Standard number: QX/T 522-2019
Standard name: Protective technique guide of automatic weather station for ocean weather observing
English name: Protective technique guide of automatic weather station for ocean weather observing ||
tt||Standard format: PDF
Release time: 2019-12-26
Implementation time: 2020-04-01
Standard size: 1.45M
Standard introduction: This standard specifies the protection content and technical indicators, corrosion and aging protection, wind attack protection, lightning protection, animal hazard protection and maintenance requirements of automatic weather stations for ocean meteorological observation
This standard applies to the installation and maintenance of automatic weather stations on coasts, islands, reefs, offshore platforms, etc. 2 Normative reference documents
The following documents are essential for the application of this document. For all referenced documents with dates, only the versions with dates apply to this document. For any undated referenced documents, the latest version (including all amendments) applies to this document
GB/T1591-2018 Low alloy high strength structural steel
GB/T2972-2016 Test method for copper sulfate of zinc layer on galvanized steel wire (ISO7989-2:2007, NEQ)
GB/T3048.9-2007 Test methods for electrical properties of wires and cables Part 9: Spark test for insulated cores This standard was drafted in accordance with the rules given in GB/T1.1-2009
This standard was proposed and managed by the National Technical Committee for Standardization of Meteorological Instruments and Observation Methods (SAC/TC507). This standard was drafted by: Hainan Meteorological Observation Center, Jiangsu Radio Science Research Institute Co., Ltd. The main drafters of this standard are: Lu Tujin, Zhao Zhiqiang, Jin Hongwei, Kuang Changwu, Hua Weidong, Li Dajun, Yan Xiaodong, Wang Xiangmeng, Pan Longlun
This standard specifies the protection content and technical indicators, corrosion and aging protection, wind attack protection, lightning protection, animal hazard protection and maintenance requirements of automatic weather stations for marine meteorological observation. This standard applies to the installation and maintenance of automatic weather stations on coasts, islands and reefs, and offshore platforms.

ICS07.060
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Meteorological Industry Standard of the People's Republic of China
QX/T522—2019
Protective technique guide of automatic weather station for ocean WeatherObserving
Released on 2019-12-26
China Meteorological Administration
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Implemented on 2020-04-01
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Normative reference documents
Terms and definitions
Protection content and technical indicators
Protection content
Protection technical indicators
5 Corrosion and aging protection
General principles
Material selection
Welding process
Plating process
Shell protection
Electronic components| |tt||Sensor
Battery
On-site installation
Wind strike protection
Lightning protection
Lightning protection area
Lightning protection grounding network
7.3 Facility grounding
7.4 Surge protector
8 Animal hazard protection.
Maintenance requirements
References
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QX/T522—2019
QX/T522-2019
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This standard was drafted in accordance with the rules given in GB/T1.1—2009. This standard was proposed and managed by the National Technical Committee for Standardization of Meteorological Instruments and Observation Methods (SAC/TC507). This standard was drafted by: Hainan Meteorological Observation Center, Jiangsu Radio Science Research Institute Co., Ltd. The main drafters of this standard are: Lu Tujin, Zhao Zhiqiang, Jin Hongwei, Kuang Changwu, Hua Weidong, Li Dajun, Yan Xiaodong, Wang Xiangmeng, Pan Longlun. YiikAa-cJouakAa
1 Scope
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Technical Guide for Protection of Automatic Weather Stations for Marine Meteorological Observation QX/T522—2019
This standard specifies the protection content and technical indicators, corrosion and aging protection, wind attack protection, lightning protection, animal hazard protection and maintenance requirements of automatic weather stations for marine meteorological observation. This standard applies to the installation and maintenance of automatic weather stations on coasts, islands and reefs, and offshore platforms. 2 Normative references
The following documents are indispensable for the application of this document. For all dated references, only the dated version applies to this document. For any undated referenced documents, the latest version (including all amendments) shall apply to this document GB/T1591—2018
GB/T2972—2016
Low alloy high strength structural steel
Test method for zinc layer of galvanized steel wire-Copper sulfate (ISO7989-2:2007, NEQ) GB/T3048.9—2007
GB/T3956—2008
GB/T4208—2017
Test methods for electrical properties of wires and cables-Part 9: Spark test for insulated cores Conductors of cables (IEC60228:2004, IDT) Degree of protection provided by enclosures (IP code) (IEC60529:2013, IDT) GB/T4909.92009| |tt||GB/T16474—2011
Bare wire test method Part 9: Coating continuity test Sodium polysulfide method
Deformed aluminum and aluminum alloy grade indication method
GB/T17626.5—2019
2014.IDT)
GB/T31162—2014
GB/T337032017
3 Terms and definitions
Test and measurement technology
Electromagnetic compatibility
Surge (impact) immunity test (IEC61000-4-5: Ground meteorological observation field (room) lightning protection technical specification Automatic weather station observation specification
The following terms and definitions apply to this document. 3.1
automatic weather station station
Automatic weather station
A device that can automatically observe, store and transmit ground-based meteorological observation data [GB/T35221—2017, definition 3.3]
corrosion
The physical-chemical interaction between metals and the environment, which results in changes in the properties of the metals and often leads to damage to the functions of the metals, the environment or the technical systems of which they are components. Note: The interaction is usually of an electrochemical nature. [GB/T10123—2001, definition 2.1]］
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QX/T522—2 019
Protection content and technical indicators
Protection content
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It is advisable to protect the following aspects:
Corrosion and aging;
Wind attack;
Lightning strike;
Animal harm.
