CN108964015A - A method of it is designed with electrical engineering height for low meter - Google Patents
A method of it is designed with electrical engineering height for low meter Download PDFInfo
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- CN108964015A CN108964015A CN201810547906.3A CN201810547906A CN108964015A CN 108964015 A CN108964015 A CN 108964015A CN 201810547906 A CN201810547906 A CN 201810547906A CN 108964015 A CN108964015 A CN 108964015A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/16—Earthing arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/28—Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/54—Anti-seismic devices or installations
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/56—Cooling; Ventilation
- H02B1/565—Cooling; Ventilation for cabinets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B7/00—Enclosed substations, e.g. compact substations
- H02B7/06—Distribution substations, e.g. for urban network
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a kind of with electrical engineering height for the method for low meter design, comprising the following steps: S1, power distribution station addressing: site is selected in close to load center, using building coordinate system；S2 power distribution station is built: power distribution station construction area builds transformer room and low-voltage distribution room in 45 ㎡ or more respectively；S3, by 0.4kv switchgear, low pressure, always breaking cabinet, low-pressure line-outgoing cabinet and reactive-load compensation capacitor cabinet are mounted in 0.4kv low-voltage distribution room；S4,10kV high voltage load switch is mounted in transformer room's inner wall surface.Unification is carried out by the specification to low-voltage distribution equipment, transformer, high voltage load switch, fuse and earthing or grounding means in the present invention; electrical equipment can be ordered in advance when building 10kv transformer and distribution power station; reduce site operation period and the workload of personnel; by gravity flow functional in organized water drainage, inhibition, the setting modes such as axial flow blower, the problems such as effectively improving power distribution station presently, there are draining, fire-fighting, ventilation, environmental protections.
Description
Technical field
The present invention relates to electric power project engineering field more particularly to a kind of methods designed with electrical engineering height for low meter.
Background technique
Due to the difference of Regional Economic development, 10kV and the above transformer and distribution power station construction scale and mode respectively have not
Together, the specification disunity of low-voltage distribution equipment, transformer, high voltage load switch, fuse and earthing or grounding means, construction mode
It is after dispersion transports various electrical equipments to scene, then to carry out installation and debugging respectively, so that the site operation period is longer, work
It measures larger, builds the process of transformer and distribution power station without plan, draining, fire-fighting, ventilation, environmental protection there is a problem of larger.Therefore,
We have proposed a kind of methods with electrical engineering height for low meter design to be used to solve the above problems.
Summary of the invention
The purpose of the present invention is to solve exist in the prior art the longer site operation period, larger workload, draining,
There is the shortcomings that larger in fire-fighting, ventilation, environmental protection, and a kind of side with electrical engineering height for low meter design proposed
Method.
A method of it is designed with electrical engineering height for low meter, comprising the following steps:
S1, power distribution station addressing: site is selected in the place for meeting radius of low voltage power supply requirement close to load center, and site is pressed
Positive direction arrangement, using building coordinate system, site is non-heating zone；
S2, power distribution station are built: power distribution station construction area has group using gravity flow in 45 ㎡ or more, the drainage pattern of power distribution station
Draining is knitted, sump Accumulated Rainwater is set, fire protection uses inhibition mode, and draft type uses natural air inlet, nature
Air draft, and it is provided with axial flow blower, the lighting lamp for work inside power distribution station uses fluorescent lamp, and emergency lighting lamp uses emergency light,
Transformer room's building size is 6 × 6 × 5m, and low-voltage distribution room building size is 7 × 6 × 6 meters, and the outside of outdoor high-tension cable is worn
There is the laying of electric power special PVC-C protection pipe, outdoor house cable is all embedded at the 1m of underground, and the outside of cable is built with cable shaft,
The depth of cable shaft is 1.5m, and surrounding is built with guardrail, and cable shaft meets the requirement of cable minimum bending radius；
S3, by 0.4kv switchgear, low pressure, always breaking cabinet, low-pressure line-outgoing cabinet and reactive-load compensation capacitor cabinet are mounted on
