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Broken Bulb safety trip: 12/14/98 Electronic Design - Ideas
for Design / A classic safety requirement involves disconnecting
the ac mains supply from a light bulb should the glass envelope
become broken. Although the filament can draw a much higher than
normal current upon exposure to air prior to burning out, this
can’t. . . |
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G.F.C.I.: A Ground Fault Circuit Interrupter (GFCI) is a
device to protect against electric shock should someone come in
contact with a live (Hot) wire and a path to ground which would
result in a current through his/her body. The GFCI operates by
sensing the difference between the currents in the Hot and
Neutral conductors. Under normal conditions, these should be
equal. However, if someone touches the Hot and a Ground such as
a plumbing fixture or they are standing in water, these currents
will not be equal as the path is to Ground - a ground fault -
and not to the Neutral. This might occur if a short circuit
developed inside an ungrounded appliance or if someone was
working on a live circuit and accidentally touched a live wire.
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Ground Fault Interrupter: |
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Ground Fault Interrupter: National Semiconductor
Application Note MP1851 June 1992 |
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Ground Fault Interupter: |
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