Repl. of Dev. Group with Dev. Grp with Special Tech. Inst. 
Purpose
You can use this process to install devices with different tasks in a meter board, for example.
Process flow
Device group A is replaced with device group B. The devices to be installed, 1b and 3b, take on the same tasks as the 1a and 3a, the devices to be removed. Device 2a is only removed because the device to be installed, 2b, has another task.
Example
Devices 1a and 1b are active current meters, devices 3a and 3b are watt meters. The device to be removed (2a) is an ARCR, but the device to be installed (2b) is a demand meter.
End of the example.
Replacement of device group with device group with special technical installation
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