電工C牌備試筆記

內容包括:

1.     General Knowledge   一 般 知 識

a.           Familiarization of relevant local legislative regulations and Electricity Ordinance, such as requirements for periodic testing and certification, obligations of electrical contractors and workers, registration requirements etc.

熟悉有關的本地法規及電力條例，例如有關進行定期測試及簽發證明書的規定、電業承辦商及電業工程人員的責任及註冊規定等。

b.          General understanding of the effect of electromagnetic fields and electric shock. Causes and prevention of electrical related fire incidents. Electrical accident investigation.

對電磁場及電擊的影響、電力所引起火警的成因和預防方法，以及調查電力意外的一般認識。

c.           General understanding of the need and procedures to assure electrical safety at work, it includes but not be limited to the safety precautions for working on low voltage installations, interlocking systems, circuit identification, safety documentations etc.

對電力安全，例如進行低壓電力裝置工程時須採取的預防措施、連鎖系統、作出識別及擬備安全文件等的一般認識。

2.     Design and Applications   設 計 與 應 用

a.           General understanding of various types of earthing systems their merits and demerits (e.g. TT, TN-S, TN-C, TN-C-s etc.), in particular the system adopted in Hong Kong . Selection of protective conductors and earth electrode. Calculation of earth fault loop impedance.

對各種接地系統，特別是本地的接地系統，及其優點、缺點的一般認識(例如：TT,TN-S,TN-C,TN-C-S等)；適當保護導體及接地極的選擇，以及接地故障環路阻抗的計算。

b.           Applications, design principles, principle of operation and characteristics of various types of power transformers and switchgears.

各種電力變壓器及開關設備的應用、設計原理、操作原理及特性。

c.           Applications, design principles, principles of operation, characteristics and starting methods of various types of electrical machines such as synchronous machines, induction machines, a.c. commutation machines, d.c. machines etc.

各種電機，例如同步電機、感應電機、交流電整流電機、直流電電機等的應用、設計原理、操作原理、特性及起動方法。

d.           Applications, characteristics, sizing and selection of different types of cables/overload lines with due considerations to load factor, diversity factor, power factor, voltage drop and maximum demand of the installation.

各種電纜/架空電纜的應用、特性、尺寸定位和選擇，必須適當考慮有關負載系數、不等率、功率因數、電壓降及裝置的最大需求量等因數。

e.           Factors affecting the design of substations, main switchroom, transformer room and emergency generator room such as clearance space, ventilation requirements, layout of electrical equipments, accessories etc.

影響設計電力分站、主開關房、變壓器室及緊急發電室的因素，例如間隙空間、通風設備、電力設備的配置和附件等。

f.             General understanding of circuit arrangement and segregation of different circuit categories.

對各類電路的電路安排和分隔的一般認識。

g.           General knowledge of the design of power distribution system such as load estimation of an electrical installation, single-line diagram representation of design, sizing and selection of different types of emergency generators to cope with essential load, power factor improvement, Supply Rules of the Power Companies including computation of tariff, conditions of supply etc.

對以下各項的一般認識：配電系統,例如電力裝置的負荷估計；設計的單線圖表示法；用以應付基本負荷的各種緊急發電機的尺寸定位和選擇；功率因數的提升；電力公司的供電規則，包括計算電費、供電條件等。

h.           Operating principles, characteristics and application of different types of protection schemes, protective devices on different types of electrical installation. Co-ordination and discrimination of protective devices. Calculation of fault levels of distribution system for deciding on the ratings of the protective devices.

不同種類電力裝置的各種保護裝置的操作原理、特性和應用；各種保護裝置的協調和區別；配電系統故障率的計算，以決定保護系統及裝置的額定值。

i.             Protection of structures against lightning.

裝置結構的避雷保護。

j.             General understanding of the affects caused by non-linear loads in the power system and methods of improvement.

由非線性負荷對供電系統所產生的影響及有關改善方法的一般認識。

k.           Illumination level calculations and application of different types of lighting equipment.

照明程度的計算及各種照明設備的應用。

l.             Requirements for installations under adverse conditions such as the presence of water or high humidity, presence of corrosive or polluting substances, installation exposed to fire or explosion, etc.

有關在不利條件下，例如存有水分或濕度過高、存有腐蝕性或污染物質、容易發生火警或爆炸的情況下，安裝電力裝置的規定。

3.     Installation, Testing and Commissioning  安 裝 、 測 試 和 校 驗

a.           General understanding of wiring installation enclosures such as steel conduit system, steel trunking system, plastic or PVC conduit or trunking, busbar trunking system etc.

對線路裝置外殼，例如鋼製導管系統、鋼製線槽系統、塑膠或聚氯乙烯導管或線槽、匯流排線槽系統等的一般認識。

b.           Pre-commissioning and commissioning tests on different types of electrical equipment such as generators, transformers, cables/overhead lines, switchgears, motors, capacitors, protective devices etc.

各種電力設備，例如發電機、變壓器、電纜/架空電纜、開關設備、馬達、電容器、保護裝置等的校驗前及校驗測試。

4.     Maintenance   維 修

a.           Corrective maintenance such as fault diagnosis and rectification techniques on electrical installation.

電力裝置的故障檢修，例如故障診斷及修理方法。

b.          Preventive maintenance and periodic tests such as functional tests on protective and control devices, wiring insulation resistance test, running test on motors, circuit protectors' tripping and operating mechanism check etc.

預防性檢修及定期測試，例如功能檢查、線路絕緣電阻測試、馬達的運轉測試、線路保護器的斷路及操作機械裝置的檢查等。

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