We have been doing some homework on the interesting topic of energy
hazards (as defined by 950) and wondered if any of you may have some
insight into the origin of "Continuos energy level of 240VA" and "20
joules". The kind of information I'm looking for is along the following
lines:
1) Where did the physics behind these particulat values come from?
2) Rationale to the selection of these limits?
3) What is the actual definition of "continuous" as it pertains to
240VA?
This is in reference to the time necessary for a protected circuit
fall within limits of the specified values in a fault or condition
or when two poles of a circuit are bridged.
4) What is the actual hazard associated with energy?
We are obviously talking of burn hazards but is there consensus as to
whether this burn hazard is related to
common objects such as rings and watches coming in contact with the
hazard or propulsion of molten material
from metalic objects (or both)? (Any more you can think of)?
Regards,
Bob Pereira
Product Regulatory Compliance
NOTE: Please respond to me using my direct address. Our servers are having
difficulty routing/receiving general messages to EMC-PSTC.
