[Hallb-engineering] DynaPower Box Supplies

Krister Bruhwel bruhwel at jlab.org
Wed Jan 12 14:00:13 EST 2011


I had a ZFCT chassis fail in November of 2010 on one of our Moeller 
Power Supplies (8000A 40V).  As our spare needed a mounting bracket that 
wasn't included, I robbed the chassis from an unused supply (the 
downstream Moeller because we are running TPE) .  Upon asking DynaPower 
for repair/replacement, I was met with some ambiguity and they would 
look into the problem.  Today I talked with Peter Abele, the Senior 
Sales Engineer, and his message was that they are still in the power 
supply business but they can no longer repair or manufacture the ZFCT 
chassis' or heads.  He will work with us on a long term solution of 
trying to retrofit something (undefined as of yet) or using shunts if 
the accuracy is sufficient. 

This message may impact anyone that needs to support a box supply from 
DynaPower.  At present Hall B does not have a spare ZFCT chassis.  After 
I get a bracket made, I will need to test the unused spare, to ensure we 
can use both Moellers for upcoming experiments.  If anyone has a ZFCT 
chassis that I can use as a spare, please let me know.   If anyone knows 
of options that we can utilize in the short or long term, please let me 
know.   Its important for Hall B to understand that this may affect 
experiments in the future as we have no spares at present.

These supplies are to be used through the 12GeV upgrade and a long range 
solution is needed. 

I will advise as more details become relevant, and please forward this 
message to concerned parties.

Krister Bruhwel

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