MindMap Gallery Electrical Engineering Technology
Yijian Mechanical and Electrical Engineering Installation Technology Test Points shared the knowledge of industrial electrical: distribution device installation and debugging technology, transformer installation and debugging technology, motor installation and debugging, transmission and distribution line construction technology, and installation requirements for lightning protection grounding devices. .
Edited at 2023-07-08 18:38:18This Valentine's Day brand marketing handbook provides businesses with five practical models, covering everything from creating offline experiences to driving online engagement. Whether you're a shopping mall, restaurant, or online brand, you'll find a suitable strategy: each model includes clear objectives and industry-specific guidelines, helping brands transform traffic into real sales and lasting emotional connections during this romantic season.
This Valentine's Day map illustrates love through 30 romantic possibilities, from the vintage charm of "handwritten love letters" to the urban landscape of "rooftop sunsets," from the tactile experience of a "pottery workshop" to the leisurely moments of "wine tasting at a vineyard"—offering a unique sense of occasion for every couple. Whether it's cozy, experiential, or luxurious, love always finds the most fitting expression. May you all find the perfect atmosphere for your love story.
The ice hockey schedule for the Milano Cortina 2026 Winter Olympics, featuring preliminary rounds, quarterfinals, and medal matches for both men's and women's tournaments from February 5–22. All game times are listed in Eastern Standard Time (EST).
This Valentine's Day brand marketing handbook provides businesses with five practical models, covering everything from creating offline experiences to driving online engagement. Whether you're a shopping mall, restaurant, or online brand, you'll find a suitable strategy: each model includes clear objectives and industry-specific guidelines, helping brands transform traffic into real sales and lasting emotional connections during this romantic season.
This Valentine's Day map illustrates love through 30 romantic possibilities, from the vintage charm of "handwritten love letters" to the urban landscape of "rooftop sunsets," from the tactile experience of a "pottery workshop" to the leisurely moments of "wine tasting at a vineyard"—offering a unique sense of occasion for every couple. Whether it's cozy, experiential, or luxurious, love always finds the most fitting expression. May you all find the perfect atmosphere for your love story.
The ice hockey schedule for the Milano Cortina 2026 Winter Olympics, featuring preliminary rounds, quarterfinals, and medal matches for both men's and women's tournaments from February 5–22. All game times are listed in Eastern Standard Time (EST).
central theme
Electrical Engineering Technology
Industrial electrical
Power distribution device installation and debugging technology
Installation requirements for cabinets of power distribution devices
Testing and adjustment requirements for power distribution devices
Main setting contents of power distribution device
Three-phase one-time reclosing setting
Overload alarm setting
Overcurrent protection setting
Overvoltage protection setting
Zero sequence overcurrent protection setting
Acceptance of power transmission operation of power distribution device
Transformer installation and debugging technology
Transformer secondary transportation
Transformer lifting core inspection
Transformer in place
Transformer wiring
Transformer handover test
Insulating oil test or sulfur hexafluoride gas test
Measure the DC resistance of the winding together with the bushing
Check the voltage ratio of all taps
Check the three-phase wiring group of the transformer
Measure the junction resistance of the iron core and clamps
Measure the insulation resistance and absorption ratio of the winding and bushing
AC withstand voltage test of windings and bushings
Impact closing test at rated voltage
Check phase
Power transmission trial operation
Motor installation and debugging
Inspection before motor installation
Core pulling inspection
Drying of electric motors
Drying method
External heating drying method
Current heating drying method
Drying precautions
Motor installation
Motor wiring
Star connection
Delta connection
Motor test run
Inspection before trial operation
Inspections during trial operation
Construction Technology of Transmission and Distribution Lines
Overhead line construction procedures
Wire connection requirements
Line test
Directly buried cable laying requirements
Requirements for laying pipe cables
Requirements for cable laying in cable trenches or tunnels
General requirements for cable laying
Installation requirements for lightning protection grounding devices
Lightning protection measures
Transmission lines of different voltage levels, set up on lightning connection lines
Lightning protection measures for power plants and substations
Substations usually use valve-type air-termination devices
Power plants use metal oxide air terminals
Air-termination test
Measuring the insulation resistance of air terminals
Measure the leakage current of the air-termination device, the AC conductivity current of the magnetic air-termination device, and the continuous current of the metal oxide air-termination device.
Measure the power frequency reference voltage or DC reference voltage of the metal oxide air-termination device, and measure the power-frequency discharge voltage of the FS type valve air-termination device.
Metal ground electrode material
Grounding Requirements for Explosion and Fire Hazardous Atmospheres
In an environment with explosive gases
In an environment with explosive dust
In a fire-hazardous environment
Requirements for anti-static grounding devices