Inrush peak for 50/60Hz transformers mostly from magnetizing current - core
saturation and residual flux, and of course input V. As the saturation curve
does not extend past the pi/2 inrush peak, any further inrush past a few mSec
is typically from filling up the coulomb buckets on the
Hi Brian:
I can't help you with the CEC.
Both the NEC and CEC are quite wrong to specify
overcurrent protection as a function of rated
input current.
Overcurrent protection is protection for fault
condition current, which is not a function of
rated input current. The fuse value is always
Hi Rich,
You mention the failure modes of a mains frequency transformer. I'd expect the
same applies to switch mode high frequency transformer, or is there something
else to consider?
A good article! - I just skimmed it :).
Cheers,
Gary Tornquist
Microsoft
From: Richard Nute
In message 000201d06978$5f687e60$1e397b20$@ieee.org, dated Sat, 28 Mar
2015, Richard Nute ri...@ieee.org writes:
Thermally-caused insulation failure can be controlled by a fuse in the
primary. Load the secondary and measure the insulation temperature.
I think you have to reduce the load
Admittedly it is out of context (and refers to impulsive, wide band,
emission) but you might use the precedent of CISPR14 Emission . Household
Appliances, electric tools and similar apparatus which has a section 4.2
covering Discontinuous Disturbances.
It is worth a look - but too detailed
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