This test is divided into two methods. The first method is usually used to simulate the free fall that unpackaged products may experience during transportation. The sample is usually dropped from a specified height onto a specified surface twice in a specified posture. The second method is usually used to simulate the repeated free falls that connectors attached to cables, small remote control devices, etc. may experience during use. Make the test sample fall repeatedly from a specified height onto a specified surface. It is achieved by using suitable equipment, such as (rotating) drums. GB/T 2423.8-1995 Environmental testing for electrical and electronic products Part 2: Test methods Test Ed: Free fall GB/T2423.8-1995 Standard download decompression password: www.bzxz.net

GB/T2423.8--1995
This standard is equivalent to the International Electrotechnical Commission standard IEC68-2-32 (1975 second edition) "Basic Environmental Test Procedure Part 2: Test Method Test Ed: Free Fall", the first revision in 1982 and the second revision in 1990. In this way, this national standard is the same as the international standard to meet the needs of international trade, technology and economic exchanges. This standard replaces GB2423.8-81 "Basic Environmental Test Procedure for Electric and Electronic Products Test Ed: Free Fall Test Method" and GB2424.6-81 "Basic Environmental Test Procedure for Electric and Electronic Products Free Fall Test Guide". GB2423.8--81 and GB2424.6--81 were drafted with reference to IEC68-2-32 (1975 second edition) "Basic Environmental Test Procedure Part 2: Test Method Test Ed: Free Fall". This standard is completely identical to IEC68-2-32 (1975), the first revised text in 1982, and the second revised text in 1990 in terms of technical content, writing format and rules. The main differences between this standard and the previous version are: - GB2423.8 and GB2424.6 are merged into one standard GB/T2423.8; according to the two revisions of IEC68-2-32 in 1982 and 1990, Method 2 and Appendix A are revised, and Appendix B is supplemented. The following four standards and this standard are all in the category of impact test. The relevant specifications should select appropriate test methods according to the specific conditions of product use and transportation (see Appendix B).
GB/T2423.5-1995 Environmental testing for electric and electronic products Part 2: Test methods Test E and guidance: Impact: Environmental testing for electric and electronic products Part 2: Test methods Test Eb and guidance: Collision, -GB/T2423.6-1995
-GB/T2423.7-1995 Environmental testing for electric and electronic products Part 2: Test methods Test Ec and guidance: Falling and tipping over (mainly for equipment type samples), -GB2423.39--90 Basic environmental testing procedures for electric and electronic products Test Ee: Bounce test method. Appendix A and Appendix B of this standard are the appendices of the standard. This standard is proposed by the Ministry of Electronics Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Environmental Conditions and Environmental Testing for Electric and Electronic Products. The units that started this standard are: the First Research Institute of the Ministry of Posts and Telecommunications, and the Fifth Research Institute of the Ministry of Electronics Industry. The main drafters of this standard are: Wang Yuchun, Wei Bei, He Jinkang, Yu Zhanquan, and Wang Shurong. 55
GB/T 2423.8-1995
IEC Before
1) The formal resolutions or agreements of the International Electrotechnical Commission (IEC) on technical issues are developed by technical committees represented by representatives of national committees with special concerns about the issue. They express the international consensus on the issue as much as possible. 2) These resolutions and agreements are provided for international use in the form of recommended standards and are accepted by national committees in this sense. 3) In order to promote international unification, the International Electrotechnical Commission hopes that all national committees will adopt IEC recommended standards as their national standards when national conditions permit. Any differences between IEC recommended standards and corresponding national standards should be clearly stated in national standards as much as possible.
This standard was developed by IEC Technical Committee 50 (Environmental Testing) Subcommittee 50A (Shock and Vibration Testing). The first draft was discussed at the Stockholm Conference in 1972 and formed Document: 50A (Central Office) 138. Submitted to the National Committees for a vote in 1973 under the "six-month rule". The following countries voted explicitly in favor of this standard: Australia, Belgium, Brazil, Czechoslovakia, Denmark, Egypt, Finland, Germany, France, Israel, Japan, Netherlands, Norway, Poland, Portugal, South Africa (Republic), Romania, Spain, Linden, Switzerland, Turkey, USSR, United Kingdom, United States. The first revision was made in 1982, adding the guidelines in Appendix B. The second revision was made in 1990, based on the following documents: Amendment Document No.
