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GB/T 4208-2017 (GBT 4208-2017)

Chinese Standard: 'GB/T 4208-2017'
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BASIC DATA
Standard ID GB/T 4208-2017 (GB/T4208-2017)
Description (Translated English) Degrees of protection provided by enclosure(IP code)
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard K09
Classification of International Standard 13.260
Word Count Estimation 38,373
Date of Issue 2017-07-31
Date of Implementation 2018-02-01
Drafting Organization Machinery Industry Beijing Institute of Technology and Economic Technology, Hangzhou River Switch Co., Ltd., Shanghai Electric Tools Research Institute, Wei Kai Detection Technology Co., Ltd., Suzhou Electric Science Research Institute Co., Ltd., Shanghai Electrical Equipment Testing Institute, Guangdong product quality supervision and inspection Research Institute, Dongguan Guang-An Electric Testing Center Co., Ltd., Zhejiang Zhengtai Electric Appliance Co., Ltd., Dongguan Kexiang Test Equipment Co., Ltd., Tianshui 2111 Electric Co., Ltd., Beijing ABB Low Voltage Electric Co., Ltd., Nanjing Mannai Kesi Electric Co., Ltd. Company, Schneider Electric (Shanghai) Co., Ltd., Beijing Breakthrough Electric Co., Ltd.
Administrative Organization National Electrical Safety Standardization Technical Committee (SAC / TC 25)
Proposing organization National Electrical Safety Standardization Technical Committee (SAC / TC 25)
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China, China National Standardization Administration Committee

GB/T 4208-2017
Degrees of protection provided by enclosure(IP code)
ICS 13.260
K09
National Standards of People's Republic of China
Replacing GB/T 4208-2008
Shell protection class (IP code)
(IEC 60529.2013, IDT)
Published on.2017-07-31
2018-02-01 Implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
China National Standardization Administration released
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 4208-2008 "Enclosure Protection Level (IP Code)"; this standard and GB/T 4208-2008 "Shell Protection
Compared with the grade (IP code), the main technical changes except the editorial modification are as follows.
---4.1, adding the second feature digit 9 to the IP code configuration;
---4.2, increase the meaning of the second characteristic number 9;
---4.3, an example of adding a 3-marker to the IPX5/IPX7/IPX9 shell;
--- Chapter 6, Revising the Application of the Second Feature Value Above 6;
--- Table 8, to increase the water resistance test method and main test conditions of the second characteristic number 9;
---14.2.9, increase the second characteristic number 9 water spray test;
--- Increase the size of Figure 7 --- fan nozzle;
--- Increase the size of Fig. 8 --- fan nozzle nozzle for testing;
--- Increased Figure 9 - Example of fan nozzles with different surface smoothness;
--- Addition of Figure 10 --- Measuring the impact of water spray, anti-IPX9 high temperature/high pressure water spray device;
--- Figure 11 --- impact force distribution;
--- Increased Figure 12 --- Inspection IPX9 protection grade of small enclosures, high temperature/high pressure water spray;
--- Add Appendix B B.25.
This standard uses the translation method equivalent to using IEC 60529.2013 "Enclosure Protection Level (IP code)" (English version).
The Chinese documents that have a consistent correspondence with the normatively cited international documents in this standard are as follows.
---GB/T 311.2-2013 Insulation coordination - Part 2. Guidelines for use (IEC 60071-2.1996, MOD)
---GB/T 2900.71-2008 Electrical Apparatus for Electrical Terms (IEC 60050-826.2004, IDT)
---GB/T 2900.73-2008 Electrical Terminology Grounding and Shock Protection (IEC 60050-195.1998, MOD)
This standard is proposed and managed by the National Electrical Safety Standardization Technical Committee (SAC/TC25).
This standard is mainly drafted by. Beijing Electrotechnical and Economic Research Institute of Machinery Industry, Hangzhou Zhijiang Switch Co., Ltd., Shanghai Electric
Tool Institute, Weikai Detection Technology Co., Ltd., Suzhou Electric Apparatus Research Institute Co., Ltd., Shanghai Electrical Equipment Inspection Institute, Guangdong
Quality Supervision and Inspection Institute, Dongguan Guang'an Electric Testing Center Co., Ltd., Zhejiang Zhengtai Electric Co., Ltd., Dongguan City Kexiang
Test Equipment Co., Ltd., Tianshui February 13 Electrical Appliance Co., Ltd., Beijing ABB Low Voltage Electrical Appliance Co., Ltd., Nanjing Mennekes Electric Appliance Co., Ltd.
Division, Schneider Electric (Shanghai) Co., Ltd., Beijing Breakthrough Electric Co., Ltd.
