It is understood that at present, China's "Regulations on the Protection of Electric Power Facilities" only stipulates the protection zones for overhead power lines. The design of substations has not yet met the requirements of environmental protection technology, and the construction of substations has not been incorporated into the unified planning of urban construction. With the increasing number of complaints from the people about the substation, the relevant state departments have not yet had an "authoritative statement." To this end, the Shanghai Environmental Protection Bureau organized the "Shanghai Substation Environmental Protection Design Code Study" this year to take the lead in formulating a set of substation construction and surrounding environmental protection design specifications and "local standards" of related technologies to make the substation's environmental design There are laws to follow and construction.
Experts suggest that substation construction should be synchronized with urban development, regional development planning, residential community development planning should be included in substation construction projects, and environmental impact assessment of construction projects; in residential development projects, in principle, substations should be built in advance; Urban, urban, and populated residential areas do not develop above-ground substations of 500 kV and above. Separate self-cooling transformers should be used for substations of 35 kV and above; encourage substation to be located in large green spaces, or develop Underground substations; substations generally maintain an appropriate distance from residential buildings or other environmentally sensitive targets, 220 kV for 20 kV, 15 m for 110 kV, 15 m for 35 kV, and 8 m for 10 kV.
In addition, in the design specifications of substation construction, experts also put forward a number of specific measures, such as the construction of substations in villages, towns, and population-populated residential areas, all using underground cables, the radiators are cooled by natural ventilation, and the walls of substations are used. Reinforced structure with good grounding, etc.
At present, the Shanghai Environmental Protection Bureau has submitted the research report “Shanghai Substation Environmental Protection Design Specification†(draft) to the Shanghai Construction Engineering Standards Quota Management Station, and proposes to add it to the “2005 Shanghai Construction Standardsâ€. Prepare the plan." It is reported that due to the vital interests of the general public, the "Specifications" will be widely heard by experts and the public before the official promulgation. After the "Regulations" was officially promulgated, the Shanghai Environmental Protection Bureau will make science and education films to promote popular science to the general public and guide people to correctly treat electromagnetic radiation.
The authenticity of this information has not been confirmed by the international electrical network, for your reference only.
Permanent magnet Dc Motor is composed of stator magnetic pole, rotor, brush, case and so on. Stator magnetic pole is made of permanent magnet (permanent magnet steel), ferrite, alnico, ndfeb and other materials, and the rotor is generally made of silicon steel laminated. Enameled wire is wound between two slots in the rotor core (three slots are provided with three windings), and its joints are separately welded on the metal sheet of the commutator. Electric brush is a conductive part connecting power supply and rotor winding. Permanent magnet motor brush USES single metal sheet or metallic graphite brush, electrochemical graphite brush.Permanent magnet Gear Motor is established using permanent magnet magnetic field of a dc motor. Permanent magnet gear motor is widely used in various kinds of portable electronic equipment or apparatus
precision instruments and meters,automobile industry, medical equipment, consumer electronics, household appliances, electric glass doors and Windows,etc., wide application range,,Permanent Magnet Gear Motor is usually used in small power occasion.
Features: permanent
magnet gear motor is a kind of rectangular pulse wave, sine wave current, in the form of hybrid permanent magnet motor. Simple structure, high reliability and high efficiency.
Method of use: the best stable in horizontal plane, installed on the permanent magnet gear motor output shaft parts, cannot use a hammer to knock,knock prone to press into the permanent magnet gear motor drive, may cause damage to internal components, and cannot be used in the case of blocked.
Operating temperature range:
permanent magnet gear motor should be used at a temperature of -10~60℃.
The figures stated in the catalog specifications are based on use at ordinary room temperature catalog specifications re based on use at ordinary room temperature (approximately20~25℃.
If a geared motor is used outside the prescribed temperature range,the grease on the gearhead area will become unable to function normally and the motor will become unable to start.Depending on the temperature conditions ,it may be possible to deal with them by changing the grease of the motor's parts.Please feel free to consult with us about this.
Storage temperature range:
permanent magnet gear motor should be stored ta a temperature of -15~65℃.
In case of storage outside this range,the grease on the gearhead area will become unable to function normally and the motor will become unable to start.
Service life:
The longevity of permanent magnet gear motor is greatly affected by the load conditions , the mode of operation,the environment of use ,etc.Therefore,it is necessary to check the conditions under which the product will actually be used .The following conditions will have a negative effect on longevity.Please consult with us should any of them apply.
â—Use with a load that exceeds the rated torque
â—Frequent starting
â—Momentary reversals of turning direction
â—Impact loads
â—Long-term continuous operation
â—Forced turning using the output shaft
â—Use in which the permitted overhang load or the permitted thrust load is exceeded
â—A pulse drive ,e.g.,a short break,counter electromotive force,PWM control
â—Use of a voltage that is nonstandard as regards the rated voltage
â—Use outside the prescribed temperature or relative-humidity range,or in a special environment.
â—Please consult with us about these or any other conditions of use that may apply,so that we can be sure that you select the most appropriate model.
when it come to volume production,we're a major player as well .each month,we rurn out 600000 units,all of which are compliant with the rohs directive.Have any questions or special needed, please contact us, we have the engineer group and best sales department to service to you Looking forward to your inquiry. Welcome to our factory.
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Shenzhen Shunchang Motor Co., LTD. , https://www.scgearmotor.com