In 0.4kv low-voltage distribution room, switchgear is installed using drawer type, and the material of bus is copper busbar, 0.4kV low-voltage distribution dress in cabinet
It sets using single-row arrangement, the total cabinet breaker of low pressure uses breaker of plastic casing, and 6 tunnel plastic housings open circuits are configured in low-pressure line-outgoing cabinet
Device, reactive-load compensation capacitor cabinet use automatic compensating formula；
S4,10kV high voltage load switch is mounted in transformer room's inner wall surface, oil-immersed transformer is arranged in independent
In transformer room, and transformer is installed and is blocked；
S5, transformer is mounted in transformer room, selects high-efficiency and energy-saving type zero-load voltage-variable transformer, energy saving rank is
S11 type, single transformer capacity are 400kVA, and the voltagerating no-load voltage ratio of transformer is 10.5 ± 2 × 2.5%/0.4kV, transformation
The impedance voltage of device is Uk=4%, and the type of cooling is cooling using self-cooled；
S6,10kV fuse switch is mounted on the outdoor inside power distribution station, rated short circuit drop-out current is greater than
12.5kA。
S7, conductor installation: 10kV inlet wire cable uses the conducting wire of the specification of YJV22-8.7/15-3 × 70, and 10kV bus uses
The conducting wire of the specification of TMY-40 × 4, low-voltage bus bar use copper busbar, and bus maximum operating currenbt is set as transformer rated current
1.3 times, long cable section of ingoing line is led into indoor high-voltage side wall load switch when installation；
S8, earthing or grounding means is installed in transformer and distribution power station bottom, earthing or grounding means is formed using horizontal grounding objects and Grounding Grids,
Grounding body is embedded at the 2m of underground, then uses 50 × 5mm hot galvanizing flat all electrical appliance enclosures, cable bearer, built-in fitting
Steel is reliably connected with grounded screen, by ground link and basic channel steel firm welding, ground line and earthing pole firm welding, and weld
It is brushed with preservative.
Preferably, the site sets Site Design as same absolute altitude, and transformer and distribution power station indoor terrace is higher than grade
0.3m or more, when area's earthquake motion peak acceleration of standing is 0.1g, geological process is 7 degree of seismic fortification intensities, design wind speed 30m/
S, characteristic value of foundation bearing capacity 150kPa, foundation soil and underground water to steel, the corrosion-free effect of concrete, height above sea level 1000m with
Under, long term ambient temperature -25~between 40 DEG C, most hot monthly mean of daily maximum temperature is lower than 35 DEG C, gradation for surface pollution III level with
It is interior, intensity of sunshine 0.1W/cm2.
Preferably, the primary building material of the selection is concrete: C25, C30 are for general cast-in-place or precast reinforced mixed
Xtah Crude Clay structure and basis, C15 are used for concrete cushion, reinforcing bar: HPB235 grades, HRB335 grades, HRB400 grades, steel: Q235,
Q345, bolt: 4.8,6.8,8.8 grades.
Preferably, the classification of providing fortification against earthquakes of the building of the power distribution station by GB5011-2010, " advise by Seismic Design of Building
Model " and GB50260-2013 " code for design of seismic of electrical installations " design, security level is second level, and coefficient for importance of structure is
1.0, key construction, basis all use frame and brick mix structure, and building uses strip footing.
Preferably, the low voltage power capacitor uses self healing capacitor, and the parameter of power capacitor is that overcurrent is big
In 1.3In, surge current is greater than 200In, and reactive compensation capacity is 30% compensation of transformer capacity.
Preferably, the high voltage side of transformer is equipped with Zinc-Oxide Arrester, and area with more lightning activities low-pressure side is equipped with zinc oxide and keeps away
Thunder device.
Preferably, the horizontal grounding objects are made of the Hot-dip zinc-coated flat steel sheet of 50 × 5mm, Grounding Grids by 50 × 5 ×
The hot galvanizing angle steel of 2500mm forms, and grounded screen builds up rear personnel and carries out surveying total grounding resistance, grounded screen electric resistance is adjusted
To 2 Ω.
The beneficial effects of the present invention are: by low-voltage distribution equipment, transformer, high voltage load switch, molten in the present invention
The specification of disconnected device and earthing or grounding means carries out unification, can order electrical equipment in advance when building 10kv transformer and distribution power station, reduce
The workload in site operation period and personnel passes through the sides such as gravity flow functional in organized water drainage, inhibition, setting axial flow blower
Formula, the problems such as effectively improving power distribution station presently, there are draining, fire-fighting, ventilation, environmental protections.
Specific embodiment
Combined with specific embodiments below the present invention is made further to explain.