The main drafters of this standard. Guo Ting, Ma Hong, Ma Xuefeng, Pan Shunfang, Liu Gonggui, Zhang Min, Wang Aiguo, Zeng Yanhong, Ma Guifen, Yuan Xiaoyu,
Chen Jianbing, Fang Fengshu, Che Hansheng, Ke Changzheng, Ni Lan, Wang Zhongdan, Liang Jun, Zhang Ping, and Jin Weidong.
The previous versions of the standard replaced by this standard are.
--- GB 4208-1984, GB 4208-1993, GB/T 4208-2008.
introduction
This standard describes the rating system provided by the electrical equipment enclosure. Although this system is suitable for most types of electrical
Equipment, but not all types of protection are necessarily applied to specific types of electrical equipment. Manufacturers of equipment should be advised to determine the appropriate protection
Protect grades and apply equipment components of this grade.
The application of this grading system will make the narrative method and the corresponding level of test methods provided by the outer shell as uniform as possible. This
The wider range of products that will make the test equipment suitable will also reduce the number of test equipment required.
The second edition of IEC 60529 takes into account the experience of the first edition and clarifies the requirements. When actually preventing people from approaching dangerous parts
Above the level indicated by the first feature number, this standard provides optional extended ranges by appending the letters A, B, C, and D.
This revision only increases the protection level of the second characteristic number 9 and does not modify the degree of protection already specified in GB/T 4208-2008.
Therefore, the existing test methods are not modified.
In general, the shell labeled with an IP code in the previous version will fit the same level as this version.
Shell protection class (IP code)
1 Scope
This standard applies to rated voltage does not exceed 72.5kV, with the protection of electrical equipment protection class.
The purpose of this standard is as follows.
a) Enclosure protection rating for electrical equipment as follows.
1) Protection against human body touching dangerous parts inside the enclosure;
2) Protection against the entry of solid foreign matter into the equipment inside the enclosure;
3) Protection against harmful effects of water entering the enclosure.
b) Identification of the degree of protection.
c) Requirements for each level of protection marking.
d) Verification test of the shell according to the requirements of this standard.
The extent and manner of various types of products refer to the degree of protection of the enclosure, and what kind of enclosure is used, to be determined by product standards, and for specific protection
The tests used for the grades shall comply with the provisions of this standard, and additional requirements may be added to the relevant product standards when necessary. Can be in the relevant product standard
Refer to Appendix B for details of the specific provisions for quasi-in-China.
For special types of equipment, product standards can specify different requirements, but at least ensure the same level of safety.
This standard only considers enclosures that meet the requirements of relevant product standards in all aspects. Under normal conditions of use, the materials and processes of the enclosure should be
Ensure that the required degree of protection is achieved.
If a certain type of equipment meets the general requirements of the test and the selected degree of protection applies to the type of equipment, this standard also applies to this type of equipment.
Empty housing of type equipment.
Related to mechanical damage, rust, corrosive solvents (such as cutting fluids), molds, insect pests, solar radiation, icing, moisture (as caused by condensation), explosions
Explosive gas and other external influences or environmental conditions to prevent damage to the equipment in the enclosure and enclosure and to prevent external moving parts with the enclosure
The contact (eg fan) is regulated by the relevant product standard.
Partitions that are not connected to the enclosure and barriers that are specifically designed for personal safety are not considered as part of the enclosure and are not studied in this standard.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
GB/T 2421.1-2008 Overview and Guide for Environmental Testing of Electrical and Electronic Products (IEC 60068-1.1988, IDT)
GB/T 2423.37-2006 Environmental testing for electric and electronic products Part 2. Test methods Test L. Sand dust test
(IEC 60068-2-68.1994, IDT)
IEC 60050-195..1998 International Electrotechnical Terminology, Part 195. Grounding and electric shock protection
IEC 60050(826).1982 International Electrotechnical Term 826. Electrical Installations for Buildings
IEC 60071-2.1996 Insulation coordination - Part 2. Guidelines for use
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
Enclosure
Devices that prevent the device from being exposed to certain external influences and that prevent direct contact in all directions.
Note. This definition is taken from the current International Electrotechnical Vocabulary (IEV) and is explained within the scope of this standard as follows.
1) The enclosure provides protection of the person or animal from the hazardous parts inside the enclosure.
2) Preventing or limiting the entry of partitions, openings or other openings in the test equipment specified in this standard, whether attached to the outer shell or sheathed
Prepared, are counted as part of the shell, except the parts can be removed without the use of keys or tools.
[IEC 826-03-12]
3.2
Direct contact with directcontact
Human or animal contact with live parts.
Note. According to the information given in the IEV definition, "direct contact" in this standard is replaced by "close to dangerous parts".
