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Frequently Asked Questions

This section is for informational purposes only and should not be used as a design tool or to generate technical specifications. For further details, please contact CTI and discuss with a representative for clarification. Search for terms or questions by entering words or phrases in the text box and clicking Search, by selecting a category from the drop-down list and clicking Show. Then simply click on the linked term or question below.

Question: Open Delta Connection/ Interphase Connections

Answer: Open Delta Connection/ Interphase Connections This is a term used for describing the connection of two single phase transformers for use in a 3 phase power supply for transforming a 3 phase voltage. The open delta is the same as the closed delta described above except that one transformer is removed from the closed delta circuit. Open delta is less expensive but it presents certain limitations as compared with normal 3 phase connections.

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