The notice requires that the application of the solar water heating system should be synchronized with the building as a whole, synchronous construction, simultaneous acceptance, simultaneous delivery and maintenance management. To this end, relevant departments of various localities should strengthen the engineering application management and quality control of solar water heating systems from five aspects. First, strict solar water heating system and building integration design and review; second, establish a solar water heating system product promotion certification release system; third, the provincial construction department to establish solar water heating system engineering design, construction and installation, supervision personnel pre-job training system The installation personnel of solar energy production enterprises or construction units must be qualified for professional and technical training before they can engage in solar water heating system engineering installation and construction; fourth, strengthen solar water heating system engineering quality management; fifth, strengthen solar water heating system Maintenance, maintenance and management. When the construction unit or the owner, the owners' committee and the property service enterprise sign the property service contract, they shall make corresponding agreements on the maintenance of the solar water heating system, and clarify the responsibilities and rights and obligations of all parties.
Semiconductor Fuse and Ferrite
Fuse refers to an electric appliance that, when the current exceeds the specified value, melts the fuse and disconnects the circuit with the heat generated by itself.When the current exceeds the specified value for a period of time, the fuse melts and disconnects the circuit with the heat generated by the fuse itself.A current protector made from this principle.The fuse is widely used in high and low voltage power distribution system and control system as well as power equipment.
Ferrite is a metal oxide with ferrous magnetism.As far as electrical properties are concerned, the resistivity of ferrite is much larger than that of single metal or alloy magnetic materials, and it has higher dielectric properties.Ferrite magnetic energy also shows high permeability at high frequencies.As a result, ferrite has become a non-metallic magnetic material widely used in the field of high frequency and weak current.Due to the low ferrite magnetic energy stored in the unit volume, saturated magnetic induction strength (Bs) and low (usually only pure iron 1/3 ~ 1/5), and thus limits its higher requirements in the low-frequency magnetic energy density in the field of high voltage and high power applications.
Semiconductor Fuse, Fuse Cutout, Protection Fuse, Square Fuse, Fuse Link, Ceramic Fuse, Fuse Box, Fuse Resistors
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