Six-month Rule
50A(CO)181
50A(CO)152
For more detailed information, please refer to the ruling reports listed in the table. The second revision updated the contents of the two appendices. 56
Voting report
50A(CO)185
50A(CO)157
February order
50A(CO)186
Voting report
50A(CO)187
National Standard of the People's Republic of China
Environmental testing for electric and electronic products
Part 2: Test methods
Test Ed: Free fall
GB/T2423.8—1995
idt IEC 68-2-32:1990
Replaces GB2423.8—81
GB 2424. 6-81
This test is divided into two methods. The first method is usually used to simulate the free fall that the unpackaged product may experience during transportation. The sample is usually dropped from a specified height onto a specified surface twice in a specified posture. The second method is usually used to simulate the repeated free fall that connectors attached to cables, small remote control devices, etc. may experience during use. Make the test sample drop repeatedly from a specified height onto a specified surface. It is achieved by using suitable equipment, such as (rotating) rollers. Method 1: Free fall
Determine the adaptability of the product to being dropped due to rough handling during transportation, or determine the minimum level of firmness for safety requirements. This test is mainly used for unpackaged test samples and test samples whose packaging can be used as part of the sample in the transport box. 2 Test conditions
2.1 Test surface
The test surface should be a smooth, hard and rigid surface made of concrete or steel. If necessary, the relevant specifications may specify other surfaces. 2.2 Drop height
refers to the height between the test surface and the nearest sample part when the test sample is suspended before falling. 2.3 Release method
The method of releasing the test sample should allow the test sample to fall freely from the suspended position. When releasing, the interference should be minimized. 3 Severity level
The drop height should be selected from the following values: (25), 50, (100), 250. (500), (1000) mm. The values ​​in brackets are preferred values.
Note: Heavy equipment should not be subjected to higher severity levels. 4 Initial inspection
Perform visual inspection, electrical properties and mechanical properties inspection on the samples in accordance with the provisions of relevant specifications. Approved by the State Administration of Technical Supervision on August 29, 1995, and implemented on August 1, 1996
5 Conditional test
GB/T2423.8—1995
5.1 The sample should be allowed to fall freely in the normal posture for transportation and use in accordance with the provisions of the relevant specifications. 5.2 Unless otherwise specified in the relevant specifications, the test sample should fall twice from each specified position. 6 Final test
The test sample should be subjected to visual inspection, electrical properties and mechanical properties tests in accordance with the provisions of the relevant specifications. 7 Contents to be given in the relevant specifications
When the relevant specifications adopt this test, the following details should be given: a) Test surface, if not concrete or rigid (see 2.1); b) Drop height (see Chapter 3);
c) Initial test (see Chapter 4);
d) The posture of the test sample when it starts to fall (see 5.1); e) Number of drops (if not twice) (see 5.2); f) Final test (see Chapter 6).
Method 2: Repeated free fall
8 Purpose
To determine the suitability of cabled component devices, such as connectors and small remote controls, that may be frequently dropped onto hard surfaces for repeated drops.
9 General description
This test method is to drop the test specimen from a specified height onto a hard surface for a specified number of times. In order to simulate actual conditions, each test specimen shall be tested individually and usually with a length of cable. The results of the test shall be evaluated by changes in the mechanical and electrical properties of the test specimen.
10 Description of test equipment
In accordance with the requirements of the relevant specifications, the test equipment shall drop each test specimen from a specified height for a specified number of times. Appendix A Figure A1 illustrates a suitable pattern of equipment using a roller.
11 Severity level
11.1 Number of drops
The relevant specifications shall select the total number of tests from the following values ​​according to the intended use of the test sample: 50, 100, 200, 500, 1000 times.
11.2 Drop height
The drop height is: 500mm.
11.3 Drop frequency
The drop frequency is about ten times per minute.
11.4 Test surface
Unless otherwise specified in the relevant specifications, the test sample shall be dropped on a smooth, hard and firm test surface of a 3mm thick steel plate padded with a wooden board with a thickness between 10mm and 19mm. 58
Initial test
GB/T 2423.8—1995
The test sample shall be subjected to visual inspection, electrical and mechanical performance tests in accordance with the relevant specifications. 13 Conditional test
The test sample shall be placed in the test equipment and subjected to the specified number of drops. When the test sample is equipped with a cable, the relevant specification shall specify the type of cable to be used. If there are no other provisions in the relevant specification, the cable length is 100 mm. 14 Final test
The test sample shall be subjected to visual inspection, electrical and mechanical performance tests in accordance with the requirements of the relevant specifications. The relevant specification shall state the conditions for accepting or rejecting the sample. 15 Contents to be given in the relevant specifications
When the relevant specifications adopt this test, the following details should be given: a) Initial test (see Chapter 12);
b) Number of drops (see 11.1);
c) Final test (see Chapter 14);
d) Type of cable to be connected (see Chapter 13). 59
GB/T2423.8--1995
Appendix A
(Standard Appendix)
Test equipment
A1 Method 2 A suitable form of repeated free fall test equipment is a cylinder that rolls and causes the sample to fall and tumble. When a large number of samples need to be tested, the cylinder may have many compartments, each sample is placed in a compartment, so that the test can be carried out simultaneously. A2 The width W of each compartment is not specified, but it is generally 200mm to 300mm according to the size of the sample. A3 The dimensions of the cylinder are given in Figure A1. Each end is a 3mm thick steel smooth test surface, and the back is lined with a 10mm to 19mm thick wooden board (see 11.4).
The compartment where the sample falls twice is filled with a lint-free rubber wedge with a hardness of 80IRHD ± 20IRHD as specified in ISO48:1979 "Determination of hardness of vulcanized rubber (hardness of 30IRHD to 85IRHD)"; and the sliding surfaces of the compartment are made of smooth and hard plastic sheets.