In the present embodiment
A method of it is designed with electrical engineering height for low meter, comprising the following steps:
S1, power distribution station addressing: site is selected in the place for meeting radius of low voltage power supply requirement close to load center, and site is pressed
Positive direction arrangement, using building coordinate system, site is non-heating zone, and site sets Site Design as same absolute altitude, transformer and distribution power station
Indoor terrace is higher than grade 0.3m or more, and when area's earthquake motion peak acceleration of standing is 0.1g, geological process is 7 degree of antidetonations
Fortification intensity, design wind speed 30m/s, characteristic value of foundation bearing capacity 150kPa, foundation soil and underground water are to steel, concrete without corruption
Erosion effect, height above sea level in 1000m hereinafter, long term ambient temperature -25~between 40 DEG C, most hot monthly mean of daily maximum temperature is lower than 35
DEG C, gradation for surface pollution is within III level, intensity of sunshine 0.1W/cm2；
S2, power distribution station are built: power distribution station construction area has group using gravity flow in 45 ㎡ or more, the drainage pattern of power distribution station
Draining is knitted, sump Accumulated Rainwater is set, then water is drained into city nearby in a organized way by the closed drain through underground setting to Jiao Jing
In political affairs Storm Sewer Network, fire protection uses inhibition mode, and draft type uses natural air inlet, natural exhaust, and is provided with
Axial flow blower, the lighting lamp for work inside power distribution station use fluorescent lamp, and emergency lighting lamp uses emergency light, transformer room's architect's scale
Very little is 6 × 6 × 5m, and low-voltage distribution room building size is 7 × 6 × 6 meters, and it is dedicated that the outside of outdoor high-tension cable is installed with electric power
The laying of PVC-C protection pipe, outdoor house cable are all embedded at the 1m of underground, and the outside of cable is built with cable shaft, the depth of cable shaft
Degree is 1.5m, and surrounding is built with guardrail, and cable shaft meets the requirement of cable minimum bending radius, the main Building wood of selection
Material is concrete: C25, C30 are used for general cast-in-place or prefabricated reinforced concrete structure and basis, and C15 is used for concrete cushion, steel
Muscle: HPB235 grades, HRB335 grades, HRB400 grades, steel: Q235, Q345, bolt: 4.8,6.8,8.8 grade, the building of power distribution station
By GB5011-2010 " seismic design provision in building code " and GB50260-2013, " electric power facility antidetonation is set the classification of providing fortification against earthquakes of object
Meter specification " design, security level is second level, and coefficient for importance of structure 1.0, key construction, basis all use frame and brick
Mixed structure, building use strip footing；
S3, by 0.4kv switchgear, low pressure, always breaking cabinet, low-pressure line-outgoing cabinet and reactive-load compensation capacitor cabinet are mounted on
In 0.4kv low-voltage distribution room, switchgear is installed using drawer type, and the material of bus is copper busbar, 0.4kV low-voltage distribution dress in cabinet
It sets using single-row arrangement, the total cabinet breaker of low pressure uses breaker of plastic casing, and 6 tunnel plastic housings open circuits are configured in low-pressure line-outgoing cabinet
Device, reactive-load compensation capacitor cabinet use automatic compensating formula, and compensation way uses three-phase compensation, have harmonic restraining function, low
Piezoelectric forces capacitor uses self healing capacitor, has the function of non-maintaining, pollution-free, environmentally friendly etc., and the parameter of power capacitor is
Overcurrent is greater than 1.3In, and surge current is greater than 200In, and reactive compensation capacity is 30% compensation of transformer capacity, guarantees electricity consumption
Power factor (PF) reaches 0.95 or more when peak；
S4,10kV high voltage load switch is mounted in transformer room's inner wall surface, oil-immersed transformer is arranged in independent
In transformer room, and transformer is installed and is blocked；
S5, transformer is mounted in transformer room, selects high-efficiency and energy-saving type zero-load voltage-variable transformer, energy saving rank is
S11 type, single transformer capacity are 400kVA, and the voltagerating no-load voltage ratio of transformer is 10.5 ± 2 × 2.5%/0.4kV, transformation
The impedance voltage of device is Uk=4%, and the type of cooling is cooling using self-cooled, and it is lightning-arrest that high voltage side of transformer is equipped with zinc oxide
Device, area with more lightning activities low-pressure side are equipped with Zinc-Oxide Arrester, can prevent power distribution equipment from attacking by direct lightning strike；
S6,10kV fuse switch is mounted on the outdoor inside power distribution station, rated short circuit drop-out current is greater than
