The ACIE main distribution consists of a modular 400 V AC switchboard which is divided into two symmetrically arranged sections. Both sections contain a field feeder, which connects to the respective busbar via a motor switch.
 

The left section of the switchboard is intended for supply of devices via the local power grid. The field feeding is connected to the public grid of the TUHH and various laboratory devices are connected to the switchable outputs. In total, the switchboard for the public grid consists of five switchable outputs. The rated output current as well as the connected equipment can be taken from the table below.

The right section of the switchboard is designed for setting up an isolated test distribution in the lab. The field feeding consists of a CEE-plug protected by a control cabinet with a door contact connected to the emergency shutdown, which is designed for connecting sources to the isolated test distribution. The motor switch connects the field feeding via a bus bar to a total number of six outlets from which four are easily accessible by 32 A CEE outlets. The rated output current of the individual fields are listed in the table below.

The switchboard is equipped with measurement points including three-phase, contactless current measuring transformers as well as three-phase voltage measurements, including neutral. All connection endpoints of the measurement points are routed to a switching matrix in the center of the ACIE switchboard, which allows for switching between measurements with special power analyzers or measurements with Bachmann grid measurement modules of type GMP232/4. In total, six three-phase power measurements can be carried out in parallel by the Bachmann measuring unit and the results can either be used in Matlab via a co-simulation platform or are sent to the laboratory's SCADA system.