[IEC 826-03-05]
3.3
Protection degree degreeofprotection
According to the inspection method specified in the standard, the protection provided by the enclosure to the person near the dangerous part, the prevention of the entry of solid foreign matter or the entry of water shall be determined.
degree.
3.4
IP code IPcode
Indicates the degree of protection of the enclosure from access to hazardous parts, prevention of the entry of solid foreign matter or water, and gives additional protection related to these protections
Information code system.
3.5
Hazardouspart hazardous part
Parts that are dangerous when approaching or touching.
3.5.1
Hazardous live parts hazardouslivelivepart
A charged part that can cause a harmful electrical shock under certain conditions.
[IEC 60050-195, definition 195-06-05]
3.5.2
Hazardous mechanical parts
Contact with dangerous moving parts. Except smooth rotating axis.
3.6
Housing protection against dangerous parts protectionprovidedbyanenclosureagainstaccesstohazardousparts
Shell to human body.
--- Protection from contact with dangerous low-voltage live parts;
--- Protection from contact with dangerous mechanical parts;
--- Prevents dangerous high-voltage live parts from being exposed if there is not enough room inside the enclosure.
Note. This protection can be assisted by.
--- Shell itself;
--- The baffle that is part of the enclosure or is achieved by means of the distance within the enclosure.
3.7
Prevent enough gaps close to dangerous parts adequateclearanceforprotectionagainstaccesstohazardousparts
Prevents touching the test tool to or near the dangerous part.
3.8
Touch the test tool accessprobe
Can easily imitate a part of the human body or imitate a tool or the like, hand held by the person to check whether there is enough clearance from the dangerous part
Inspection tools.
3.9
Object test object object
An inspection tool that simulates the detection of solid foreign matter and its possibility of entering the enclosure.
3.10
Opening
The holes or crevices that are present in the enclosure itself or that have been imposed by the test tool with a defined external force.
4 Identification
The degree of protection provided by the enclosure is indicated in the following manner using the IP code.
4.1 Configuration of IP Codes
IP 2 3 CH
Code letter
(International Protection)
First feature number
(number 0~6 or letter)
Second feature number
(numbers 0-9 or letters)
Additional letter
(letters A, B, C, D)
Supplementary letter
(The letters H, M, S, W)
When it is not required to specify a feature number, it is replaced by the letter "X" (if both letters are omitted, "XX" is used).
Additional letters and/or supplementary letters can be omitted without replacement.
When more than one supplemental letter is used, they should be arranged alphabetically.
When the housing uses different mounting methods to provide different degrees of protection, the manufacturer shall indicate the protection against the corresponding installation instructions.
Protection level.
See Chapter 10 for details of the shell logo method.
4.2 Elements of the IP Code and Their Meanings
A brief description of each element of the IP code is given in the table below. For details, see the section indicated in the last column of the table.
Composition Numbers or Letters Meaning of Device Protection Meaning of Personnel Protection Reference Chapter
Code letter
The first one
Feature number
IP
Prevent the entry of solid foreign matter
No protection
≥ diameter 50mm
≥ diameter 12.5mm
≥ diameter 2.5mm
≥ diameter 1.0mm
dust-proof
Dense
Prevents access to dangerous parts
No protection
Hand back
finger
tool
metal wire
metal wire
metal wire
Chapter 5
second
Feature number
Additional letter
(optional)
Supplementary letter
(optional)
Prevent harmful effects of water ingress
No protection
Vertical drip
15° drop of water
Watering
Splashing water
Water spray
Violent water spray
Short time soaking
Continuous water immersion
High temperature/high pressure water jet
Specially supplemented information
High-voltage equipment
Test run when waterproof test
Static test specimen when making waterproof test
Climatic conditions
Prevents access to dangerous parts
Hand back
finger
tool
metal wire
Chapter 6
Chapter 7
Chapter 8
4.3 IP Code Application Examples
The following is an example of IP code application and letter configuration. See Chapter 9 for more examples.
IP44 - no additional letters, no optional letters.
IPX5 --- omitted the first feature number.
IP2X --- omit the second feature number.
IP20C---Use additional letters.
IPXXC --- omits two characteristic numbers, using additional letters.
IPX1C --- omitted the first feature number, using additional letters.
IP3XD --- omit the second feature number, using additional letters.
IP23S--- use supplementary letters.
IP21CM---Use additional letters and supplementary letters.
IPX5/IPX7/IPX9---The shell is marked with 3 symbols (indicating that it can prevent water spray, prevent short time flooding and prevent high temperature/high pressure water jet
Three levels of protection required).
5 Protection level indicated by the first characteristic number to prevent access to dangerous parts and prevent the entry of solid foreign matter
The identification of the first characteristic digit indicates that both conditions 5.1 and 5.2 can be satisfied.
The first characteristic number means.
