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The power distribution system is the general name of the substation and power distribution system。Simply，The substation is to turn the voltage introduced outside into a voltage suitable for you，The power distribution is to allocate electricity to the use of the inside of your unit。Of course, the substation can achieve both functions.。
The function of the transformer system is to increase or decrease the primary side voltage through the transformer.，Then output from the secondary side。The voltage is raised to reduce losses during long-distance transmission of electrical energy.，Like500KVHigh voltage transmission, etc.。The voltage is reduced to the use of the corresponding voltage level load at the client。As civilian220V，Commonly used in industry380v,660V,690V,1000V，6KV，10KVEtc.。The core component of the substation system is a transformer with various voltage ratios.，In short, the system with voltage changes is a substation system，The power distribution room with a transformer can also be called a substation（Stand），Or commonly known as the power distribution room。As for the power distribution system, its easy to understand，If there is no change in voltage in a power system，Its the power distribution system。The core components of the power distribution system are switches of various current levels。Divided from a large branch into several small branches，Several small switches are connected under a large switch，Allocate multiple loads for use or more branches。
The power system has traditionally been divided into power generation、Three major components of power transmission and distribution。 The power generated by the power generation system is transmitted through the power transmission system，Finally, the distribution system is assigned to each user。 Generally，Transfer power system from a power supply system to a power supply substation（High voltage distribution substation）This system exported to the user side is called the power distribution system。
The distribution system consists of a variety of distribution equipment（Or component）A power network system consisting of a power distribution facility that converts voltage and directly distributes power to end users。Transfer power system from a power supply system to a power supply substation（High voltage distribution substation）This system exported to the user side is called the power distribution system。The distribution system consists of a variety of distribution equipment（Or component）A power network system consisting of a power distribution facility that converts voltage and directly distributes power to end users。
Since the distribution system is the last link of the power system, it is directly aimed at the end user，Whether it is perfect or not is directly related to the power reliability and power quality of the majority of users，Therefore, it has an important position in the power system。
Lighting engineering refers、Discipline of technology and engineering。The lighting requirements mainly include the illumination of the illuminated surface、Brightness、Color rendering and visual effects of light environment, etc.。The lighting environment includes indoor spaces and roads、Square、Scenic area、Garden、Outdoor spaces such as buildings。
Lighting engineering work procedures are generally：Lighting engineer designs through lighting，Technicians carry out lighting project installation、Debug、Acceptance and other activities。 Lighting engineering has existing functions and lighting functions，It has the effect of beautifying the urban environment。With the development of social science and technology，LEDThe application of lamps in lighting projects is becoming more and more popular。Its energy saving、High brightness、Rich in color、High controllability and other characteristics makeLEDIt has been widely used in lighting engineering。
Lighting projects include road lighting、City night lighting、Indoor lighting、Building lighting and other projects。
Pipe refers to pipes、Pipe coupling parts and valves are connected to convey gases、Device for liquid or fluid with solid particles。Generally，Fluid passing blower、Compressor、After the pump and boiler are supercharged，Flow from the high pressure of the pipeline to the low pressure，It can also be used to deliver the pressure or gravity of the fluid itself。Pipes are widely used，Mainly used for water supply、Drain、Heating、Gas supply、Long-distance oil and gas transport、Agricultural irrigation、In hydraulic engineering and various industrial installations。
Classified by conveying medium：Water supply and drainage pipes、Compressed air duct、Hydrogen pipeline、Oxygen pipeline、Acetylene pipe、Thermal duct、Gas pipeline、Fuel pipe、Poisonous fluid pipeline、Toxic fluid ducts、Acid and alkali pipe、Boiler pipe、Refrigeration pipes、Purification of pure gas pipelines、Pure water pipes。
Water supply and drainage system is for peoples lives、Production、General name for municipal and fire protection facilities for water and wastewater removal。
Water supply and drainage systems are an essential and important part of any building。The water supply and drainage system of general buildings includes domestic water supply system、Domestic drainage systems and fire protection systems，These systems are important monitoring objects for building automation systems。
Due to fire water system and fire automatic alarm system、Fire automatic fire extinguishing system close，National technical specifications stipulate that fire water supply should be controlled and managed by the fire protection system.，Therefore，The fire water supply system is controlled by the fire linkage control system。
Electrical equipment has been widely used in production，Electrical failures are inevitable，How to troubleshoot electrical faults is a major problem。Electrical maintenance personnel are the main technical force in facing and solving this prominent problem，In actual production applications, we can accurately find the fault location，It is the obligation and responsibility of every maintenance worker to eliminate faults and enable the electrical equipment to operate normally and stably。
Electrical maintenance refers to the use of professional instruments to apply electrical equipment.，Including generator、Transformer、Power lines、Professional maintenance of circuit breakers and other equipment。
Electrical maintenance scope includes：Voltage current and frequency、Harmonic、Power and electricity、Voltage surge and sudden drop and transient、Three phase imbalance。
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