Protection technical indicators
Corrosion and agingbzxz.net
Should meet the requirements of Table 1.
Table 1 Corrosion and aging protection technical indicators
Exposure time
Allowable rust area ratio of metal materials
Note 1: The rust area ratio of metal materials can be determined by the cross-cutting method of JISG0595:2004. Note 2: The degree of coating aging can be determined by the coating surface damage assessment method of GB/T1766 4.2.2 Wind attack
Should be able to resist an average wind speed of 60m/s and a gust of 90m/s. 4.2.3 Lightning strike
Allowable aging degree of coating
No change, i.e. no perceptible change
Very slight, i.e. just perceptible change
Slight, i.e. clearly perceptible change
Medium, i.e. clearly perceptible change
The surge protection capability of the AC power port of the instrument shall not be lower than Level 3 (2kV) in Table 1, Chapter 5 of GB/T17626.5-2019. Animal hazard
Animal intrusion and damage to the equipment shall be prevented.
Corrosion and aging protection
5.1 General principles
The following principles should be followed:
Use suitable corrosion-resistant materials and take appropriate surface treatment protection measures such as plating and coating; a)
Effectively seal the protective structures such as chassis and shells, and prevent internal water vapor condensation and corrosion; 2
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QX/T522—2019
Reasonably select metal materials for the connection parts between structures to avoid electrochemical corrosion caused by different metal electrode potentials; d) Reduce or eliminate stress concentration and residual stress to prevent stress corrosion; adopt appropriate process methods to prevent or slow down corrosion; e
When necessary, adopt protective measures to isolate the corrosive environment; when necessary, adopt cathodic protection and anodic protection measures. 5.2 Material selection
5.2.1 Metal materials
The following principles should be followed:
a) Under the premise of meeting the functional and performance requirements, the corrosion resistance and coating and plating requirements of the materials should be given priority. Metal structural parts are preferably made of 316 stainless steel, and other materials should meet the following requirements:b)
1) Stainless steel is preferably made of grades with low impurity content such as nitrogen, phosphorus, sulfur, and silicon. Under the premise of meeting the strength design requirements, low carbon content should be selected;2)
Aluminum is preferably made of alloy materials with low impurity content such as iron, magnesium, and silicon;3) The lead content in bronze should be less than 0.02%;4) Do not use metal materials that are prone to stress corrosion crackingc) Interconnection materials should use compatible materials with galvanic corrosion compatibility, contact corrosion compatibility, etc. to avoid corrosion battery effects or electrochemical reactions.