The enclosure protects the person by preventing a part of the human body or the human hand object from approaching the dangerous part;
The enclosure protects the device by preventing solid foreign objects from entering the device.
When the enclosure also meets all levels below a certain degree of protection, this level should be identified only by that number.
If the test is clearly applicable to any lower degree of protection, tests below this level do not have to be carried out.
5.1 Protection from Nearly Hazardous Parts
Table 1 gives a short description and the meaning of the degree of protection to near-dangerous parts.
In the table, only the first characteristic number specifies the degree of protection, and the brief description and meaning are not regarded as the protection level.
According to the provisions of the first characteristic figure, sufficient clearance should be maintained between the test tool and the dangerous part.
See Chapter 12 for the test.
Table 1 The degree of protection against dangerous parts indicated by the first characteristic number
The first one
Feature number
Protection level
Brief description meaning
Test conditions see chapter
0 No protection - -
1 Preventing the back of the hand from reaching dangerous parts
50mm diameter spherical test fixtures should be associated with hazardous components
There is enough clearance
12.2
2 Prevent finger access to dangerous parts
12mm diameter, 80mm long hinged finger
Should have enough clearance with dangerous parts
12.2
3 The test tool that prevents the tool from approaching the 2.5mm diameter of the hazardous part shall not enter the housing 12.2
4 The test device that prevents the wire from approaching the 1.0mm diameter of the hazardous part must not enter the housing 12.2
5 The test device that prevents the wire from approaching the 1.0mm diameter of the hazardous part must not enter the housing 12.2
6 The test device that prevents the wire from approaching the 1.0mm diameter of the hazardous part shall not enter the housing 12.2
Note. For the first feature numbers 3, 4, 5, and 6, if the test tool maintains sufficient clearance with the hazardous parts inside the enclosure, it is considered to meet the requirements. foot
An adequate gap is set by the product standard committee according to 12.3.
Since the provisions of Table 2 are satisfied at the same time, Table 1 specifies "no entry."
5.2 Protection Against Entry of Solid Foreign Matter
Table 2 gives a short description and meaning of the degree of protection against the entry of solid foreign objects (including dust).
In the table, only the first characteristic number specifies the degree of protection, and the brief description and meaning are not regarded as the protection level.
To prevent the entry of solid foreign matter, when the first feature number in Table 2 is 1 or 2, the object test device must not completely enter the housing, ie the ball
The entire diameter must not pass through the housing opening. When the first characteristic number is 3 or 4, the object tester must not enter the housing at all.
The dustproof enclosure number 5 allows access to a limited amount of dust under certain specified conditions.
The dust-tight enclosure of number 6 does not allow any dust to enter.
Note. Normally, when the first characteristic number is 1 to 4, the vertical dimension of the object exceeds the corresponding number specified in the third column of Table 2, regardless of
It is not possible for a regular or irregular object test fixture to enter the enclosure.
See Chapter 13 for testing.
Table 2 Degree of protection against solid foreign matter entry indicated by the first characteristic number
The first one
Feature number
Protection level
Brief description meaning
Test conditions see chapter
0 No protection - -
Prevent the diameter of not less than 50mm
Solid foreign body
50mm diameter spherical object test equipment must not be completely
Into the shell a
13.2
Prevents diameters no less than 12.5mm
Solid foreign matter
12.5mm diameter spherical object test equipment shall not
Completely into the shell
13.2
Prevents the diameter of not less than 2.5mm
Solid foreign body
2.5mm diameter object test tool is completely inaccessible
Into the shell
13.2
Prevents the diameter of not less than 1.0mm
Solid foreign body
1.0mm diameter object test tool is completely inaccessible
Into the shell
13.2
5 Dust prevention
Cannot completely prevent the entry of dust but enter the ash
The amount of dust must not affect the normal operation of the equipment.
Affect security
13.4
13.5
6 dust-free dust into 13.4 and 13.6
a The diameter part of the object tester must not enter the opening of the housing.
6 Protection level to prevent water entry indicated by the second characteristic number
The second characteristic number indicates the degree of protection of the enclosure against harmful effects on the device due to water ingress.
The test of the second characteristic figure was performed with clear water. If the cleaning operation uses a high temperature/high pressure water spray that exceeds the characteristic number 9
(or) Solvents may affect the actual degree of protection.
Table 3 gives a brief description and meaning of the protection level represented by the second feature number. Brief description and meaning not as protection etc.
Level regulations.
See Chapter 14 for the test.
The second feature number is 6 and less than 6 levels, and the level of its identification also indicates that it meets all levels of requirements below this level. So if
The test is clearly applicable to any level below any level, and tests below this level do not have to be carried out.
