电工面试问题之二

NorthernWolfy

我是在这里逆风而上的人,我也是第一个在这里说"假电工"而被斑主糟蹋的人.我的目的没有别的,只是希望各位保持低调,虚心学习,少点吹嘘.不要老以自己在国内是什么学历和工程师而自居.因为我的同事门经常谈到中国移民电工问题,我感觉很不光彩.
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书归正转,以后在时间允许的时候,我将帖一些电工面试的常见问题,我不是电工专家,我的知识很窄,我只是写一些我知道的,不要问我我没有贴出来的问题,问我我也不知道.我不是班门弄斧,希望有才之士批评,指正,补充.目的只有一个,增加知识,为中国人争点气.

$ K3 B& @" r. X# M有过面试经历请跟贴,贴出你面试的问题.
8 N3 S) [- g6 d* B$ S问题2:What do the following ANSI/IEEE devices number mean in electrical protection?
      50; 51; 52; 83; 86; 87; 27; 59; 21; 43
答案:自己找

chiau

List of Device Numbers
7 H- M( G: q" d# ^; wClick to learn more...

2 L+ t  X# w6 x/ {/ Y    * 1 - Master Element
    * 2 - Time Delay Starting or Closing Relay
/ _: i, O7 ^& t: m  M, y6 k* l    * 3 - Checking or Interlocking Relay
    * 4 - Master Contactor
    * 5 - Stopping Device
    * 6 - Starting Circuit Breaker
: D' C2 a( m, W5 z) A    * 7 - Anode Circuit Breaker
: w7 j9 U) c- q8 @    * 8 - Control Power Disconnecting Device
* A0 o) i# h: w0 O9 W, u    * 9 - Reversing Device
' L7 \% X% J( S5 X0 E    * 10 - Unit Sequence Switch
$ j' K5 W0 O; R! F, V    * 12 - Overspeed Device
    * 13 - Synchronous-speed Device
    * 14 - Underspeed Device
    * 15 - Speed - or Frequency-Matching Device
" `5 |  @, x, E    * 21 - Distance Relay
    * 23 - Temperature Control Device
    * 25 - Synchronizing or Synchronism-Check Device
3 n# o$ {' `7 U- x$ g% s0 B- m9 W    * 26 - Apparatus Thermal Device
    * 27 - Undervoltage Relay
    * 29 - Isolating Contactor
    * 30 - Annunciator Relay
    * 32 - Directional Power Relay
% ~- s8 ]5 j" K) m. X  j2 w) r" E    * 36 - Polarity or Polarizing Voltage Devices
    * 37 - Undercurrent or Underpower Relay
    * 38 - Bearing Protective Device
    * 39 - Mechanical Conduction Monitor
" g& N. _, H$ D- U* B8 Y    * 40 - Field Relay
    * 41 - Field Circuit Breaker
    * 42 - Running Circuit Breaker
3 Q4 H/ G+ o" a; g$ U1 d; W    * 43 - Manual Transfer or Selector Device
    * 46 - Reverse-phase or Phase-Balance Relay
6 j! [" |6 X) C8 Y! D1 t( k    * 47 - Phase-Sequence Voltage Relay
% z/ L: r* c( j& c2 k: S    * 48 - Incomplete-Sequence Relay
    * 49 - Machine or Transformer Thermal Relay
    * 50 - Instantaneous Overcurrent
% \7 \$ F) K6 u0 o, w0 A& K- K    * 51 - AC Time Overcurrent Relay
7 l  B7 E) O% t# ~% Q( N0 G2 n    * 52 - AC Circuit Breaker
& P- j$ A! t4 ?$ h; t    * 53 - Exciter or DC Generator Relay
" Y, ?7 y. v4 V    * 54 - High-Speed DC Circuit Breaker
    * 55 - Power Factor Relay
    * 56 - Field Application Relay
    * 59 - Overvoltage Relay
    * 60 - Voltage or Current Balance Relay
    * 61 - Machine Split Phase Current Balance
    * 62 - Time-Delay Stopping or Opening Relay
    * 63 - Pressure Switch
    * 64 - Ground Detector Relay
    * 65 - Governor
    * 66 - Starts per Hour
: B0 p$ [/ [; f) a  N    * 67 - AC Directional Overcurrent Relay
    * 68 - Blocking Relay
    * 69 - Permissive Control Device
    * 71 - Level Switch
% L. j! r3 d* M, k( G    * 72 - DC Circuit Breaker
    * 74 - Alarm Relay
# `6 V* H  e, N- H5 @$ @    * 75 - Position Changing Mechanism
" S6 _8 X0 [6 D  B" Z    * 76 - DC Overcurrent Relay
    * 78 - Phase-Angle Measuring or Out-of-Step Protective Relay
& J3 V) x# m& a    * 79 - AC-Reclosing Relay
    * 81 - Frequency Relay
    * 83 - Automatic Selective Control or Transfer Relay
    * 84 - Operating Mechanism
    * 85 - Carrier or Pilot-Wire Receiver Relay
    * 86 - Lockout Relay
$ q9 o5 \) S/ ]$ V9 e    * 87 - Differential Protective Relay
& N: i. \# c- @7 h) k    * 89 - Line Switch
0 Z1 B# G; V8 K, Q% W7 y    * 90 - Regulating Device
    * 91 - Voltage Directional Relay
    * 92 - Voltage and Power Directional Relay
    * 94 - Tripping or Trip-Free Relay
. a4 h" y) D0 q    * 95 - Reluctance Torque Synchrocheck
    * 96 - Autoloading Relay

changlu

lz,我感到这样的问题是不是对电工难了点,其中有几个保护设备都没有用过.

changlu

对不起,我是说我没有用过.

NorthernWolfy

原帖由 changlu 于 2009-1-11 20:12 发表
1 B; U) F8 F  e8 alz,我感到这样的问题是不是对电工难了点,其中有几个保护设备都没有用过.

2楼的列出了所有的代号,我列出的是最常用的几个.

changlu

Differential Protective Relay,是不是就是差动保护?

changlu

可以帮忙把这个表翻译成中文吗?谢谢

NorthernWolfy

原帖由 changlu 于 2009-1-11 21:09 发表
4 @& H3 v, U! D9 N1 pDifferential Protective Relay,是不是就是差动保护?

你说的对,比如说 BUS Differential, Transformer Differential.

老警察

我只见过52和86，还是做电工之前的事。这些对工业电工很有用。对建筑电工来说可能一辈子都用不着。油砂工地的电工工作主要还是做cable try, pull cable, termination, bonding structure, install EHT (electric heat trace) SR & MI 两类，如果掌握这些工作中所使用的工具和器材就应该能应付大部分工作了。当你经验多了还可以做做QA/QC工作。
分享：做工重要做人更重要。做工时我们是上司的工具，工具好用他就多用，不好用就会被扔掉。
余下的慢慢分享

MrElectrician

原帖由 老警察 于 2009-1-13 04:09 发表
" o* k0 Z+ ]# N, T我只见过52和86，还是做电工之前的事。这些对工业电工很有用。对建筑电工来说可能一辈子都用不着。油砂工地的电工工作主要还是做cable try, pull cable, termination, bonding structure, install EHT (electric hea ...

I agree with you.

7 [: p/ h0 ~. w: ?) [If one understands very well about the high voltage protection system, I believe he does not need to worry about finding an electrician job anywhere in Canada. Most these things are used for power house or utilities, and large pump stations.....
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For most of electricians at most time, I would say basic skills and experience is more important.

jjj18

原帖由 changlu 于 2009-1-11 21:11 发表
可以帮忙把这个表翻译成中文吗?谢谢

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