Wind towers and wind poles should be made of hot-dip galvanized steel or alloy steel materials that comply with GB/T1591-2018 (such as Q345 grade). Wind poles d)
can also be made of aluminum alloy materials that comply with GB/T16474-2011. 5.2.2 Non-metallic materials
It is advisable to use materials that are resistant to ultraviolet aging, heat and oxygen aging, light aging, mildew, high and low temperature, water and oil. EPDM rubber is preferred
It is advisable to avoid using materials that are toxic or can release toxic gases. 5.3 Welding process
5.3.1 Basic requirements
It is advisable to make the weld metal after welding have the same composition as the parent material as much as possible to prevent intergranular corrosion. It is advisable to follow the following methods: a) Use argon arc welding process;
b) Select welding materials whose chemical composition of the deposited metal is equivalent to that of the parent material. 5.3.2 Welding quality
5.3.2.1 Spot welding
Should meet the following requirements:
The welding is firm and no desoldering phenomenon should occur. a)
b) There should be no obvious spot welding marks on the outer surface formed by spot welding after spraying. The minimum spot welding margin is based on the principle of not causing edge crushing or cracking. c)
d) The overlap is generally twice the margin, and the overlap of sheet metal parts is in accordance with the requirements of Table 23
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QX/T522—2019
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Table 2 Overlap of sheet metal parts
Overlap
The depth of the indentation on the spot welding spot shall not exceed 15% of the actual thickness of the plate. The indentation diameter of the spot welding spot is allowed to be 15% larger or 10% smaller than the value specified in the drawing.
The mutual position of the welding points is allowed to deviate from the drawing by 2mm. If the offset exceeds 1.5mm but does not exceed 2mm, the length of the weld shall not exceed 30% of the total length of the weld.
Incomplete penetration, core displacement, excessive indentation, surface melting and burning through, cracks, looseness and shrinkage are not allowed. g)
h) Spot welds are not allowed to have obvious displacement and large deformation. Fusion welding joints
should meet the following requirements:
Butt joints and external corner joints: the weld width is 2 to 4 times the material thickness: b)
The weld height is not less than 1/4 of the material thickness, or not more than 2mm (the minimum value); c)
T-joint type: the weld leg size is 2 to 4 times the material thickness; lap joint type: the weld leg size is 2 to 4 times the material thickness; d
The weld should be uniform along the entire length.
5.3.2.3 Defects
Should meet the following requirements:
No cracks on the weld joint;
Surface pores on the weld can be repaired by welding;
The total number of internal pores and slag inclusions on a 100mm long weld shall not exceed 2 (defect size 0.8mm~1.5mm); There shall be no welding leakage, burn-through, or incomplete welding of shell-type structural parts such as chassis, and other structural parts can be repaired by welding; if necessary, internal defects can be inspected by X-ray flaw detector. 5.4 Plating process
The wind tower is treated with hot-dip galvanizing process for corrosion protection, and the coating should meet the following requirements: a)
Coverage rate 100%.
The surface is free of cracks, wrinkles, scars and pitting. The thickness meets the following requirements:
1) When the thickness of the workpiece is less than 3mm, the average thickness of the coating is greater than 55um, and the local thickness is greater than 45um; 2) When the thickness of the workpiece is 3mm~6mm, the average thickness of the coating is greater than 70μm, and the local thickness is greater than 55μm; ika-cJouak
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3) When the thickness of the workpiece is greater than 6mm, the average thickness of the coating is greater than 85μm, and the local thickness is greater than 70μm. Note: The corrosion rate of zinc coating in coastal air is about 4jum/a. 5.4.2 Other metal structural parts
It is advisable to use electrostatic spraying technology for coating, so that the plastic powder is not evenly adsorbed on the metal surface to form a powder coating. The coating is melted by high-temperature baking to solidify it on the metal surface to form a uniform protective layer. 5.5 Shell protection
Except for the specially set ventilation parts, the chassis and shell should meet the IP65 protection level requirements of GB/T4208-2017. The following methods are recommended:
a) The shell sealing strip is made of polyurethane material and is made through a foaming process; b) A waterproof cable connector with a protection level not lower than IP65 is used, and the connector specifications match the outer diameter of the cable; reasonable protection measures are taken at the ventilation parts so that rain and snow cannot enter the shell through the ventilation parts under working conditions, and the entry of moisture and salt spray can be avoided or slowed down;
The redundant cable holes on the chassis or shell are sealed. 5.6 Cables
5.6.1 Basic requirements
It is advisable to comply with the following requirements:
Use armored cables, or use sheathed cables and add stainless steel hose protective covers; a)
Use concealed wiring, and use protective covers or glass glue to seal the interconnection parts; b)
After the grounding cable is tightened, add a protective cover or apply protective paint. The outer sheath
It is advisable to use the following materials:
Rat-proof and ant-proof polyvinyl chloride;
Rat-proof and ant-proof polyethylene;
Rat-proof and ant-proof thermoplastic polyolefin.
5.6.3 Armor
It is advisable to use the following methods:
a) Double steel belt;
Fine steel wire;
Tinned copper wire braiding;
Galvanized steel wire braiding.