The roller should be designed so that the shaft does not protrude from the inside of the test sample compartment. The roller should have a small window with a cover, and the window cover is made of transparent polypropylene material. 60
Plastic (laminated) board
*W value see Chapter A2
GB/T 2423.8
The roller body is a 1.5mm thick steel plate.
Figure A1 Schematic diagram of rolling
For fixed end plate
Nominal size unit: mm
B1 Purpose
GB/T 2423.8--1995
Appendix B
(Annex of the standard)
The free fall test is applicable to test samples that may fall from the transport vehicle or work surface during transportation, handling, or maintenance. This test is not applicable to test samples with large weight or volume, such as high-power transformers. B2 Related tests
Test Ea and guidance: Shock (GB/T2423.5, IEC68-2-27) This test simulates the impact of non-repetitive shocks that components and equipment may be subjected to during transportation or use. Test Eb and Guidelines: Collision (GB/T2423.6, IEC68-2-29) This test simulates the effects of repeated collisions that components and equipment may experience during transportation or when installed in various types of vehicles.
Test Ec and Guidelines: Tipping and Overturning (mainly for equipment type samples) (GB/T2423.7, IEC68-2-31) This test is a simple test to evaluate the effects of knocks or impacts that equipment type samples may experience during maintenance work or due to rough handling on the workbench.
Test Ed: Free Fall (GB/T2423.8, IEC68-2-32, Method —) This test is a simple test to simulate the effects of falling that a product may experience due to rough handling. This test is also used to verify the strength level of the product. Www.bzxZ.net
Test Ed: Repeated free fall (GB/T2423.8, IEC86-2-32, Method 2) This test is used to simulate the effects of repeated impacts that certain component-type products, such as connectors in use, may be subjected to. Test Ee: Bounce test method (GB2423.39, IEC68-2-55) This test is used to simulate the effects of random impact conditions that may be experienced when transported as bulk goods on wheeled vehicles on uneven roads.
Impact and collision tests are carried out with the sample fixed on the test bench. When performing the tipping and overturning, free fall, repeated free fall and bounce tests, the sample is not fixed. B3 Test Severity Level Selection (Chapter 3 and Chapter 7 of this standard a), b), d) and e) The compiler of the relevant specification intending to adopt this test should refer to Chapter 7 of this standard to ensure that all the requirements of this clause can be given in the relevant specification.
If possible, the severity of the test applied to the specimens should take into account the handling and transportation conditions to which the specimens may be subjected. However, it is neither practical nor economical to require that all specimens be subjected to the most severe handling (e.g., a drop from an aircraft loading platform or from a crane) that they may be subjected to in the actual environment. When testing specimens required to verify their durability, the choice of drop height should take into account the feasibility of implementation, the degree of damage that can be tolerated, and the conditions of operational use, transportation, and storage. The selection of appropriate test severity levels from Chapter 3 of this standard should take into account the mass of the specimens, the method of handling and transportation, and whether the test is for unpackaged specimens (e.g., subassemblies, components, non-portable equipment) or for specimens shipped in complete shipping containers. In the absence of the above detailed information, the compiler of the relevant specification may select the appropriate severity level from Table B1. Table B1 gives examples of severity levels applicable to various transportation or handling conditions. This table is not mandatory, but the test severity levels listed are typical. It should be remembered that there are situations where the severity levels experienced in actual handling may differ from those listed in the table. 62
Drop height
GB/T2423.8--1995
Table B1 Typical application examples of test severity levels Test sample mass
Unpacked
In complete
transport box
Unpacked test
Sample example
Switch board
Portable case
Small products
Components, small assemblies
Handling method
*Forklift
*Forklift
*Crane
Storage and stacking
Fall from conveyor belt
Fall from workbench, truck
Tail board
*The purpose is to simulate the impact that occurs when a forklift or crane lowers the test sample to the loading and unloading surface, rather than simulating the test sample falling from a truck flatbed or crane hook.3 Drop frequency
The drop frequency is about ten times per minute.
11.4 Test surface
Unless otherwise specified in the relevant specifications, the test sample shall be dropped on a smooth, hard and firm test surface of a 3mm thick steel plate padded with a wooden board with a thickness between 10mm and 19mm. 58
Initial inspection
GB/T 2423.8—1995
The test sample shall be subjected to visual inspection, electrical and mechanical performance tests in accordance with the provisions of the relevant specifications. 13 Conditional test
The test sample shall be placed in the test equipment and subjected to the specified number of drops. When the test sample is equipped with a cable, the relevant specifications shall specify the cable model to be used. If there is no other provision in the relevant specifications, the cable length is 100 mm. 14 Final inspection
The test sample shall be subjected to visual inspection, electrical and mechanical performance tests in accordance with the requirements of the relevant specifications. The relevant specifications shall state the conditions for accepting or rejecting the sample. 15 Contents to be given in the relevant specifications
When the relevant specifications adopt this test, the following details should be given: a) Initial test (see Chapter 12);
b) Number of drops (see 11.1);
c) Final test (see Chapter 14);
d) Type of cable to be connected (see Chapter 13). 59
GB/T2423.8--1995
Appendix A
(Standard Appendix)
Test equipment
A1 Method 2 A suitable form of repeated free fall test equipment is a cylinder that rolls and causes the sample to fall and tumble. When a large number of samples need to be tested, the cylinder may have many compartments, each sample is placed in a compartment, so that the test can be carried out simultaneously. A2 The width W of each compartment is not specified, but it is generally 200mm to 300mm according to the size of the sample. A3 The dimensions of the cylinder are given in Figure A1. Each end is a 3mm thick steel smooth test surface, and the back is lined with a 10mm to 19mm thick wooden board (see 11.4).
