Hi All,
I am investigating how IEC 61010-1 (safety) applies to a power supply I have designed.
Power supply description: Designed for Overvoltage Category II
- Input: 100-240VAC - 50/60Hz - 700mA
- Output: 160VDC - 300mA
12V - 1A
- Topology: Flyback (quasi-resonant)
Note 1: Feedback is done through an optocoupler
Note 2: There is a Y-cap bridging the insulation between primary and secondary grounds (for EMI)
Background:The 160VDC output is "turned on" at the output terminals through a relay that separates this 2 secondary circuits. I am trying to understand the creepage/clearance requirements between those 2 secondary circuits.
Problem:I don't know which one of the following items applies to this case (see image). Item b) seems compelling but primary and secondary aren't separated only by a transformer, there's an opto-coupler and
the Y-rated cap.

Can anybody please help me out with this one?
Copyright notice: I do not own the rights to the shared image but "fair use" arguments apply.