This standard is modified to adopt IEC 60721-3-5:1997, which is a revision of GB/T 4798.5-1990. This standard classifies the environmental conditions of products installed in ground vehicles but not forming part of the vehicle, with the purpose of classifying the environmental conditions and grading the severity. GB/T 4798.5-2007 Environmental conditions for application of electrical and electronic products Part 5: Ground vehicle use GB/T4798.5-2007 Standard download decompression password: www.bzxz.net
This standard is modified to adopt IEC 60721-3-5:1997, which is a revision of GB/T 4798.5-1990. This standard classifies the environmental conditions of products installed in ground vehicles but not forming part of the vehicle, with the purpose of classifying the environmental conditions and grading the severity.
class="f14" style="padding-top:10px; padding-left:12px; padding-bottom:10px;"> GB/T4798 "Environmental conditions for the application of electric and electronic products" includes:
GB/T4798.1-2005 Environmental conditions for the application of electric and electronic products Part 1: Storage
GB/T4798.2-1996 Environmental conditions for the application of electric and electronic products Transport
GB/T4798.3-2007 Environmental conditions for the application of electric and electronic products Part 3: Stationary use in weather-protected places
GB/T4798.4-2007 Environmental conditions for the application of electric and electronic products Part 4: Stationary use in places without weather protection
GB/T4798.5-2007 Environmental conditions for the application of electric and electronic products Part 5: Use on ground vehicles
GB/T4798.6-1996 Environmental conditions for application of electric and electronic products - Ship use
GB/T4798.7-2007 Environmental conditions for application of electric and electronic products - Part 7: Portable and non-stationary use
GB/T4798.9-1997 Environmental conditions for application of electric and electronic products - Microclimate inside the product
GB/T4798.10-1991 Environmental conditions for application of electric and electronic products Introduction
This part is GB/T4798.5-2007, modified to adopt IEC60721-3-5:1997 "Classification of environmental conditions - Part 3: Classification of groups of environmental parameters and their severity - Section 5: Use on ground vehicles" (English version).
This part is redrafted based on IEC60721-3-5:1997. Appendix D lists the comparison table between the chapter and article numbers of this part and those of IEC60721-3-5:1997.
Taking into account the national conditions of China, this part has been modified when adopting IEC60721-3-5:1997. The technical and editorial differences have been incorporated into the text and marked with vertical lines in the margins of the clauses to which they refer. A list of these technical and editorial differences and their reasons is given in Appendix E for reference.
The main differences between this part and IEC60721-3-5:1997 are as follows:
---Deleted the foreword of IEC60721-3-5;
---Added the foreword of national standards;
---Deleted the definitions in Chapter 3;
---Added 5K3L and 5M4 grades;
---Added Appendix C, Appendix D and Appendix E.
This part is a revision of GB/T4798.5-1987. Compared with the old version, the main differences are as follows:
--- Delete the terms in Chapter 2;
--- Change the 5K3C grade to the 5K3L grade;
--- Add Table 1A Special Climate Conditions;
--- Add 5K5 and 5K6 grades in Table 1;
--- The upper and lower limits of the frequency of type I and II spectra in the typical impact response spectrum are extended; ---
Appendix A is changed from a supplement to an informative appendix, and method B in Appendix C of the old version of the standard is deleted;
--- Add Appendix B, Appendix D and Appendix E, and replace the original Appendix B with Appendix C.
GB/T4798 is one of the series of standards for environmental conditions of electrical and electronic products. The following lists the expected structure of these national standards and their corresponding international standards and replaced national standards.