5.6.4 Conductor
5.6.4.1 The conductor shall comply with the provisions of GB/T3956-2008, and the specific composition shall comply with the provisions of Table 3. 5
YkAa-cJouaki
QX/T522-2019
Number of single wires/single wire
Nominal diameter
Root/mm
YTYKA-JOuaKA
Table 3 Cable conductor requirements
Fixed number cable conductor
Maximum conductor resistance at 20℃
Not tinned
Indicates no relevant requirements.
Number of single wires/single wire
Nominal diameter
Wire/mm
1221/0.50
1525/0.50
Conductor shape should be regular, surface smooth, without sharp protrusions or other defects that damage insulation. Soft cable conductor
Maximum conductor resistance at 20℃
Not tinned
Conductor can be non-compacted or compacted. The minimum nominal cross-section of compacted conductor is 10mm2. 5.6.5 Insulation
The average thickness should not be less than the nominal value, and the thinnest thickness should not be less than 90% of the nominal value minus 0.1mm. The insulated wire core should be able to withstand the power frequency spark test according to the method of GB/T3048.9-2007 and the test voltage in Table 4. YiikAa~cJoGakAa
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Insulated wire core test voltage
Insulation nominal thickness (t)
1.05mm but not more than 2mm, the weld length is not allowed to exceed 30% of the total weld length.
Incomplete penetration, core displacement, too deep indentation, surface melting and burning through, cracks, looseness and shrinkage are not allowed. g)
h) Spot welds are not allowed to have obvious offset and large deformation. Fusion welding joints
shall meet the following requirements:
Butt and external corner joint types: the weld width is 2 to 4 times the material thickness: b)
The weld height is not less than 1/4 of the material thickness, or not more than 2mm (the minimum value); c)
T-joint type: the weld leg size is 2 to 4 times the material thickness; lap joint type: the weld leg size is 2 to 4 times the material thickness; d
The weld should be uniform along the entire length.
5.3.2.3 Defects
Should meet the following requirements:
No cracks on the weld joint;
Surface pores on the weld can be repaired by welding;
The total number of internal pores and slag inclusions on a 100mm long weld shall not exceed 2 (defect size 0.8mm~1.5mm); There shall be no welding leakage, burn-through, or incomplete welding of shell-type structural parts such as chassis, and other structural parts can be repaired by welding; if necessary, internal defects can be inspected by X-ray flaw detector. 5.4 Plating process
The wind tower is treated with hot-dip galvanizing process for corrosion protection, and the coating should meet the following requirements: a)
Coverage rate 100%.
The surface is free of cracks, wrinkles, scars and pitting. The thickness meets the following requirements:
1) When the thickness of the workpiece is less than 3mm, the average thickness of the coating is greater than 55um, and the local thickness is greater than 45um; 2) When the thickness of the workpiece is 3mm~6mm, the average thickness of the coating is greater than 70μm, and the local thickness is greater than 55μm; ika-cJouak
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QX/T522—2019
3) When the thickness of the workpiece is greater than 6mm, the average thickness of the coating is greater than 85μm, and the local thickness is greater than 70μm. Note: The corrosion rate of zinc coating in coastal air is about 4jum/a. 5.4.2 Other metal structural parts
It is advisable to use electrostatic spraying technology for coating, so that the plastic powder is not evenly adsorbed on the metal surface to form a powder coating. The coating is melted by high-temperature baking to solidify it on the metal surface to form a uniform protective layer. 5.5 Shell protection
Except for specially set ventilation parts, the chassis and shell should meet the IP65 protection level requirements of GB/T4208-2017. The following methods are recommended:
a) The shell sealing strip is made of polyurethane material and is made through a foaming process; b) A waterproof cable connector with a protection level not lower than IP65 is used, and the connector specifications match the outer diameter of the cable; reasonable protection measures are taken at the ventilation parts so that rain and snow cannot enter the shell through the ventilation parts under working conditions, and the entry of moisture and salt spray can be avoided or slowed down;
The redundant cable holes on the chassis or shell are sealed. 5.6 Cables
5.6.1 Basic requirements
It is advisable to comply with the following requirements:
Use armored cables, or use sheathed cables and add stainless steel hose protective covers; a)
Use concealed wiring, and use protective covers or glass glue to seal the interconnection parts; b)
After the grounding cable is tightened, add a protective cover or apply protective paint. The outer sheath
It is advisable to use the following materials:
Rat-proof and ant-proof polyvinyl chloride;
Rat-proof and ant-proof polyethylene;
Rat-proof and ant-proof thermoplastic polyolefin.
