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本帖最后由 nnren 于 2011-2-11 16:45 编辑 6 g1 d: Y' ?: g$ Q" E. G4 c9 C( ]
; j+ w2 g I G+ y& E$ I想贴出来给大家看看。
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& J, T9 d' Z, T- c% Q0 `9 U8 fSubject: Real Electrical Fire Example/ k" Y& I/ R5 F9 h/ q2 `- U4 `" b9 e( ~9 Q2 ?
6 Y/ }0 n9 K5 o" W9 pBasic facts of the case: *
6 @% }& Y$ t: [* m7 H---Electrician received a work order to inverstigate why hall way lights wre not working in an underground pedestrican tunnel between two buildings3 @4 b) W$ v. D" s! { o
---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.# m; O$ I, e2 v' e) Z: m
---Electrician entered the room and when he opened the panel door, observed a series of breakers that were open in tripped position.
' `: R2 m, Q9 N V---Electrician assumed since the breakers were in the same general area, they controlled the hallway lights.
" L, {% `+ p5 l9 ]& A---When the electrician closed the breakers, they immediately tripped again.
$ e9 e, F* V ^3 L( W---The electrician again closed the breakers and this time they stayed closed.4 x) @1 G$ g$ a, u7 o* @
---The electrician left the mechanical room to investigate whether the lights had come on or not.
H' F, M( \7 R0 o6 ^/ x---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.( E: Q) c$ ?- U5 h" e M# W
---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.0 w2 f1 [/ C2 i7 A# W5 R8 p- f
---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 I; t; K! y# `/ k" A---The local fire department was called and fire was extinguished.
$ v/ {# e9 D2 ~9 H) H8 g---Damage was confined to the mechanical room.7 f8 m2 \6 Q% T, l2 V4 `
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Additional Information---Mechanical room contained steam lines, chilled water pumps, and electrical panels
" j1 L% K" J2 _- O---Room was kept under lock and key, C0 x" Y3 T7 r9 v2 d$ z2 T
---The electrical panel did not have circuit breaker labels.8 T& A. U1 R2 ~9 Z- r" _! Q
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Discuss: --- What went wrong with this assignment?) \0 y- l$ g* H( y
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答案等有些回应再贴吧。 |
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