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Modeling Special Equipment Configurations

I have a piece of distribution equipment with a special internal configuration, such as a Kirk key interlocking breaker or main-tie-main (MTM). How do I model that in Design Master Electrical?​

Generally, Design Master Electrical does not have a way to model those special configurations that cause a device to behave differently than a "typical" distribution equipment.

However, depending on how those configurations affect the rest of your model, you may not need to model them at all.

Determining What You Need to Model​

For your device’s configuration, answer the following questions:

  • Does it significantly impact your voltage drop, fault, or arc-flash calculations?
  • Does it affect how loads are calculated throughout the system?
  • Does it affect how the devices in the system are connected?

Yes​

‌If the answer to any of these questions is "Yes", you will most likely need to use other tools and workflows outside of Design Master Electrical to accurately model how the device configuration affects the rest of your model.

No​

If the answer to all of those questions is "No", then you do not need to model the configuration within Design Master Electrical at all.

When defining the equipment, ignore the special configuration. Define it and connect it to other devices as normal.

On schedules, floor plans, and the one-line diagram, use notes and manual drafting to indicate the special configuration.