5.6.3 Armor
It is advisable to use the following methods:
a) Double steel belt;
Fine steel wire;
Tinned copper wire braiding;
Galvanized steel wire braiding.
5.6.4 Conductor
5.6.4.1 The conductor shall comply with the provisions of GB/T3956-2008, and the specific composition shall comply with the provisions of Table 3. 5
YkAa-cJouaki
QX/T522-2019
Number of single wires/single wire
Nominal diameter
Root/mm
YTYKA-JOuaKA
Table 3 Cable conductor requirements
Fixed number cable conductor
Maximum conductor resistance at 20℃
Not tinned
Indicates no relevant requirements.
Number of single wires/single wire
Nominal diameter
Wire/mm
1221/0.50
1525/0.50
Conductor shape should be regular, surface smooth, without sharp protrusions or other defects that damage insulation. Soft cable conductor
Maximum conductor resistance at 20℃
Not tinned
Conductors can be either non-compacted or compacted. The minimum nominal cross-section of compacted conductors is 10mm2. 5.6.5 Insulation
The average thickness should not be less than the nominal value, and the thinnest thickness should not be less than 90% of the nominal value minus 0.1mm. The insulated wire core should be able to withstand the power frequency spark test according to the method of GB/T3048.9-2007 and the test voltage in Table 4. YiikAa~cJoGakAa
iKAa-cJouaKAa
Insulated wire core test voltage
Insulation nominal thickness (t)
1.05mm but not more than 2mm, the weld length is not allowed to exceed 30% of the total weld length.
Incomplete penetration, core displacement, too deep indentation, surface melting and burning through, cracks, looseness and shrinkage are not allowed. g)
h) Spot welds are not allowed to have obvious offset and large deformation. Fusion welding joints
shall meet the following requirements:
Butt and external corner joint types: the weld width is 2 to 4 times the material thickness: b)
The weld height is not less than 1/4 of the material thickness, or not more than 2mm (the minimum value); c)
T-joint type: the weld leg size is 2 to 4 times the material thickness; lap joint type: the weld leg size is 2 to 4 times the material thickness; d
The weld should be uniform along the entire length.
5.3.2.3 Defects
Should meet the following requirements:
No cracks on the weld joint;
Surface pores on the weld can be repaired by welding;
The total number of internal pores and slag inclusions on a 100mm long weld shall not exceed 2 (defect size 0.8mm~1.5mm); There shall be no welding leakage, burn-through, or incomplete welding of shell-type structural parts such as chassis, and other structural parts can be repaired by welding; if necessary, internal defects can be inspected by X-ray flaw detector. 5.4 Plating process
The wind tower is treated with hot-dip galvanizing process for corrosion protection, and the coating should meet the following requirements: a)
Coverage rate 100%.
The surface is free of cracks, wrinkles, scars and pitting. The thickness meets the following requirements:
1) When the thickness of the workpiece is less than 3mm, the average thickness of the coating is greater than 55um, and the local thickness is greater than 45um; 2) When the thickness of the workpiece is 3mm~6mm, the average thickness of the coating is greater than 70μm, and the local thickness is greater than 55μm; ika-cJouak
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QX/T522—2019
3) When the thickness of the workpiece is greater than 6mm, the average thickness of the coating is greater than 85μm, and the local thickness is greater than 70μm. Note: The corrosion rate of zinc coating in coastal air is about 4jum/a. 5.4.2 Other metal structural parts
It is advisable to use electrostatic spraying technology for coating, so that the plastic powder is not evenly adsorbed on the metal surface to form a powder coating. The coating is melted by high-temperature baking to solidify it on the metal surface to form a uniform protective layer. 5.5 Shell protection
Except for the specially set ventilation parts, the chassis and shell should meet the IP65 protection level requirements of GB/T4208-2017. The following methods are recommended:
a) The shell sealing strip is made of polyurethane material and is made through a foaming process; b) A waterproof cable connector with a protection level not lower than IP65 is used, and the connector specifications match the outer diameter of the cable; reasonable protection measures are taken at the ventilation parts so that rain and snow cannot enter the shell through the ventilation parts under working conditions, and the entry of moisture and salt spray can be avoided or slowed down;
The redundant cable holes on the chassis or shell are sealed. 5.6 Cables
5.6.1 Basic requirements
It is advisable to comply with the following requirements:
Use armored cables, or use sheathed cables and add stainless steel hose protective covers; a)
Use concealed wiring, and use protective covers or glass glue to seal the interconnection parts; b)
After the grounding cable is tightened, add a protective cover or apply protective paint. The outer sheath
It is advisable to use the following materials:
Rat-proof and ant-proof polyvinyl chloride;
Rat-proof and ant-proof polyethylene;
Rat-proof and ant-proof thermoplastic polyolefin.