The compartment where the sample falls twice is filled with a lint-free rubber wedge with a hardness of 80IRHD ± 20IRHD as specified in ISO48:1979 "Determination of hardness of vulcanized rubber (hardness of 30IRHD to 85IRHD)"; and the sliding surfaces of the compartment are made of smooth and hard plastic sheets.
The roller should be designed so that the shaft does not protrude from the inside of the test sample compartment. The roller should have a small window with a cover, and the window cover is made of transparent polypropylene material. 60
Plastic (laminated) board
*W value see Chapter A2
GB/T 2423.8
The roller body is a 1.5mm thick steel plate.
Figure A1 Schematic diagram of rolling
For fixed end plate
Nominal size unit: mm
B1 Purpose
GB/T 2423.8--1995
Appendix B
(Annex of the standard)
The free fall test is applicable to test samples that may fall from the transport vehicle or work surface during transportation, handling, or maintenance. This test is not applicable to test samples with large weight or volume, such as high-power transformers. B2 Related tests
Test Ea and guidance: Shock (GB/T2423.5, IEC68-2-27) This test simulates the impact of non-repetitive shocks that components and equipment may be subjected to during transportation or use. Test Eb and Guidelines: Collision (GB/T2423.6, IEC68-2-29) This test simulates the effects of repeated collisions that components and equipment may experience during transportation or when installed in various types of vehicles.
Test Ec and Guidelines: Tipping and Overturning (mainly for equipment type samples) (GB/T2423.7, IEC68-2-31) This test is a simple test to evaluate the effects of knocks or impacts that equipment type samples may experience during maintenance work or due to rough handling on the workbench.
Test Ed: Free Fall (GB/T2423.8, IEC68-2-32, Method —) This test is a simple test to simulate the effects of falling that a product may experience due to rough handling. This test is also used to verify the strength level of the product.
Test Ed: Repeated free fall (GB/T2423.8, IEC86-2-32, Method 2) This test is used to simulate the effects of repeated impacts that certain component-type products, such as connectors in use, may be subjected to. Test Ee: Bounce test method (GB2423.39, IEC68-2-55) This test is used to simulate the effects of random impact conditions that may be experienced when transported as bulk goods on wheeled vehicles on uneven roads.
Impact and collision tests are carried out with the sample fixed on the test bench. When performing the tipping and overturning, free fall, repeated free fall and bounce tests, the sample is not fixed. B3 Test Severity Level Selection (Chapter 3 and Chapter 7 of this standard a), b), d) and e) The compiler of the relevant specification intending to adopt this test should refer to Chapter 7 of this standard to ensure that all the requirements of this clause can be given in the relevant specification.
If possible, the severity of the test applied to the specimens should take into account the handling and transportation conditions to which the specimens may be subjected. However, it is neither practical nor economical to require that all specimens be subjected to the most severe handling (e.g., a drop from an aircraft loading platform or from a crane) that they may be subjected to in the actual environment. When testing specimens required to verify their durability, the choice of drop height should take into account the feasibility of implementation, the degree of damage that can be tolerated, and the conditions of operational use, transportation, and storage. The selection of appropriate test severity levels from Chapter 3 of this standard should take into account the mass of the specimens, the method of handling and transportation, and whether the test is for unpackaged specimens (e.g., subassemblies, components, non-portable equipment) or for specimens shipped in complete shipping containers. In the absence of the above detailed information, the compiler of the relevant specification may select the appropriate severity level from Table B1. Table B1 gives examples of severity levels applicable to various transportation or handling conditions. This table is not mandatory, but the test severity levels listed are typical. It should be remembered that there are situations where the severity levels experienced in actual handling may differ from those listed in the table. 62
Drop height
GB/T2423.8--1995
Table B1 Typical application examples of test severity levels Test sample mass
Unpacked
In complete
transport box
Unpacked test
Sample example
Switch board
Portable case
Small products
Components, small assemblies
Handling method
*Forklift
*Forklift
*Crane
Storage and stacking
Fall from conveyor belt
Fall from workbench, truck
Tail board
*The purpose is to simulate the impact that occurs when a forklift or crane lowers the test sample to the loading and unloading surface, rather than simulating the test sample falling from a truck flatbed or crane hook.3 Drop frequency
The drop frequency is about ten times per minute.