Only the housing marked with the second characteristic number 9 considers whether it is suitable for water spray (the second characteristic number is 5 or 6) and flooding (second
The bit feature number is 7 or 8), so it is not necessary to meet the requirement for the number 5, 6, 7 or 8, unless there are multiple flags shown below.
The shell passes the following test
Water spray
Second feature number
Short/continuous flooding
Second feature number
Marking and marking application area
5 7 IPX5/IPX7 Multi-use
5 8 IPX5/IPX8 Multi-purpose
6 7 IPX6/IPX7 Multi-use
6 8 IPX6/IPX8 Multi-use
9 7 IPX7/IPX9 Multi-use
9 8 IPX8/IPX9 Multi-use
5 and 9 7 IPX5/IPX7/IPX9 Multi-use
5 and 9 8 IPX5/IPX8/IPX9 Multi-use
6 and 9 7 IPX6/IPX7/IPX9 Multi-use
6 and 9 8 IPX6/IPX8/IPX9 versatile
- 7 IPX7 Restricted
- 8 IPX8 Restricted
9 IPX9 Restricted
5 and 9 - Multi-purpose IPX5/IPX9
6 and 9 - IPX6/IPX9 Multipurpose
"Multi-use" means that the enclosure should meet the requirements for preventing water spray and flooding.
"Restricted" means that the test conditions specified apply only.
Table 3 Degree of protection against entry of water as indicated by the second characteristic number
second
Feature number
Protection level
Brief description meaning
Test conditions see chapter
0 No protection - -
1 It should have no harmful effect to prevent vertical drop of vertical drip. 14.2.1
Prevents the housing from hanging when tilted at 15°
Straight drip
When the vertical plane of the shell is inclined at 15°,
Straight drops should have no harmful effects
14.2.2
3 Waterproof
When the vertical surface of the housing is sprayed within 60°,
No harmful effects
14.2.3
4 splash water to the shell in all directions splash no harmful effects 14.2.4
5 spray water to the shell in all directions without harmful effects 14.2.5
6 Anti-strong water spray
Strong water spray in all directions without harmful
influences
14.2.6
7 Prevent short-term flooding
After immersing in the water under specified pressure for a specified period of time
Shell water intake is not harmful
14.2.7
Table 3 (continued)
second
Feature number
Protection level
Brief description meaning
Test conditions see chapter
8 Preventing continuous flooding
According to the conditions agreed by both the manufacturer and the user (should be
Harder than feature number 7) After continuous dive
Shell water intake is not harmful
14.2.8
9 Effect of high temperature/high pressure water spray
Spray high-temperature/high-pressure water in all directions in the housing.
Harm effect
14.2.9
7 Protection grades indicated by additional letters to prevent access to dangerous parts
Additional letters indicate the degree of protection against human proximity to dangerous parts.
Additional letters are only used for.
--- The actual protection of the approaching dangerous parts is higher than the protection level represented by the first characteristic number;
--- The first characteristic number is replaced by "X" and only indicates the degree of protection against the dangerous parts.
For example, such higher levels of protection are achieved by the baffle, the proper shape of the opening, or the distance to the inner shell components.
Table 4 lists the meanings that can conveniently represent part of a human body or a person's hand-held object and the degree of protection against near-dangerous parts.
Content, these are all represented by additional letters.
Table 4 Protection grades near dangerous parts indicated by additional letters
Additional letter
Protection level
Brief description meaning
Test conditions see chapter
A Prevents the back of the hand from approaching
50mm diameter spherical test instruments and hazardous parts should be
Keep enough clearance
15.2
B Prevent finger close
12mm diameter, 80mm long hinged finger and
Dangerous parts should maintain sufficient clearance
15.2
C Prevent tools from approaching
Diameter 2.5mm, length 100mm test fixture and danger
Parts should maintain sufficient clearance
15.2
D prevents the wire from approaching
Diameter 1.0mm, length 100mm test fixture and danger
Parts should maintain sufficient clearance
15.2
If the enclosure is suitable for levels below a certain level, only that additional letter is required to identify the level. If the test is clearly applicable
At any level below this level, tests below this level do not have to be carried out.
See Chapter 15 for tests.
See Appendix A for examples of IP codes.
8 additional letters
In the relevant product standards, supplemental letters can be used to indicate supplementary content. Supplementary letter placed in the second characteristic number or additional letter
after that.
The content of the supplement should be consistent with the requirements of this standard, and the product standards should clearly state the supplementary requirements for performing this level of testing.
The letter and meaning of the supplementary content are as follows.
The meaning of the letter
H High-voltage equipment
M Waterproof test is carried out when the movable part of the device (such as the rotor of a rotating motor) moves
S Waterproof test is performed when the movable part of the device (such as the rotor of a rotating electric machine) is stationary
W Provide additional protection or treatment to suit the specified climatic conditions
Note. GB 4208-1984 stipulates that W is placed in the same meaning between the IP and the feature number as the W specified in this version is placed after the feature number or additional letter.
