Electrician maintenance industry development prospect,Electrician electronic basic knowledge
The purpose of the senior maintenance electrician vocational qualification examination is to test whether students have the basic knowledge to engage in the installation, commissioning and maintenance of mechanical equipment, electrical system wiring and devices, etc., repair work, so that before students enter the workplace, familiar with the job, to better meet the special requirements of the employer for employees.
The general composition of the circuit and the development trend; the basic laws of physical quantities commonly used in the circuit; resistive series and mixed circuits; single-phase, three-phase AC circuits; three-phase symmetrical load star (Y-shaped) connection characteristics and applications; three-phase asymmetrical load star (Y-shaped) connection characteristics and applications; three-phase load triangle (△-shaped) connection characteristics and applications; resistors, capacitors, inductors, diodes, transistors, field-effect tubes IGBT, thyristor, operational amplifier, integrated circuit, opto-coupler and other components performance parameters typical application of common fault substitution and detection techniques, etc.
Basic skills training
The use of various electrical tools; multimeter, insulation resistance meter, clamp-on ammeter and other instruments and meters; single-strand and multi-strand wire linear and T-shaped connection; more than three strands of wire, soft and hard wire connection; soft wire knotting method; steel pipe, PVC pipe, line channel wiring; open laying, concealed laying, lighting and power wiring process; distribution panel cabinet wiring process.
Professional knowledge and skills training
Lighting line installation and maintenance; single-control line, two-site dual-control line, lighting project line (such as a family line design, installation, maintenance, etc.); single-phase, three-phase three-wire, three-phase four-wire energy meter selection and installation of direct access and access via mutual transformer installation and testing; three-phase power transformer, autotransformer, small transformer, isolation transformer, voltage and current transformer principle testing and correct use; single-phase Three-phase asynchronous motor principle and detection; single-phase asynchronous motor type and forward and reverse control; lighting, power distribution cabinet installation, commissioning, maintenance technology; pointing, self-locking start, pointing and self-locking mixed control line; contactor interlock forward and reverse control line; button contactor double interlock forward and reverse control line; two-site start-stop control line; automatic cycle reciprocating control line; button control and time relay Installation, commissioning and maintenance skills of automatic control Y-△ voltage reduction starting control line.
Skill enhancement and characteristics
TT, TN (TN-C TN-S TN-C-S), IT three low-voltage distribution system meaning and characteristics and the basic outline of the working ground (DE) and protective ground (PE); various electrical materials, wire cross-section, low-voltage electrical selection technology; electrical system diagram, plan, layout, wiring diagram reading technology; various electronic components performance application and testing; common sensors of the automatic control system ( Such as thermal, photosensitive, pressure sensitive, Hall element, reed switch and other sensors composed of temperature, light, flow, pressure, liquid level, etc.) of the use of detection technology; full-bridge rectifier filter regulator circuit (AC to DC) installation, commissioning, maintenance; inverter power supply (DC to AC) basic principles, switching power supply principles and testing.
Employment Direction
Maintenance electricians can be engaged in maintenance electricians, motor repairers, electronic assemblers, power generation and distribution, relay protection, factory electricity, CNC maintenance, home appliance maintenance and other work.
The scope of employment is very broad. The scope of work of electricians (except industrial electric power system) includes: layout, assembly, installation, debugging, fault detection and troubleshooting.
as well as repairing electrical wiring, fixtures, controls, and related equipment in buildings and other buildings.
Although the average annual income of electricians is relatively high, the number of employees is not too large to meet the needs of employers. This situation is expected to continue in the next five years.
The employment outlook for maintenance electricians is very broad in terms of employment prospects.
The main jobs are in maintenance electricians, motor repairers, electronic assemblers, power generation and distribution, relay protection, factory electricity, CNC maintenance, etc.
The demand for a large number of electricians makes the employment prospect of maintenance electricians very broad.