11.4 Test surface
Unless otherwise specified in the relevant specifications, the test sample shall be dropped on a smooth, hard and firm test surface of a 3mm thick steel plate padded with a wooden board with a thickness between 10mm and 19mm. 58
Initial inspection
GB/T 2423.8—1995
The test sample shall be subjected to visual inspection, electrical and mechanical performance tests in accordance with the provisions of the relevant specifications. 13 Conditional test
The test sample shall be placed in the test equipment and subjected to the specified number of drops. When the test sample is equipped with a cable, the relevant specifications shall specify the cable model to be used. If there is no other provision in the relevant specifications, the cable length is 100 mm. 14 Final inspection
The test sample shall be subjected to visual inspection, electrical and mechanical performance tests in accordance with the requirements of the relevant specifications. The relevant specifications shall state the conditions for accepting or rejecting the sample. 15 Contents to be given in the relevant specifications
When the relevant specifications adopt this test, the following details should be given: a) Initial test (see Chapter 12);
b) Number of drops (see 11.1);
c) Final test (see Chapter 14);
d) Type of cable to be connected (see Chapter 13). 59
GB/T2423.8--1995
Appendix A
(Standard Appendix)
Test equipment
A1 Method 2 A suitable form of repeated free fall test equipment is a cylinder that rolls and causes the sample to fall and tumble. When a large number of samples need to be tested, the cylinder may have many compartments, each sample is placed in a compartment, so that the test can be carried out simultaneously. A2 The width W of each compartment is not specified, but it is generally 200mm to 300mm according to the size of the sample. A3 The dimensions of the cylinder are given in Figure A1. Each end is a 3mm thick steel smooth test surface, and the back is lined with a 10mm to 19mm thick wooden board (see 11.4).
The compartment where the sample falls twice is filled with a lint-free rubber wedge with a hardness of 80IRHD ± 20IRHD as specified in ISO48:1979 "Determination of hardness of vulcanized rubber (hardness of 30IRHD to 85IRHD)"; and the sliding surfaces of the compartment are made of smooth and hard plastic sheets.
The roller should be designed so that the shaft does not protrude from the inside of the test sample compartment. The roller should have a small window with a cover, and the window cover is made of transparent polypropylene material. 60
Plastic (laminated) board
*W value see Chapter A2
GB/T 2423.8
The roller body is a 1.5mm thick steel plate.
Figure A1 Schematic diagram of rolling
For fixed end plate
Nominal size unit: mm
B1 Purpose
GB/T 2423.8--1995
Appendix B
(Annex of the standard)
The free fall test is applicable to test samples that may fall from the transport vehicle or work surface during transportation, handling, or maintenance. This test is not applicable to test samples with large weight or volume, such as high-power transformers. B2 Related tests
Test Ea and guidance: Shock (GB/T2423.5, IEC68-2-27) This test simulates the impact of non-repetitive shocks that components and equipment may be subjected to during transportation or use. Test Eb and Guidelines: Collision (GB/T2423.6, IEC68-2-29) This test simulates the effects of repeated collisions that components and equipment may experience during transportation or when installed in various types of vehicles.
Test Ec and Guidelines: Tipping and Overturning (mainly for equipment type samples) (GB/T2423.7, IEC68-2-31) This test is a simple test to evaluate the effects of knocks or impacts that equipment type samples may experience during maintenance work or due to rough handling on the workbench.
Test Ed: Free Fall (GB/T2423.8, IEC68-2-32, Method —) This test is a simple test to simulate the effects of falling that a product may experience due to rough handling. This test is also used to verify the strength level of the product.
Test Ed: Repeated free fall (GB/T2423.8, IEC86-2-32, Method 2) This test is used to simulate the effects of repeated impacts that certain component-type products, such as connectors in use, may be subjected to. Test Ee: Bounce test method (GB2423.39, IEC68-2-55) This test is used to simulate the effects of random impact conditions that may be experienced when transported as bulk goods on wheeled vehicles on uneven roads.
Impact and collision tests are carried out with the sample fixed on the test bench. When performing the tipping and overturning, free fall, repeated free fall and bounce tests, the sample is not fixed. B3 Test Severity Level Selection (Chapter 3 and Chapter 7 of this standard a), b), d) and e) The compiler of the relevant specification intending to adopt this test should refer to Chapter 7 of this standard to ensure that all the requirements of this clause can be given in the relevant specification.