a) GB/T4796-2001 Classification of environmental parameters for electric and electronic products and their severity classification (IEC60721-1:1990, replacing GB/T4796-1984)
b) GB/T4797.1-2005 Natural environmental conditions for electric and electronic products - temperature and humidity (IEC60721-2-1:2002, replacing GB/T4797.1-1984)
c) GB/T4797.2-2005 Natural environmental conditions for electric and electronic products - altitude and air pressure, water depth and water pressure (IEC60721-2-3:1987, replacing GB/T4797.2-1986)
d) GB/T4797.3-1986 Natural environmental conditions for electric and electronic products Biological (IEC60721-2-7)
e) GB/T4797.4-1989 Natural environmental conditions for electric and electronic products Solar radiation and temperature (IEC60721-2-4:2002)
f) GB/T4797.5-1992 Natural environmental conditions for electric and electronic products Precipitation and wind (IEC60721-2-2:1988)
g) GB/T4797.6-1995 Natural environmental conditions for electric and electronic products Dust, sand and salt spray (IEC60721-2-5:1991)
h) GB/T4798.1-2005 i) GB/T4798.2-1996 Environmental conditions for application of electric and electronic products - Transport (IEC60721-3-2:1985
, Amendment 1:1991, Amendment 2:1993) j) GB/T4798.3-2007 Environmental conditions for application of electric and electronic products -
Part 3: Stationary use in weather-protected locations (IEC60721-3-3:2002, Replaces GB/T4798.3-1990) k) GB
/T4798.4-2007 Environmental conditions for application of electric and electronic products - Part 4: Part: Fixed use in places without weather protection (IEC60721-3-4:1995, replacing GB/T4798.4-1990)
l) GB/T4798.5-2007 Environmental conditions for application of electric and electronic products Part 5: Use on ground vehicles (IEC60721-3-5:1997, replacing GB/T4798.5-1987)
m) GB/T4798.6-1996 Environmental conditions for application of electric and electronic products for marine use (IEC60721-3-6:1987, Amendment 1)
n) GB/T 4798.7-2007 Environmental conditions for application of electric and electronic products Part 7: Portable and non-stationary use (IEC60721-3-7:2002, replacing GB/T4798.7-1987)
o) GB/T4798.9-1997 Environmental conditions for application of electric and electronic products Microclimate inside the product (IEC60721-3-9:1993)
p) GB/T4798.10-2006 Introduction to environmental conditions for application of electric and electronic products (IEC60721-3-0:2002, Amendment 1)
q) GB/T11804-2005 Terminology for environmental conditions for application of electric and electronic products (replaces GB/T11804-1989)
Appendices A, B, C, D and E of this part are informative appendices.
This part is proposed by China Electrical Equipment Industry Association.
This part is under the jurisdiction of the National Technical Committee for Standardization of Environmental Conditions and Environmental Testing for Electric and Electronic Products (SAC/TC8).
Drafting units of this part: Standard Metrology Institute of the Ministry of Railways, National Railway Weighing and Weighing Station.
The main drafters of this part are Zhang Yibing, Lu Lin, Qian Yuelei and Li Jianying.
The previous versions of the standards replaced by this part are:
--- GB/T4798.5-1987.

The clauses in the following documents become the clauses of this part through reference in this part of GB/T4798. For all dated referenced documents, all subsequent amendments (excluding errata) or revisions are not applicable to this part. However, the parties to the agreement based on this part are encouraged to study whether the latest versions of these documents can be used. For all undated referenced documents, the latest versions are applicable to this part.
GB/T4796-2001 Classification of environmental parameters for electric and electronic products and their severity classification (idtIEC60721-1-1:1990)
GB/T4797.1-2005 Temperature and humidity of natural environmental conditions for electric and electronic products (IEC60721-2-1:2002, MOD)
GB/T4798.1-2005 Environmental conditions for application of electric and electronic products Part 1 Storage (IEC60721-3-1:1997, MOD)
GB/T4798.2-1996 Environmental conditions for application of electric and electronic products Transport (neqIEC60721-3-2:1985, Amendment 1:1991, Amendment 2:1993)
GB/T4798.10-2006 Introduction to environmental conditions for application of electric and electronic products (IEC60721-3-0:2002, Amendment 1, NEQ)
GB/T11804-2005 Terminology of environmental conditions for electric and electronic products

Foreword I
1 Scope 1
2 Normative references 1
3 General requirements 1
4 Classification of environmental parameter groups and their severity levels 2
Appendix A (Informative Appendix) Description of selected environmental parameters and their severity levels 7
Appendix B (Informative Appendix) Description of environmental conditions in tropical areas specified for levels 5K5 and 5K6 18
Appendix C (Informative Appendix) Comparison table of climate types in national standards and IEC standards 20
Appendix D (Informative Appendix) Comparison of chapter and article numbers in this part with those in IEC60721-3-5:1997 21
Appendix E (Informative Appendix) Technical and editorial differences between this part and IEC60721-3-5:1997 and their causes 22

ICS19.040
National Standard of the People's Republic of China
GB/T4798.5--2007
Replaces GB/T4798.5—1987
Environmental conditions for the application of electric and electronic products
Part 5: Ground vehicle use
