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本帖最后由 nnren 于 2011-2-11 16:45 编辑
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想贴出来给大家看看。$ y9 a+ |3 j- b$ J) ^9 A
" Z0 ~) W. B8 j! w& Y6 r- bSubject: Real Electrical Fire Example
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+ H0 k- }7 i8 s0 x5 n% PBasic facts of the case: *
. e: M- ^* o# f' F---Electrician received a work order to inverstigate why hall way lights wre not working in an underground pedestrican tunnel between two buildings0 S2 E' O9 L3 m
---Electrician went alone to investigate an electrical panel in a mechanical room where he thought the breakers were located. Note: the mechanical room is located in the same underground pedestrian hallway.* i: Z4 g# V: \
---Electrician entered the room and when he opened the panel door, observed a series of breakers that were open in tripped position.
; {2 o1 g7 d6 [5 H---Electrician assumed since the breakers were in the same general area, they controlled the hallway lights.
6 c/ D y# ~7 O* f6 U---When the electrician closed the breakers, they immediately tripped again.
' s9 Q4 S- b! m( N$ N6 v( J---The electrician again closed the breakers and this time they stayed closed.
7 w8 o, E$ E: P% t* @---The electrician left the mechanical room to investigate whether the lights had come on or not.$ P+ E$ g# L+ U) a9 Q' j4 q0 G
---The hall lights had not come on , so the electrician assumed there was another electrical panel for the hall lights, and went to maintenance to find a print.
2 B& }/ G8 }! v1 l---Sometimes later, as a security guard was passing the door that led to the mechanical room, the observed smoke coming from the electrical box and immediately called for an emergency.- g0 ~6 r: J; ~. O' C& g
---The underground pedestrian hallway was located above one of the office buildings, and therefore the entire office building had to be evacuated because of the fire and smoke.7 J0 W' X+ A$ l# x
---The local fire department was called and fire was extinguished.
( O6 E& U4 N7 [# f# y' k! k---Damage was confined to the mechanical room.
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Additional Information---Mechanical room contained steam lines, chilled water pumps, and electrical panels
" u2 i: a S$ E/ }: x+ v---Room was kept under lock and key: X0 C( Y1 m4 Z5 u ?0 J/ X
---The electrical panel did not have circuit breaker labels.# O9 H& ?& F+ }) f( K
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Discuss: --- What went wrong with this assignment?
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' f/ n8 Y3 w o答案等有些回应再贴吧。 |
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