If possible, the severity of the test applied to the specimens should take into account the handling and transportation conditions to which the specimens may be subjected. However, it is neither practical nor economical to require that all specimens be subjected to the most severe handling (e.g., a drop from an aircraft loading platform or from a crane) that they may be subjected to in the actual environment. When testing specimens required to verify their durability, the choice of drop height should take into account the feasibility of implementation, the degree of damage that can be tolerated, and the conditions of operational use, transportation, and storage. The selection of appropriate test severity levels from Chapter 3 of this standard should take into account the mass of the specimens, the method of handling and transportation, and whether the test is for unpackaged specimens (e.g., subassemblies, components, non-portable equipment) or for specimens shipped in complete shipping containers. In the absence of the above detailed information, the compiler of the relevant specification may select the appropriate severity level from Table B1. Table B1 gives examples of severity levels applicable to various transportation or handling conditions. This table is not mandatory, but the test severity levels listed are typical. It should be remembered that there are situations where the severity levels experienced in actual handling may differ from those listed in the table. 62
Drop height
GB/T2423.8--1995
Table B1 Typical application examples of test severity levels Test sample mass
Unpacked
In complete
transport box
Unpacked test
Sample example
Switch board
Portable case
Small products
Components, small assemblies
Handling method
*Forklift
*Forklift
*Crane
Storage and stacking
Fall from conveyor belt
Fall from workbench, truck
Tail board
*The purpose is to simulate the impact that occurs when a forklift or crane lowers the test sample to the loading and unloading surface, rather than simulating the test sample falling from a truck flatbed or crane hook.8--1995
Appendix A
(Standard Appendix)
Test Equipment
A1 Method 2 A suitable form of repeated free fall test equipment is a cylinder that rolls and causes the sample to fall and tumble. When a large number of samples need to be tested, the cylinder may have a number of compartments, each sample is placed in a compartment, so that the test can be carried out simultaneously. A2 The width W of each compartment is not specified, but it is generally preferred to take 200mm to 300mm according to the size of the sample. A3 The dimensions of the cylinder are given in Figure A1. Each end is a smooth test surface made of 3mm thick steel, and the back is lined with a wooden board with a thickness of 10mm to 19mm (see 11.4).
In the compartment where the sample falls twice, a lint-free rubber wedge with a hardness of 80IRHD±20IRHD as specified in ISO48:1979 "Determination of hardness of vulcanized rubber (hardness of 30IRHD~85IRHD)" is filled; and the sliding surfaces of the compartment are made of smooth and hard plastic sheets.
The roller should be designed so that the shaft does not protrude from the inside of the test sample compartment. The roller should have a small window with a cover, and the window cover is made of transparent polypropylene material. 60
Plastic (laminated) board
*W value see Chapter A2
GB/T 2423.8
The roller body is a 1.5mm thick steel plate.
Figure A1 Schematic diagram of rolling
For fixed end plate
Nominal size unit: mm
B1 Purpose
GB/T 2423.8--1995
Appendix B
(Annex of the standard)
The free fall test is applicable to test samples that may fall from the transport vehicle or work surface during transportation, handling, or maintenance. This test is not applicable to test samples with large weight or volume, such as high-power transformers. B2 Related tests
Test Ea and guidance: Shock (GB/T2423.5, IEC68-2-27) This test simulates the impact of non-repetitive shocks that components and equipment may be subjected to during transportation or use. Test Eb and Guidelines: Collision (GB/T2423.6, IEC68-2-29) This test simulates the effects of repeated collisions that components and equipment may experience during transportation or when installed in various types of vehicles.
Test Ec and Guidelines: Tipping and Overturning (mainly for equipment type samples) (GB/T2423.7, IEC68-2-31) This test is a simple test to evaluate the effects of knocks or impacts that equipment type samples may experience during maintenance work or due to rough handling on the workbench.
Test Ed: Free Fall (GB/T2423.8, IEC68-2-32, Method —) This test is a simple test to simulate the effects of falling that a product may experience due to rough handling. This test is also used to verify the strength level of the product.
Test Ed: Repeated free fall (GB/T2423.8, IEC86-2-32, Method 2) This test is used to simulate the effects of repeated impacts that certain component-type products, such as connectors in use, may be subjected to. Test Ee: Bounce test method (GB2423.39, IEC68-2-55) This test is used to simulate the effects of random impact conditions that may be experienced when transported as bulk goods on wheeled vehicles on uneven roads.
Impact and collision tests are carried out with the sample fixed on the test bench. When performing the tipping and overturning, free fall, repeated free fall and bounce tests, the sample is not fixed. B3 Test Severity Level Selection (Chapter 3 and Chapter 7 of this standard a), b), d) and e) The compiler of the relevant specification intending to adopt this test should refer to Chapter 7 of this standard to ensure that all the requirements of this clause can be given in the relevant specification.
