Ran into a similar problem with the thermals - they tripped during the
72 hour 55C operating limit test. Could have gone larger but it had more
problems than fitting in the magnetic units.
Gary
-----Original Message-----
From: John Juhasz [mailto:[email protected]]
Sent: Wednesday, August 07, 2002 11:28 AM
To: 'David Heald'; 'EMC_PSTC'
Subject: RE: Thermal breakers vs magnetic breakers for telecom
Yeah, I had used them . . . once.
As they were a lower cost circuit breaker we spec'd them into a telecom
system. What we didn't think about was the temperature extremes.
For the higher temp tests for NEBS the higher temp breakers
were too large and too expensive - for my management anyway.
I suppose they could serve a purpose during the fire spread
test - power disconnection of chassis.
Just a couple of thoughts . . .
John A. Juhasz
GE Interlogix
Fiber Options Div.
Bohemia, NY
-----Original Message-----
From: David Heald [mailto:[email protected]]
Sent: Wednesday, August 07, 2002 11:18 AM
To: 'EMC_PSTC'
Subject: Thermal breakers vs magnetic breakers for telecom
Greetings all,
In the spirit of the continual quest for cost reduction, I have been asked
to look into the use of thermal circuit breakers instead of magnetic ones.
It seems like we rejected thermal breakers before for some reason, but now
no one can remember why.
Does anyone know of any telecom (or general) reasons why thermal circuit
breakers may be unacceptable for telecom products?
Thanks and Best Regards,
Dave Heald
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