The type-tested low-voltage ENERGON switchgear system with withdrawable unit technology is used for applications with high availability and great flexibility.

There are numerous cubicle and module variants which can be used to provide the optimal solution for the varying requirements of customers in infrastructure, industry and energy supply.

NATUS benefits

  • Switchgear system arc-tested in accordance with DIN EN 61439
  • Isolation of individual function compartments
  • Modular cabinet system
  • Replacement and refitting possible while running
  • Highest personnel protection through internal arc protection zones
  • Manufacturer-independent fitting
  • Smart switchgear via common bus systems
  • Single and dual front arrangement possible
  • Multiple busbars in one cubicle possible
  • Handy cable connection compartment (400 mm / 600 mm)
  • Simple, secure locking system

NATUS highlights


Patented contact mechanism, double transfer system for safe isolation of the withdrawable unit

  • Highly functional withdrawable unit technology
  • Safe isolation of the power circuits (back) and control circuits (right) via a mechanical contact process using the operating handle (front)
  • Can only be operated when the door is shut, for safety reasons
  • High operational safety via operator guidance and locks
  • Simultaneous isolation of the power circuits, input and output side
  • Provision of operational, test and isolation setting
  • No connected cable movement (prevents splaying)
  • Internal arc-protected zone in combination with ARC-SAFE distribution busbar
Withdrawable unit with DTS contact system


The safe distribution busbar for withdrawable unit and plug-in technology

  • Complete, automatic cover of the live phases by the automatic shutter
  • Highest internal arc safety via complete enclosure and isolation of the phases from one another
  • Internal arc-protected zone in combination with DTS contact system
  • Enables modification of the system when live
  • IP4X operator protection when door is open
  • Also available in fuse block
ARC-SAFE distribution busbar in MD withdrawable unit cubicle with automatic shutter
ARC-SAFE distribution busbar in SD fuse block with removable covers (yellow)


The unique door lock sets the standard in safety and ease of use

  • Arc-tested functional design
  • Simple, easy one-handed operation, no need for tools
  • Prevents operational errors (the operating personnel can see remotely that the doors are closed properly)
  • Optimal personnel protection


Flexible system configuration with busbars at the top or behind and one or more bars running in parallel.

Dual front (back-to-back) with busbars at the top
Dual front (back-to-back) with busbars at the back


Design-tested Low Voltage IEC 61439
Power Switchgear DIN EN 61439
Testing under conditions due to
internal faults (arc fault)
Arcing current Iparc 65 kA
Rated operation voltage (Ue) up to 690 V
Horizontal main busbars  
Rated current up to 6,300 A
Rated peak withstand current (Ipk) up to 220 kA
Rated short-time withstand current (Icw), 1s up to 100 kA
Incoming supply, coupler or outgoing feeder (ACB) up to 6,300 A
Incoming supply, coupler or outgoing feeder (MCCB) up to 1600 A
Outgoing feeder (drawer)  up to 630 A
Motor starter, drawer up to 315 kW
Internal separation Form 2b up to Form 4b
Up to Form 4b type 7
Degree of protection IP30 up to IP54