If possible, the severity of the test applied to the specimens should take into account the handling and transportation conditions to which the specimens may be subjected. However, it is neither practical nor economical to require that all specimens be subjected to the most severe handling (e.g., a drop from an aircraft loading platform or from a crane) that they may be subjected to in the actual environment. When testing specimens required to verify their durability, the choice of drop height should take into account the feasibility of implementation, the degree of damage that can be tolerated, and the conditions of operational use, transportation, and storage. The selection of appropriate test severity levels from Chapter 3 of this standard should take into account the mass of the specimens, the method of handling and transportation, and whether the test is for unpackaged specimens (e.g., subassemblies, components, non-portable equipment) or for specimens shipped in complete shipping containers. In the absence of the above detailed information, the compiler of the relevant specification may select the appropriate severity level from Table B1. Table B1 gives examples of severity levels applicable to various transportation or handling conditions. This table is not mandatory, but the test severity levels listed are typical. It should be remembered that there are situations where the severity levels experienced in actual handling may differ from those listed in the table. 62
Drop height
GB/T2423.8--1995
Table B1 Typical application examples of test severity levels Test sample mass
Unpacked
In complete
transport box
Unpacked test
Sample example
Switch board
Portable case
Small products
Components, small assemblies
Handling method
*Forklift
*Forklift
*Crane
Storage and stacking
Fall from conveyor belt
Fall from workbench, truck
Tail board
*The purpose is to simulate the impact that occurs when a forklift or crane lowers the test sample to the loading and unloading surface, rather than simulating the test sample falling from a truck flatbed or crane hook.8--1995
Appendix A
(Standard Appendix)
Test Equipment
A1 Method 2 A suitable form of repeated free fall test equipment is a cylinder that rolls and causes the sample to fall and tumble. When a large number of samples need to be tested, the cylinder may have a number of compartments, each sample is placed in a compartment, so that the test can be carried out simultaneously. A2 The width W of each compartment is not specified, but it is generally preferred to take 200mm to 300mm according to the size of the sample. A3 The dimensions of the cylinder are given in Figure A1. Each end is a smooth test surface made of 3mm thick steel, and the back is lined with a wooden board with a thickness of 10mm to 19mm (see 11.4).
In the compartment where the sample falls twice, a lint-free rubber wedge with a hardness of 80IRHD±20IRHD as specified in ISO48:1979 "Determination of hardness of vulcanized rubber (hardness of 30IRHD~85IRHD)" is filled; and the sliding surfaces of the compartment are made of smooth and hard plastic sheets.
The roller should be designed so that the shaft does not protrude from the inside of the test sample compartment. The roller should have a small window with a cover, and the window cover is made of transparent polypropylene material. 60
Plastic (laminated) board
*W value see Chapter A2
GB/T 2423.8
The roller body is a 1.5mm thick steel plate.
Figure A1 Schematic diagram of rolling
For fixed end plate
Nominal size unit: mm
B1 Purpose
GB/T 2423.8--1995
Appendix B
(Annex of the standard)
The free fall test is applicable to test samples that may fall from the transport vehicle or work surface during transportation, handling, or maintenance. This test is not applicable to test samples with large weight or volume, such as high-power transformers. B2 Related tests
Test Ea and guidance: Shock (GB/T2423.5, IEC68-2-27) This test simulates the impact of non-repetitive shocks that components and equipment may be subjected to during transportation or use. Test Eb and Guidelines: Collision (GB/T2423.6, IEC68-2-29) This test simulates the effects of repeated collisions that components and equipment may experience during transportation or when installed in various types of vehicles.
Test Ec and Guidelines: Tipping and Overturning (mainly for equipment type samples) (GB/T2423.7, IEC68-2-31) This test is a simple test to evaluate the effects of knocks or impacts that equipment type samples may experience during maintenance work or due to rough handling on the workbench.
Test Ed: Free Fall (GB/T2423.8, IEC68-2-32, Method —) This test is a simple test to simulate the effects of falling that a product may experience due to rough handling. This test is also used to verify the strength level of the product.
Test Ed: Repeated free fall (GB/T2423.8, IEC86-2-32, Method 2) This test is used to simulate the effects of repeated impacts that certain component-type products, such as connectors in use, may be subjected to. Test Ee: Bounce test method (GB2423.39, IEC68-2-55) This test is used to simulate the effects of random impact conditions that may be experienced when transported as bulk goods on wheeled vehicles on uneven roads.
Impact and collision tests are carried out with the sample fixed on the test bench. When performing the tipping and overturning, free fall, repeated free fall and bounce tests, the sample is not fixed. B3 Test Severity Level Selection (Chapter 3 and Chapter 7 of this standard a), b), d) and e) The compiler of the relevant specification intending to adopt this test should refer to Chapter 7 of this standard to ensure that all the requirements of this clause can be given in the relevant specification.
If possible, the severity of the test applied to the specimens should take into account the handling and transportation conditions to which the specimens may be subjected. However, it is neither practical nor economical to require that all specimens be subjected to the most severe handling (e.g., a drop from an aircraft loading platform or from a crane) that they may be subjected to in the actual environment. When testing specimens required to verify their durability, the choice of drop height should take into account the feasibility of implementation, the degree of damage that can be tolerated, and the conditions of operational use, transportation, and storage. The selection of appropriate test severity levels from Chapter 3 of this standard should take into account the mass of the specimens, the method of handling and transportation, and whether the test is for unpackaged specimens (e.g., subassemblies, components, non-portable equipment) or for specimens shipped in complete shipping containers. In the absence of the above detailed information, the compiler of the relevant specification may select the appropriate severity level from Table B1. Table B1 gives examples of severity levels applicable to various transportation or handling conditions. This table is not mandatory, but the test severity levels listed are typical. It should be remembered that there are situations where the severity levels experienced in actual handling may differ from those listed in the table. 62
Drop height
GB/T2423.8--1995
Table B1 Typical application examples of test severity levels Test sample mass
Unpacked
In complete
transport box
Unpacked test
Sample example
Switch board
Portable case
Small products
Components, small assemblies
Handling method
*Forklift
*Forklift
*Crane
Storage and stacking
Fall from conveyor belt
Fall from workbench, truck
Tail board
*The purpose is to simulate the impact that occurs when a forklift or crane lowers the test sample to the loading and unloading surface, rather than simulating the test sample falling from a truck flatbed or crane hook.IEC86-2-32, Method 2) This test is used to simulate the effects of repeated impacts that certain component products, such as connectors in use, may be subjected to. Test Ee: Bounce test method (GB2423.39, IEC68-2-55) This test is used to simulate the effects of random impact conditions that may be experienced when transported as bulk goods on wheeled vehicles on uneven roads.