Other letters can be used in product standards. In order to avoid the repeated use of supplementary letters, the product standard refers to the requirements of the new letter
B.8.
Without the letters S and M, it means that the degree of protection has nothing to do with the operation of the equipment components. It needs to be tested both when the equipment is running and when it is stationary.
However, if the test can obviously pass under another condition, it is usually sufficient to make a conditional test.
9 Example of identification of IP code
9.1 Unused Selectable IP Codes
IP 3 4
Code letter
First feature number
Second feature number
The enclosure carries the above IP code, where.
(3)--Prevents a person from holding a tool with a diameter of not less than 2.5 mm in proximity to a dangerous part;
--- Prevent solid objects with a diameter of not less than 2.5mm from entering the device housing.
(4)---Prevents harmful effects on the equipment due to splashing in all directions of the housing.
9.2 Using Selectable Alphabetic IP Codes
IP 2 3 CS
Code letter
First feature number
Second feature number
Additional letter
Supplementary letter
The enclosure carries the above IP code, where.
(2)---Prevent humans from approaching dangerous parts with their fingers;
--- Prevent foreign matter with a diameter of 12.5mm or more from entering the housing.
(3)---To prevent the harmful effects of water spray on the equipment in the enclosure.
(C)---Prevents a person from carrying a tool with a diameter of not less than 2.5 mm and a length of not more than 100 mm approaching a dangerous part (the tool should be worn entirely
Over the housing until the stop plate).
(S) - The test to prevent harmful effects of incoming water is carried out when all equipment components are stationary.
10 Signs
The product standards should provide for the requirements of the mark.
For the following cases, the product standard should also make appropriate provisions for the marking method.
--- When the degree of protection of one part of the housing differs from that of the other part;
--- Installation position has an effect on the degree of protection;
--- The maximum diving depth and time must be stated.
11 Test General Requirements
11.1 Environmental Conditions for Waterproof and Dustproof Tests
Unless otherwise specified in the relevant product standards, the test shall be conducted under the standard environmental conditions specified in GB/T 2421.1-2008.
During the test, the recommended environmental conditions are as follows.
Temperature range. 15°C~35°C;
Relative humidity. 25%~75%;
Atmospheric pressure. 86kPa~106kPa (860mbar~1060mbar).
11.2 Sample
The test specified in this standard is a type test.
Unless otherwise specified by product standards, each test sample should be a clean new product. All parts should be in the state specified by the manufacturer
In place.
If the test cannot be performed on the entire equipment, it should be performed with representative parts or with smaller equipment designed in the same proportion.
The relevant product standards should specify the following similar details.
--- Number of samples;
--- Conditions for installation, assembly and positioning of specimens (eg ceiling, floor or wall mounting);
Note. This is also used when the device plan is used with other related devices, such as when the device is used alone or in combination.
--- Preprocessing method (if any);
--- Live test or not;
--- whether or not the part is operating during the test.
If the product standard does not specify the details, it shall be specified by the manufacturer's instructions.
11.3 Application of Test Requirements and Judgment of Test Results
The conditions for acceptance of the tests and general requirements for applications and equipment with drainage holes and vents are regulated by relevant product standards. If none of these
The regulations shall be carried out in accordance with the provisions of this standard.
The judgment of test results is regulated by relevant product standards. If not specified, the acceptance conditions of this standard shall be taken as the minimum requirements.
11.4 Combination of first characteristic digital test conditions
The identification of the first characteristic number means that all test conditions for that number are satisfied.
The test conditions for the first characteristic figure are shown in Table 5.
Table 5 Protection level test conditions represented by the first characteristic number
The first one
Feature number
Protection test
Prevents the approach of dangerous parts solid foreign bodies
0 Does not require test does not require test
1 Balls with a diameter of 50mm must not enter the housing completely and maintain sufficient clearance with live parts
Hinge test finger can enter 80mm long, but should keep enough with live parts
gap
12.5mm diameter ball must not be fully advanced
Into the housing
3 Test bars with a diameter of 2.5 mm must not enter the enclosure and maintain adequate clearance with live parts
4 Test wires with a diameter of 1.0 mm shall not enter the enclosure and maintain adequate clearance with live parts
Test wire with a diameter of 1.0 mm must not enter the enclosure and be connected to live parts
Keep enough clearance
Dust prevention according to Table 2
Test wire with a diameter of 1.0 mm must not enter the enclosure and be connected to live parts
Keep enough clearance
Dust-tightness as specified in Table 2
Note. The first characteristic digits are 1 and 2 and “may not be fully entered” ie the diameter of the ball must not pass through the opening of the housing.
