Roland chung
Trusted Information Resource
Dear all,
This is my first post here. I found some experts herein and hope to get some useful information from this forum.
We manufacture X-ray equipment for diagnostic purpose. As you can see from the caption, my question is related to reference voltage of three-phase transformer (reference voltage used for determination of clearance & creepage, etc). In our X-ray equipment, the primary part (line to line voltage is 400V) of three-phase transformer is delta connection (without neutral) and the secondary part (line to line voltage is 208V) is star connection (the neutral combines the earth, as referred to PEN).
Wondering how to consider the reference voltage between input line (primary) and earth (barrier A-a1 in iec 60601-1), between input line and output (barrier 17.g.4 in iec 60601-1).
Thanks in advance.
This is my first post here. I found some experts herein and hope to get some useful information from this forum.
We manufacture X-ray equipment for diagnostic purpose. As you can see from the caption, my question is related to reference voltage of three-phase transformer (reference voltage used for determination of clearance & creepage, etc). In our X-ray equipment, the primary part (line to line voltage is 400V) of three-phase transformer is delta connection (without neutral) and the secondary part (line to line voltage is 208V) is star connection (the neutral combines the earth, as referred to PEN).
Wondering how to consider the reference voltage between input line (primary) and earth (barrier A-a1 in iec 60601-1), between input line and output (barrier 17.g.4 in iec 60601-1).
Thanks in advance.
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