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Power supply setup HP66000 series

Question asked by djmille on Sep 27, 2010
Latest reply on Apr 12, 2011 by StevenLee

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Can you setup multiple power supplies to all trigger on at once with a TTL trigger and then if there is a short that puts one supply into OCP mode that will then shutdown all the supplies instantaneously on power up? At this time I have understood that you can trigger all the supplies on at once and then program the devices to look for a backplane trigger to power off on an OCP event. This programming step after the supplies are on takes too long and does not protect the hardware for a short on power up.

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woliurbe Sep 30, 2010 1:11 PM
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To configure all of the power supplies to turn off when one supply goes into OCP I would us the Discrete Fault Inhibit capability of the 66000 series instead of the Trigger System. You will need to connect the FLT of each mainframe to its own INH and the other mainframes' INH. This way when a mainframe trips the FTL trigger it will pull the INH of every mainframe and disable all of the power modules.

Below are the commands to configure each power module such that when a OC, OV or OT condition occurs it will cause a FLT trigger.
OUTP:DFI:STAT 1
OUTP:DFI:LINK QUES
STAT:QUES:ENAB 19

You will also need to make sure that the switches of each power module is configured so that Remote Inhibit is enabled.
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StevenLee Apr 12, 2011 9:21 AM
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Hi,

Looking at the initial post, the question seems to be whether there is a shorter step to setup the fault/inhibit system such that a very fast OCP conditiion at turn-on can be detected. Right now, it seems like the fault/inhibit is being setup after the turn-on and it fails to pick up an OCP condition that happens shortly after the turn-on before the fault/inhibit setup. My suggestion to be to setup the fault/inhibit system(send over the necessary commands) before the outputs are triggered to turn on. This will allow the power supply to pick up an OCP event at turn-on and consequently shutdown the outputs. Other than changing the sequence of the setup, as described, i don't see a shortcut to doing this fault/inhibit setup. Let me know if I've addressed the your question.

Steven
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Power supply setup HP66000 series

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