11.5 Empty Shell
If there is no equipment inside the tested shell, the manufacturer of the shell should specify the dangerous part in the specification or it may be caused by foreign matter or water.
The location of the components that affect the impact and the space reserved.
The final assembly plant should be able to ensure that the electrical equipment is encapsulated into the enclosure and meet the requirements of the final product's degree of protection.
12 Tests for the protection of near dangerous parts represented by the first characteristic number
12.1 Test Equipment
See Table 6 for test sets that are close to the protection of hazardous parts.
12.2 Test Conditions
The force to be inserted into or inserted into any opening of the housing (when the first characteristic number is 2 tests) is specified in Table 6.
For the test of low-voltage equipment, an indicator lamp is connected in series between the test equipment and the hazardous part inside the housing, and is provided between 40V~50V.
Safety extra low voltage 1). If the surface of dangerous live parts has a paint film or oxide layer or other similar protection, then test the package
A layer of metal foil is applied and electrically connected to parts that are normally charged during normal operation.
1) From a safety point of view, the power supply voltage of the indicator light connected between the test finger and the charged part inside the shell shall be a safe extra-low voltage, as specified in IEC 60529.1989
The power supply voltage is "extra low voltage between 40V and 50V."
This indicator circuit can also be used for dangerous moving parts of high voltage equipment.
If possible, move the moving parts inside the housing slowly.
12.3 Acceptance Conditions
If there is a sufficient gap between the test tool and the dangerous part, the protection is qualified.
The test with the first characteristic number being 1 shall not allow the test device with a diameter of 50 mm to fully enter the opening.
The test with the first feature number of 2 means that the hinged test finger can enter 80mm long, but the retaining plate (φ50mm×20mm) must not enter
mouth. Starting from the straight-line position, the two contacts of the test finger should bend freely around the axis of the adjacent face within 90°. Should make trials in every one
Possible location activities.
See Appendix A for an example.
In this standard, "adequate clearance" means.
12.3.1 For low voltage equipment (rated voltage. AC not exceeding 1kV, DC not exceeding 1.5kV)
Test equipment cannot touch dangerous live parts.
Table 6 Touch Test Equipment to Prevent People from Approaching Hazardous Parts
The first one
Feature number
Additional
letter
Test equipment
Mm
Test force
1 A 50±5
2 B 10±1
3 C 3±0.3
Table 6 (continued)
The first one
Feature number
Additional
letter
Test equipment
Mm
Test force
4,5,6 D 1±0.1
If sufficient clearance is detected by the indicator circuit between the test fixture and the hazardous component, the indicator light should not be lit during the test.
Note. The highest voltage (the rms or DC value of the operating voltage) generated within certain types of electrical equipment is higher than the rated voltage of the equipment. Product standard
In determining the withstand voltage test voltage and sufficient clearance, the effect of this maximum voltage should be considered.
12.3.2 For High Voltage Equipment (Rated Voltage. AC Exceeds 1kV, DC Over 1.5kV)
When the test equipment is placed in the most unfavorable position, the equipment shall be able to withstand the withstand voltage test applicable to the equipment as stipulated in the relevant product standards.
Inspection can also be determined by observing the size of the gap in the specified air. This gap should ensure that the most unfavorable electric field distribution
Overvoltage test (see IEC 60071-2).
If the enclosure includes several sections with different voltage levels, appropriate acceptance conditions should be determined for each section with sufficient clearance.
Note. The highest voltage (the rms or DC value of the operating voltage) generated within certain types of electrical equipment is higher than the rated voltage of the equipment. Product standard
The impact of this maximum voltage should be considered when determining the voltage of the withstand voltage test and sufficient clearance.
12.3.3 Equipment for Hazardous Mechanical Parts
Test equipment must not touch dangerous mechanical parts.
If sufficient clearance is detected by the indicator circuit between the test fixture and the hazardous component, the indicator light should not illuminate during the test.
13 Test for prevention of entry of solid foreign objects as indicated by the first characteristic number
13.1 Test Methods
The test method and main test conditions are shown in Table 7.
13.2 Test Conditions with the First Characteristic Numbers 1, 2, 3, and 4
The force used to push the object tester into the housing opening is specified in Table 7.