Impact and collision tests are carried out with the sample fixed on the test bench. For the tipping and overturning, free fall, repeated free fall and bounce tests, the sample is not fixed. B3 Selection of test severity (Chapter 3 and Chapter 7 of this standard a), b), d) and e) The compiler of the relevant specifications intending to use this test should refer to Chapter 7 of this standard to ensure that all the requirements of this clause can be given in the relevant specifications.
If possible, the test severity level applied to the sample should take into account the handling and transportation conditions that the sample may be subjected to. However, it is neither practical nor economical to require that all samples be subjected to the most severe handling they may be subjected to in the actual environment (e.g., falling from an aircraft loading platform or from a crane). When testing samples required to verify their durability, the choice of drop height should take into account the feasibility of implementation, the degree of damage that can be tolerated, and the conditions of operational use, transportation, and storage. The selection of appropriate test severity levels from Chapter 3 of this standard should take into account the mass of the sample, the method of handling and transportation, and whether the test is for unpackaged samples (e.g., sub-units, components, non-portable equipment) or for samples shipped in complete shipping containers. In the absence of the above detailed information, the compiler of the relevant specification may select the appropriate severity level from Table B1. Table B1 gives examples of severity levels applicable to various transportation or handling conditions. This table is not mandatory, but the test severity levels listed are typical. It should be remembered that there are situations where the severity levels encountered in actual handling may be different from those listed in the table. 62
Drop height
GB/T2423.8--1995
Table B1 Typical application examples of test severity levels Test sample mass
Unpacked
In complete
transport box
Unpacked test
Sample example
Switch board
Portable chassis
Small products
Components, small assemblies
Handling method
*Forklift
*Forklift
*Crane
Storage and stacking
Fall from conveyor belt
Fall from workbench, truck
Tail board
*The purpose is to simulate the impact that occurs when a forklift or crane lowers the test sample to the loading and unloading surface, rather than simulating the test sample falling from a truck flatbed or crane hook.IEC86-2-32, Method 2) This test is used to simulate the effects of repeated impacts that certain component products, such as connectors in use, may be subjected to. Test Ee: Bounce test method (GB2423.39, IEC68-2-55) This test is used to simulate the effects of random impact conditions that may be experienced when transported as bulk goods on wheeled vehicles on uneven roads.
Impact and collision tests are carried out with the sample fixed on the test bench. For the tipping and overturning, free fall, repeated free fall and bounce tests, the sample is not fixed. B3 Selection of test severity (Chapter 3 and Chapter 7 of this standard a), b), d) and e) The compiler of the relevant specifications intending to use this test should refer to Chapter 7 of this standard to ensure that all the requirements of this clause can be given in the relevant specifications.
If possible, the test severity level applied to the sample should take into account the handling and transportation conditions that the sample may be subjected to. However, it is neither practical nor economical to require that all samples be subjected to the most severe handling they may be subjected to in the actual environment (e.g., falling from an aircraft loading platform or from a crane). When testing samples required to verify their durability, the choice of drop height should take into account the feasibility of implementation, the degree of damage that can be tolerated, and the conditions of operational use, transportation, and storage. The selection of appropriate test severity levels from Chapter 3 of this standard should take into account the mass of the sample, the method of handling and transportation, and whether the test is for unpackaged samples (e.g., sub-units, components, non-portable equipment) or for samples shipped in complete shipping containers. In the absence of the above detailed information, the compiler of the relevant specification may select the appropriate severity level from Table B1. Table B1 gives examples of severity levels applicable to various transportation or handling conditions. This table is not mandatory, but the test severity levels listed are typical. It should be remembered that there are situations where the severity levels encountered in actual handling may be different from those listed in the table. 62
Drop height
GB/T2423.8--1995
Table B1 Typical application examples of test severity levels Test sample mass
Unpacked
In complete
transport box
Unpacked test
Sample example
Switch board
Portable chassis
Small products
Components, small assemblies
Handling method
*Forklift
*Forklift
*Crane
Storage and stacking
Fall from conveyor belt
Fall from workbench, truck
Tail board
*The purpose is to simulate the impact that occurs when a forklift or crane lowers the test sample to the loading and unloading surface, rather than simulating the test sample falling from a truck flatbed or crane hook.
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.