Hi Steve:
The connector should have electrical ratings, both voltage and current per pin.
One question I have is the heating effect of running the same (rated) current
per pin throughout the connector. – whether this construction is included in
the ratings.
Since the voltage (and current) are “secondary” circuits, transient voltages
should be minimum or none. Therefore, spacings (both C&C) need only be for
rated voltage, not for transient voltages. Hi-pot test is rated voltage plus
some margin. (Maybe raise the hi-pot test voltage to breakdown to determine
the margin.)
Best regards,
Rich
Note: The IEEE is doing away with my [email protected] <mailto:[email protected]>
e-mail forwarding address. My fall-back e-mail address is
[email protected] <mailto:[email protected]> .
From: Steve Brody <[email protected]>
Sent: Sunday, September 27, 2026 7:13 PM
To: [email protected]
Subject: [PSES] Spacings
Hi experts,
I have a client who is using a cable with a 50 pin connector carrying 500VDC at
1 ms bursts to one pin at a time. 25 of the pins are ground, and the other 25
are used for the DC voltage. The odd number pins are used for the ground nd
the even numbered pins are dc.
There is another cable configured in the same manner, but this one has 300VDMS
and ground. The AC is also for a short bursts of time but I
don't know the timing.
Does the fact that the voltages are not continuous reduce the C&C? Can a hypot
test be used to confirm that there is not a problem even if the C&C are less
than Appendix K?
Both the AC and DC are derived from several circuits, but they come from an
approved AC SMPS that will fold back should there be a short and then recover.
None of the voltages are accessible.
Thanks,
Steve Brody
[email protected] <mailto:[email protected]>
C - 603 617 9116
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