Table 7 Test Method for Preventing Entry of Solid Foreign Matter
The first characteristic digital test method (object test tool and dust box) Test force test conditions see chapter
0 does not require test - -
1 Rigid ball 50N±5N with diameter 50 0.05 0 mm without handles and guards 13.2
2 Rigid balls with a diameter of 12.5 0.20 mm without handles and guards 30N±3N 13.2
Table 7 (continued)
The first characteristic digital test method (object test tool and dust box) Test force test conditions see chapter
3 Rigid-free rods with a diameter of 2.5 0.05 0 mm without burrs on the edges 3N±0.3N 13.2
4 No-burr, rigid steel wire with diameter 1.0 0.05 0 mm 1N±0.1N 13.2
5 Figure 2 Dust box with or without negative pressure - 13.4 and 13.5
6 Figure 2 dust box, plus negative pressure - 13.4 and 13.6
13.3 Acceptance Criteria for the First Feature Number 1, 2, 3, and 4
If the diameter of the test strip in Table 7 does not pass through any openings, the test passes.
Note. The first characterization figures 3 and 4 in Table 7 were used to simulate spherical foreign objects. For the object test tool used for the opening that must be inspected, if the housing
The openings of the openings do not penetrate or are curved. There are doubts about whether the movable spherical objects can enter. You can inspect the drawings or design the inspection office.
Use the channel and push it with the object tester with the specified force.
13.4 Dust proof test with the first characteristic figures 5 and 6
The test should be carried out in a dustproof box. The basic principle is shown in Figure 2. The powder circulating pump in the sealed test chamber can be used to make the talcum powder suspended
Instead of floating other methods. Talc is filtered using a metal square sieve. The wire diameter is 50 μm and the mesh size is 75 μm. Talc powder
The volume is 2kg per cubic meter of test chamber, and the frequency of use shall not exceed 20 times.
Note. The selection of talcum powder should comply with the provisions of human health and safety.
Shell type must be one of the following.
The first type. The atmospheric pressure in the shell during the normal working cycle of the equipment is lower than the ambient atmospheric pressure, for example due to thermal cycling effects.
The second type. The pressure inside the enclosure is the same as the ambient atmospheric pressure.
For the first type of shell.
The test shell was placed in the test box and the pressure inside the shell was kept below atmospheric pressure with a vacuum pump. Vent holes should be connected to holes specially designed for testing.
If there are no specific product standards, this hole should be located close to the vulnerable parts.
If a special hole cannot be provided, the suction pipe should be attached to the cable entry. As there are other holes (such as more cable entries or drains
Holes) These holes should remain in normal use.
The purpose of the test is to use the pressure difference to draw the air inside the box into the tested equipment, the volume of the extracted air is 80 times the volume of the tested shell, and the pumping speed is every hour.
Not more than 60 times the shell volume. The pressure difference must not exceed 2 kPa (20 mbar) in any case, as shown in the pressure gauge in Figure 2.
If the pumping speed is 40 times to 60 times per hour, the test is carried out for 2 hours.
If the maximum pressure difference is 2 kPa (20 mbar) and the evacuation speed is less than 40 times the volume per hour, then 80 times the volume or
The test can only be stopped after 8 hours of pumping.
For the second type of shell.
The tested shell was placed in the test box in its normal working position, but it was not connected to the vacuum pump. Open drain hole under normal conditions, test period
Should remain open. The test lasted 8 hours.
For the above two types of housings, if the entire equipment cannot be placed in the test box for testing, one of the following methods may be used.
a) test each enclosure with a closed section;
b) test with a representative part of the casing, including components (such as doors, vents, fittings, shaft seals, etc.), which should be installed during the test
In place;
c) Test with equipment of the same structure and scaled down.
For the latter two cases, the volume of air drawn from the equipment during the test shall be the same as that specified for the entire equipment.
13.5 Special Conditions with the First Feature Number 5
13.5.1 Test conditions with the first characteristic number 5
In addition to the relevant product standard stipulated enclosure is the second, the enclosure is regarded as the first.
13.5.2 Acceptance Criteria with First Feature Number 5
After the test, observe that the amount of talc and the deposition site, if the same as other dust, are not enough to affect the normal operation or safety of the equipment.
That is, the test is considered to be satisfactory Unless the relevant product standard clearly stipulates special cases, dust shall not be allowed at locations where creepage may occur along the creepage distance.
Deposition.
13.6 Special Conditions with the First Feature Number 6
13.6.1 Test conditions with the first characteristic number 6
No matter if the pressure inside the shell is reduced below atmospheric pressure, it is considered as the first shell.
13.6.2 Acceptance Criteria for First Feature Number 6
After the test, there is no obvious dust deposition in the shell, which means that the test is qualified.
14 Tests to prevent water entry indicated by the second characteristic number
14.1 Test Methods
The test method and main test conditions are shown in Table 8.
Table 8 Waterproof test methods and main test conditions
second
Feature number
Test method Water flow test duration
Test conditions
See section
0 No need to test - - -
Related standard: GB/T 4026-2019    GB 4706.109-2013
Related PDF sample: GB 4706.39-1997    GB/T 13869-2017