| Thread Links | Date Links | ||||
|---|---|---|---|---|---|
| Thread Prev | Thread Next | Thread Index | Date Prev | Date Next | Date Index |
Rick,
I do not understand where the demand to test Hipot while the unit is running came from. There is no any requirement for that on any of the safety agencies standards. Can you explain why you are insisting on testing the Hipot with the power on?
Avinoam Levy
Chief Engineer
PowerDsine Inc.
avinoaml@xxxxxxxxxxxxxxxxx
Phone (631) 756 4680 Ext. 305
Fax (631) 756 4691
Web-site: www.powerdsine.com
-----Original Message-----
From: Rick Brooks [SMTP:ribrooks@xxxxxxxxxxxxxxxxxx]
Sent: Mon, August 28, 2000 9:10 AM
To: stds-802-3-pwrviamdi@xxxxxxxx
Subject: testing Hipot for DTE power
Hi all,
I have drawn up a simple test fixture for performing Hipot testing on DTE powered ports.
It applies the high potential to all pins, but also allows for DTE power by providing a load for the DTE power supply.
The proposal is at:
http://www.ieee802.org/3/power_study/public/email_attach/hipot_test_power_on.pdf
My point of view is that if the topology of a powered port does not change from DTE power off to DTE power on,
then we can test Hipot with power off, as we usually do.
However, if the output topology does change, then we must test Hipot both with power off, and with power on.
The existence of a power switch in the powered port topology, is one possible example of how the topology can
be different with the power off and on.
thanks,
- Rick