Free Trial Download and try today

4-Pole Transfer Switches

Posted on August 17th, 2021. Last updated on June 13th, 2023.

Q: The Volts field in the Transfer Switch dialog box only lists voltages with 1, 2, or 3 poles. How do I model a 4-pole transfer switch?

A: Select the appropriate voltage in a 3-pole configuration (3P 4W). Use the Notes Settings dialog box and the Insert and Modify Labels command to add notes to schedules and the one-line diagram that the transfer switch is a 4-pole transfer switch.

There are internal differences between 3-pole and 4-pole transfer switches, and each has different ground-fault considerations for the upstream devices. When transfer switches are being bought, and the system is being constructed, these differences do matter.

However, the number of wires and overall configuration of the feeders would be functionally identical in either case. Design Master’s wire and breaker sizing calculations would not change. Calculations for short-circuit fault, voltage drop, and arc-flash would also be unaffected. Therefore, modeling a 4-pole transfer switch as a 3-pole would not make any difference when creating your electrical distribution in Design Master Electrical.

Related Articles

Filter by
Post Page
Electrical Distribution Equipment (Panels and Transformers) Light Fixtures Training Recording Electrical Training Circuiting ElectroBIM One-Line Diagrams ElectroBIM Single-Line Diagrams
Sort by

Multi-Section Panels

Multi-section devices can either be modeled as one large device, or as separate devices connected via feedthrough.

8

Incorrect Light Distribution from Light Fixtures

Odd light distributions can be caused by differences between the light fixture block and the IES file.

8

The Circuiting Command

This training video teaches you how to use the Circuiting command in Design Master Electrical.

8

Feeder ID Formats

You can select four different feeder ID formats in the customization options.

0

Using Custom Feeder IDs

If you’re not happy with the built-in feeder ID formats, you can create your own custom feeder IDs.

0

Changing Feeder ID Formats

Changing your feeder ID format at the beginning of a project is simple; changing it mid-project requires deleting and redefining existing IDs.

0