12.5kA。
S7, conductor installation: 10kV inlet wire cable uses the conducting wire of the specification of YJV22-8.7/15-3 × 70, and 10kV bus uses
The conducting wire of the specification of TMY-40 × 4, low-voltage bus bar use copper busbar, and bus maximum operating currenbt is set as transformer rated current
1.3 times, long cable section of ingoing line is led into indoor high-voltage side wall load switch when installation；
S8, earthing or grounding means is installed in transformer and distribution power station bottom, earthing or grounding means is formed using horizontal grounding objects and Grounding Grids,
Horizontal grounding objects are made of the Hot-dip zinc-coated flat steel sheet of 50 × 5mm, Grounding Grids by 50 × 5 × 2500mm hot galvanizing angle steel group
At grounded screen builds up rear personnel and carries out surveying total grounding resistance, grounded screen electric resistance is adjusted to 2 Ω, grounding body is embedded in underground
At 2m, then use 50 × 5mm Hot-dip zinc-coated flat steel sheet and grounded screen reliable all electrical appliance enclosures, cable bearer, built-in fitting
Connection, by ground link and basic channel steel firm welding, ground line and earthing pole firm welding, weld are brushed with preservative.
The following are certain 10kv transformer and distribution power stations compared between the present invention:
| Certain 10kv substation | The present invention | Substation's disadvantage | |
| Transformer | S13-M-315/10 type | S11-M-400/10 type | Capacity is small, noise is big |
| Drainage system | Cable ditch water discharge | Gravity flow draining | Drainage effect is poor |
| Capacitor | Ordinary capacitor | Self healing capacitor | Not environmentally, it needs to be regularly maintained |
| Earthing or grounding means | Weld is unshielded | Weld is brushed with preservative | It is grounded insecure, perishable |
In conclusion electrical equipment model selection of the present invention is rationally advantageous, and in transformer and distribution power station draining, fire-fighting, peace
Consider relatively comprehensively, to ensure its build guality while guaranteeing that transformer and distribution power station construction period is small in the details such as dress.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (7)
1. a kind of method designed with electrical engineering height for low meter, which comprises the following steps:
S1, power distribution station addressing: site is selected in the place for meeting radius of low voltage power supply requirement close to load center, and site is by pros
To arrangement, using building coordinate system, site is non-heating zone；
S2, power distribution station are built: power distribution station construction area is arranged in 45 ㎡ or more, the drainage pattern of power distribution station using gravity flow in a organized way
Sump Accumulated Rainwater is arranged in water, and fire protection uses inhibition mode, and draft type uses natural air inlet, natural exhaust,
And it is provided with axial flow blower, the lighting lamp for work inside power distribution station uses fluorescent lamp, and emergency lighting lamp uses emergency light, builds respectively
Transformer room and low-voltage distribution room are made, transformer room's building size is 6 × 6 × 5m, and low-voltage distribution room building size is 7 × 6
× 6 meters, the outside of outdoor high-tension cable is installed with the laying of electric power special PVC-C protection pipe, and outdoor house cable is all embedded in underground 1m
Place, the outside of cable are built with cable shaft, and the depth of cable shaft is 1.5m, and surrounding is built with guardrail, and cable shaft meets cable
The requirement of minimum bending radius；
S3, by 0.4kv switchgear, low pressure, always to be mounted on 0.4kv low for breaking cabinet, low-pressure line-outgoing cabinet and reactive-load compensation capacitor cabinet
Press-fitting electricity is indoor, and switchgear is installed using drawer type, and the material of bus is copper busbar in cabinet, and 0.4kV low-voltage distribution equipment uses
Single-row arrangement, the total cabinet breaker of low pressure use breaker of plastic casing, are configured with 6 road breaker of plastic casing, nothing in low-pressure line-outgoing cabinet
Function compensation capacitor cabinet uses automatic compensating formula；
S4,10kV high voltage load switch is mounted in transformer room's inner wall surface, oil-immersed transformer is arranged in independent transformation
In device room, and transformer is installed and is blocked；
S5, transformer is mounted in transformer room, selects high-efficiency and energy-saving type zero-load voltage-variable transformer, model S11-M-400/
10, single transformer capacity is 400kVA, and the voltagerating no-load voltage ratio of transformer is 10.5 ± 2 × 2.5%/0.4kV, transformer
Impedance voltage is Uk=4%, and the type of cooling is cooling using self-cooled；
S6,10kV fuse switch is mounted on to the outdoor inside power distribution station, rated short circuit drop-out current is greater than 12.5kA.
