energy management systems: transparency of power flows as well as the recording of system status and network quality
Connection to management sys- tems
Special features
Power quality analysis
Comprehensive standardized accessories Functional design
Comprehensive range of products for all applications
Precise and reliable recording of energy values for supply, electric feeders, and individual loads
Comprehensive protection of people and plants against damage through fire, electric shock, lightning, or overvoltage
Safe and rapid switch-off to protect against overloads and short circuits

Connection to energy management, control, and automation systems

Analyze data, reduce energy costs, increase plant availability

For industrial plants to operate efficiently, their load must be constantly optimized and downtime reduced. The 7KM/7KT PAC measuring devices and communication- capable 3WA/3VA circuit breakers integrated in the power distribution board can help you achieve this.

They precisely and reliably record energy values for electric feeders or individual loads and display the values on-site. The communication-capable devices supply important measured values via standardized bus systems for the purpose of assessing the system status and power quality.

for maximum demands

Your benefit

  • System status and fault prevention are made transparent

  • Increase plant availability

  • Identify potential savings with transparent energy flows

  • Reduce energy costs

Data can be visualized and managed via measuring devices with an integrated web server and the powermanager power monitoring software. The measured data of the devices can easily be processed in higher-level automation and energy management systems as well as cloud applications. Because only by knowing your energy consumption you can reduce energy costs and ensure optimal system operation.

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IEC 61439

Project Checklist



Technology Partner


License to mark SIVACON S8 with the "Standard Mark"


License to mark SIVACON S8 with the "Quality Mark"

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The complete planning manual can be downloaded from: SIVACON S8 | Planning manual - Totally Integrated Power - Global (

Image source "© Siemens AG 2023, All rights reserved"

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