What is the difference between Motor Connection "Inside Delta UI" and "Inside Delta IU" in PSTX soft starters?
For parameter 28.43 in PSTX soft starters, there are several options for motor connection, two of which are Inside Delta UI and Inside Delta IU.
I know what an inside delta connection is, but what do the UI and IU indicate here exactly? Thanks.
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Never mind guys I found the answer in the Installation and Commissioning Manual.
I had been looking in the short form user manual before submitting the question. Basically, the difference between UI and IU is just a matter of phase order. There are several combinations available for configuration in the manual, page 39 namely. Regards, Zahi
Source: PSTX Installation and Commissioning Manual (1SFC132081M0201)
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