S7, conductor installation: 10kV inlet wire cable uses the conducting wire of the specification of YJV22-8.7/15-3 × 70, and 10kV bus uses TMY-
The conducting wire of 40 × 4 specifications, low-voltage bus bar use copper busbar, and bus maximum operating currenbt is set as the 1.3 of transformer rated current
Again, long cable section of ingoing line is led into indoor high-voltage side wall load switch when installation；
S8, earthing or grounding means is installed in transformer and distribution power station bottom, earthing or grounding means is formed using horizontal grounding objects and Grounding Grids, ground connection
Body is embedded at the 2m of underground, then by all electrical appliance enclosures, cable bearer, built-in fitting use 50 × 5mm Hot-dip zinc-coated flat steel sheet with
Grounded screen is reliably connected, and by ground link and basic channel steel firm welding, ground line and earthing pole firm welding, weld are brushed
There is preservative.
2. a kind of method designed with electrical engineering height for low meter according to claim 1, which is characterized in that the site is set
Determining Site Design is same absolute altitude, and transformer and distribution power station indoor terrace is higher than grade 0.3m or more, and area's earthquake motion peak value of standing accelerates
When degree is 0.1g, geological process is 7 degree of seismic fortification intensities, design wind speed 30m/s, characteristic value of foundation bearing capacity 150kPa, ground
Base soil and underground water to steel, the corrosion-free effect of concrete, height above sea level in 1000m hereinafter, long term ambient temperature -25~to 40 DEG C
Between, most hot monthly mean of daily maximum temperature is lower than 35 DEG C, and gradation for surface pollution is within III level, intensity of sunshine 0.1W/cm2.
3. a kind of method designed with electrical engineering height for low meter according to claim 1, which is characterized in that the selection
Primary building material is concrete: C25, C30 are used for general cast-in-place or prefabricated reinforced concrete structure and basis, and C15 is for mixing
Solidifying soil padding, reinforcing bar: HPB235 grades, HRB335 grades, HRB400 grades, steel: Q235, Q345, bolt: 4.8,6.8,8.8 grades.
4. a kind of method designed with electrical engineering height for low meter according to claim 1, which is characterized in that the power distribution station
Building classification of providing fortification against earthquakes by GB5011-2010 " seismic design provision in building code " and GB50260-2013 " electric power facility
Earthquake resistant design code " design, security level is second level, and coefficient for importance of structure 1.0, key construction, basis all use frame
Frame and brick mix structure, building use strip footing.
5. a kind of method designed with electrical engineering height for low meter according to claim 1, which is characterized in that the low tension
Power capacitor uses self healing capacitor, and the parameter of power capacitor is that overcurrent is greater than 1.3In, and surge current is greater than 200In,
Reactive compensation capacity is 30% compensation of transformer capacity.
6. a kind of method designed with electrical engineering height for low meter according to claim 1, which is characterized in that the transformer
High-pressure side is equipped with Zinc-Oxide Arrester, and area with more lightning activities low-pressure side is equipped with Zinc-Oxide Arrester.
7. a kind of method designed with electrical engineering height for low meter according to claim 1, which is characterized in that the level connects
Ground body is made of the Hot-dip zinc-coated flat steel sheet of 50 × 5mm, and Grounding Grids are made of the hot galvanizing angle steel of 50 × 5 × 2500mm, ground connection
Net builds up rear personnel and carries out surveying total grounding resistance, and grounded screen electric resistance is adjusted to 2 Ω.
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| CN201810547906.3A CN108964015A (en) | 2018-05-31 | 2018-05-31 | A method of it is designed with electrical engineering height for low meter |
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| CN201810547906.3A CN108964015A (en) | 2018-05-31 | 2018-05-31 | A method of it is designed with electrical engineering height for low meter |
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| CN108964015A true CN108964015A (en) | 2018-12-07 |
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Application publication date: 20181207 |
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| RJ01 | Rejection of invention patent application after publication |