5.6.3 Armor
It is advisable to use the following methods:
a) Double steel belt;
Fine steel wire;
Tinned copper wire braiding;
Galvanized steel wire braiding.
5.6.4 Conductor
5.6.4.1 The conductor shall comply with the provisions of GB/T3956-2008, and the specific composition shall comply with the provisions of Table 3. 5
YkAa-cJouaki
QX/T522-2019
Number of single wires/single wire
Nominal diameter
Root/mm
YTYKA-JOuaKA
Table 3 Cable conductor requirements
Fixed number cable conductor
Maximum conductor resistance at 20℃
Not tinned
Indicates no relevant requirements.
Number of single wires/single wire
Nominal diameter
Wire/mm
1221/0.50
1525/0.50
Conductor shape should be regular, surface smooth, without sharp protrusions or other defects that damage insulation. Soft cable conductor
Maximum conductor resistance at 20℃
Not tinned
Conductor can be non-compacted or compacted. The minimum nominal cross-section of compacted conductor is 10mm2. 5.6.5 Insulation
The average thickness should not be less than the nominal value, and the thinnest thickness should not be less than 90% of the nominal value minus 0.1mm. The insulated wire core should be able to withstand the power frequency spark test according to the method of GB/T3048.9-2007 and the test voltage in Table 4. YiikAa~cJoGakAa
iKAa-cJouaKAa
Insulated wire core test voltage
Insulation nominal thickness (t)
1.01 The conductor shall comply with the provisions of GB/T3956-2008, and the specific composition shall comply with the provisions of Table 3. 5
YkAa-cJouaki
QX/T522-2019
Number of single wires/single wire
Nominal diameter
Root/mm
YTYKA-JOuaKA
Table 3 Cable conductor requirements
Fixed number cable conductor
Maximum conductor resistance at 20℃
Not tinned
Indicates no relevant requirements.
Number of single wires/single wire
Nominal diameter
Wire/mm
1221/0.50
1525/0.50
Conductor shape should be regular, surface smooth, without sharp protrusions or other defects that damage insulation. Soft cable conductor
Maximum conductor resistance at 20℃
Not tinned
Conductors can be either non-compacted or compacted. The minimum nominal cross-section of compacted conductors is 10mm2. 5.6.5 Insulation
The average thickness should not be less than the nominal value, and the thinnest thickness should not be less than 90% of the nominal value minus 0.1mm. The insulated wire core should be able to withstand the power frequency spark test according to the method of GB/T3048.9-2007 and the test voltage in Table 4. YiikAa~cJoGakAa
iKAa-cJouaKAa
Insulated wire core test voltage
Insulation nominal thickness (t)
1.01 The conductor shall comply with the provisions of GB/T3956-2008, and the specific composition shall comply with the provisions of Table 3. 5
YkAa-cJouaki
QX/T522-2019
Number of single wires/single wire
Nominal diameter
Root/mm
YTYKA-JOuaKA
Table 3 Cable conductor requirements
Fixed number cable conductor
Maximum conductor resistance at 20℃
Not tinned
Indicates no relevant requirements.
Number of single wires/single wire
Nominal diameter
Wire/mm
1221/0.50
1525/0.50
Conductor shape should be regular, surface smooth, without sharp protrusions or other defects that damage insulation. Soft cable conductor
Maximum conductor resistance at 20℃
Not tinned
Conductor can be non-compacted or compacted. The minimum nominal cross-section of compacted conductor is 10mm2. 5.6.5 Insulation
The average thickness should not be less than the nominal value, and the thinnest thickness should not be less than 90% of the nominal value minus 0.1mm. The insulated wire core should be able to withstand the power frequency spark test according to the method of GB/T3048.9-2007 and the test voltage in Table 4. YiikAa~cJoGakAa
iKAa-cJouaKAa
Insulated wire core test voltage
Insulation nominal thickness (t)
1.0
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