Chapter 1 Introduction 1

First, the concept of electrician 1

Second, the classification of electrician 1

Third, the electrician's professional ethics 2

Chapter II Use of Common Electrical Instruments 3

I. Main types of portable electrical maintenance instruments 3

Second, the use of clamp ammeter and matters needing attention 4

Three, the use of multimeter and matters needing attention 5

Four, the use of insulation resistance meter and matters needing attention 6

Five, the use of grounding resistance tester and matters needing attention 8

Six, instrument storage and verification cycle 8

Seven, the use of new electrical instruments 9

Chapter III Use of Common Electrical Safety Appliances

I. Structure and Use of Insulating Pull Rod 33

Two. Structure and use of insulating clip 34

Three. Use and Precautions of Auxiliary Safety Devices 34

Four, temporary grounding wire and its use method 35

Verb (abbreviation of verb) temporary fence and its usage 36

Intransitive verb insulation partition and its use method 36

Seven, the fence rope setting and matters needing attention 36

Eight. Signs and their usage 37

Nine, the correct use of burn prevention equipment 37

X. How to use ladders, stools and forklifts 38

XI。 How to use the anklet and seat belt 38

Twelve. Preservation of electrical safety equipment 39

The fourth chapter commonly used electrician basic operation skills 42

The first section the use of common tools 42

Section 2 Connection Technology and Requirements of Conductors 52

I. General requirements and standard specifications for wire connection 52

Second, the wire connection method and technology 54

Iii. Connection method of wires and equipment parts 6 1

Section 3 laying of wires and embedding of embedded parts 62

A, cooperate with civil concealed pipeline and iron 62

Second, the pipeline threading process method 8 1

Three. Installation of bare bus in No.87 industrial workshop

Four. Installation of surface mounting line 90

Section 4 Common ammeters and connection methods 10 1

I. AC voltmeter 10 1

Ii. AC ammeter 10 1

Iii. AC watt-hour meter 102

Iv. DC voltmeter 103

Verb (abbreviation of verb) DC ammeter 103

Six, DC watt-hour meter 105

Section 5 Installation and Operation of Low-voltage Overhead Lines 105

I. Installation of Low-voltage Overhead Lines 105

II. Operation of Low-voltage Overhead Lines 132

Section 6 Grounding and Lightning Protection Technology 136

I. Grounding Technology 136

Second, the lightning protection technology 148

Chapter V Testing and Selection of Common Electrical Components

And installation wiring 150.

Fuses and low-voltage load switches 150

Two. Ac contactor and transfer switch 156

Iii. Low-voltage Circuit Breaker 159

Four, leakage protector 160

Verb (abbreviation of verb) thermal relay 166

Six, current transformer 167

VII. Time Relay and Intermediate Relay 169

Eight, motor starter 170

IX. Lighting switches and sockets 176

X. lamps and lighting equipment 178

XI。 Selection of conductor 180

Twelve, lightning arrester 190

Thirteen. Wall bushing 190

Fourteen Insulator 19 1

Fifteen. Inverter and soft starter 193

Chapter VI Small Power Transformer 2 1 1

A, transformer inspection and test 2 1 1

Second, the transformer installation wiring 2 1 1

III. Safe operation of transformer 22 1

Chapter VII Small and Medium-sized Motor 225

A, motor inspection test 225

Second, the analysis of common motor starting control circuit 233

Three, the motor general fault handling method 238

Four, small motor repair 240

Verb (abbreviation of verb) Operation of motor 247

Six, single-phase motor starting control circuit analysis 252

The eighth chapter common electrical fault treatment method 254

The first section using observation method to judge the electrical fault 254

In the second quarter, electrical circuit fault treatment method 256

A, shaft tilt processing method 256

Second, the operation method of replacing the lever 257

Three. Other faults of surface mount circuit and their treatment methods 257

Four, hidden line fault handling method 258

In the third quarter, the treatment method of power distribution equipment failure 259

A, abnormal operation of power transformer and defect treatment method 259

Second, the abnormal operation of low-voltage distribution system and defect treatment method 260

Three. Matters needing attention in operation of low-voltage electrical appliances in low-voltage distribution system 6 1

The fourth quarter motor fault treatment method 265

A, motor fault handling procedures and points 265

Second, the motor internal fault and diagnosis 268

The fifth section lighting device fault treatment method 27 1

A, lighting device fault handling points 27 1

Second, the inspection and testing of lighting circuit 27 1

Three. Matters needing attention in power transmission and lamp test 272

Four, try to deal with the fault in the process of lamp 273

Chapter 9 Electrician Reading Drawings 279

Section 1 Basic knowledge of drawing pictures 279

I. Commonly used graphic symbols 279

Second, the commonly used text symbols 285

Three, electrical equipment and wiring labeling method and use of 286

Four, reading procedures and steps and matters needing attention 292

Five, complex circuit analysis methods and skills 295

In the second quarter, general residential electrical wiring 297

A, distribution system diagram reading 299

Second, the plan reading 302

Three, weak current system diagram reading 307

Four, lightning protection system diagram reading 3 10

In the third quarter, the electrical circuit of the small boiler room is 3 1 1.

I. Electrical system diagram reading 3 1 1

Second, the power plan reading 3 15

Three. Read the lighting plan 3 17

Chapter 10 Electrical Safety Technology 3 19

The first section electrician operation and operating procedures and requirements 3 19

In the second quarter electrician safety precautions 322

Reference 339