Emergency power generators either have an integrated diverter switch or can be connected (or disconnected) in the distribution system using a separate diverter switch.
The following options are available depending on the application:
Emergency power generator with integrated diverter switch
In terms of distribution, this scenario involves a simple power supply connection with a fuse, meter, surge protection, and a line leading to the emergency generator.
A second, separate supply line runs from the emergency generator, to which the main house wiring is connected.
By selecting the “230/400V mains supply” node, you have the option of creating another 230/400V network to represent these two separate supply lines.
For the first power feed, you then only create the outgoing line to the emergency generator. For the second power feed, configure it as a 5-pole feed, deactivate the automatic components (such as the fuse and surge protection), and install the actual protection devices for the house’s electrical system.
Here is an example plan:
Diverter switch in distribution system
If a separate diverter switch is installed in the distribution system, there are two ways to display it, which differ in degrees of freedom and level of detail:
- Option 1: Free drawing
- Option 2: Automatic plan via disconnect switch
Option 1: Free drawing
Under “Additional Pages” -> “Free Drawing” you can create a separate page for the power feed. We have created a template here that contains the typical scenario of a diverter switch, which you can easily access and customise:
The basic idea is that you largely deactivate the feed-in in the automatic plan and only start the automatic plan with the first protection device after the feed-in. Feel free to create a manual note that refers to the feed-in diagram in the appendix.
For free drawing, you can utilise all degrees of freedom, which can be very advantageous, especially for custom feed-in configurations.
Option 2: Load switching via disconnect switches in the automatic schedule
If you want to remain 100% within the automatic schedule, there is an alternative solution. You can connect two disconnect switches to each other and assign them the same item designation. They then symbolise the two combined paths at the diverter switch.
This looks as following in the diagram, for example:
The elements were laid out as follows in the diagram:
- the two disconnect switches are connected to each other. The branch is terminated with a terminal block that represents the emergency power supply.
- the actual distribution is then created under the first disconnect switch.
It may be helpful to create this as a separate “power feed” project. This prevents the tool from later extending the diagram with branches if the rest of the drawing no longer fits vertically on the page. A single license allows you to implement multiple projects belonging to the same customer project, even with just one single project license.
