鲜花( 0) 鸡蛋( 0)
|
本帖最后由 nnren 于 2011-2-11 16:45 编辑 - U q4 E: D i# R4 S
6 g' c& A1 ?9 K9 M/ E
想贴出来给大家看看。3 h2 I" Y! U# p/ A
+ X$ q' s, l* }5 R" f4 F- Q
Subject: Real Electrical Fire Example, j1 ~* {1 z g
8 t! `) D% K( J4 V; Z; \0 `
Basic facts of the case: *; d, I' m) F. q2 w
---Electrician received a work order to inverstigate why hall way lights wre not working in an underground pedestrican tunnel between two buildings
: V2 b" g; [& W4 z, y7 |) X---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.
9 \1 ~% V# g- m2 s6 }! o---Electrician entered the room and when he opened the panel door, observed a series of breakers that were open in tripped position.1 G+ f# _3 ~- B' \* h$ r6 h. `
---Electrician assumed since the breakers were in the same general area, they controlled the hallway lights.
* |- i( n' `6 u6 e F( X---When the electrician closed the breakers, they immediately tripped again.* t6 z- B7 K1 z ~
---The electrician again closed the breakers and this time they stayed closed.
, c7 ]* @. d, K5 r# Q3 E---The electrician left the mechanical room to investigate whether the lights had come on or not.5 Y8 h3 g# _, j% T: x8 A1 p
---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.
( m) Z8 ]1 K3 a& N- ^---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./ E" a/ p! t6 G( {) ?1 W! q8 O, ]
---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.
) K- ^7 I0 q7 h---The local fire department was called and fire was extinguished.
. h$ d$ m5 c }% ~8 r---Damage was confined to the mechanical room.# C4 I0 p$ P+ `, {. t( y
/ C2 w( {$ d' w2 c$ CAdditional Information---Mechanical room contained steam lines, chilled water pumps, and electrical panels
$ h6 j; C7 ?. u0 f/ S---Room was kept under lock and key0 c4 t g) t; I* P
---The electrical panel did not have circuit breaker labels./ H: I* G9 s Z8 w7 j( K
6 t+ K% _+ |% {1 w' C
Discuss: --- What went wrong with this assignment?& c3 K( }3 v; x; T
- \/ A, [! ~- }7 U+ X答案等有些回应再贴吧。 |
|