Environmental conditions existing in the application of electric and electronic products-Section 5 Ground vehicle installations (IEC60721-3-5:1997, Classification of environmental conditions Part 3: Classification of groups of environmental parameters and their severities--Section 5. Ground vehicle installations,MOD)2007-07-13 Issued
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Standardization Administration of China
2008-03-01 Implementation
GB/T4798.5-2007
Normative references
General requirements
4 Classification of environmental parameter groups and their severity levels
Appendix A (Informative Appendix)
Appendix B (Informative Appendix)
Appendix C (Informative Appendix)
Appendix D (Informative Appendix) Appendix E (Informative Appendix)
Description of the selection of environmental parameters and their severity levels Description of the tropical area environmental conditions specified for levels 5K5 and 5K6 Comparison table of climate types between national standards and IEC standards Comparison of the chapter and article numbers of this part with the chapter and article numbers of IEC60721-3-5.1997. Technical and editorial differences between this part and IEC60721-3-5.1997 and their causes. 18
GB/T4798 "Environmental conditions for the application of electric and electronic products" includes: GB/T4798.1-2005 Environmental conditions for the application of electric and electronic products Part 1 ：Storage GB/T4798.2-1996
Environmental conditions for application of electric and electronic products Transportation GB/T4798.5—2007
GB/T4798.3—2007Environmental conditions for application of electric and electronic products Part 3: Fixed use in weather-protected places GB/T4798.4—2007Environmental conditions for application of electric and electronic products Part 4: Fixed use in places without weather protection GB/T4798.5—2007Environmental conditions for application of electric and electronic products Part 5: Use in ground vehicles GB/T4798.6—-1996
Electrical and electronic products Environmental conditions for application of products Environmental conditions for application of marine electric and electronic products Part 7: Portable and non-stationary use GB/T4798.7-2007
GB/T4798.9-1997 Environmental conditions for application of electric and electronic products Microclimate inside the product GB/T4798.10-1991
Environmental conditions for application of electric and electronic products Introduction This part is GB/T4798.5--2007, which is modified to adopt IEC60721-3-5:1997 "Classification of environmental conditions Part 3: Classification of environmental parameter groups and their severity classification Section 5: Use on ground vehicles" (English version). This part is redrafted based on IEC60721-3-5:1997, and a comparison table of the chapter and article numbers of this part and IEC60721-3-5:1997 is listed in Appendix D.
Taking into account the national conditions of my country, this part has made some modifications when adopting IEC60721-3-5:1997. The relevant technical differences and editorial differences have been incorporated into the text and marked with vertical lines in the margins of the clauses they involve. A list of these technical and editorial differences and their reasons is given in Appendix E for reference. The main differences between this part and IEC60721-3-5:1997 are as follows: the foreword of IEC60721-3-5 has been deleted;
- the foreword of the national standard has been added;
- the definitions in Chapter 3 have been deleted;
the grades 5K3L and 5M4 have been added;
Appendix C, Appendix D and Appendix E have been added.
This part is a revision of GB/T4798.5-1987. Compared with the old version, the main differences are as follows: Delete the terminology in Chapter 2;
-Change the 5K3C grade to the 5K3L grade;
Add Table 1A Special climatic conditions:
Add 5K5 and 5K6 grades in Table 1;
-The upper and lower limits of the frequency of the middle and type II spectrum in the typical impact response spectrum are extended; -Appendix A is changed from a supplement to an informative appendix, and Method B in Appendix C of the old version of the standard is deleted; -Appendix B, Appendix D and Appendix E are added, and Appendix C replaces the original Appendix B. GB/T4798 is one of the series of standards for environmental conditions of electrical and electronic products. The following lists the expected structure of these national standards and their corresponding international standards and replaced national standards. a) GB/T4796-2001 Classification of environmental parameters for electric and electronic products and their severity classification (IEC60721-1: 1990, replacing GB/T4796-1984)
b) GB/T4797.1--2005 Natural environmental conditions for electric and electronic products Temperature and humidity (IEC60721-2-1: 2002, replacing GB/T4797.11984)
c) GB/T4797.2-2005 Natural environmental conditions for electric and electronic products Altitude and air pressure, water depth and water pressure (IEC60721-2-GB/T4798.5-2007
3: 1987 replacing GB/T4797.2-1986) GB/T4797.3-1986 Natural environmental conditions for electric and electronic products Biological (I EC60721-2-7)d)
Solar radiation and temperature (IEC60721-2-4:2002) GB/T4797.4--1989
Natural environmental conditions for electric and electronic products
Natural environmental conditions for electric and electronic products Precipitation and wind (IEC60721-2-2:1988) GB/T4797.5—1992
GB/T4797.6—1995Natural environmental conditions for electric and electronic products g)
Dust, sand and salt spray (IEC60721-2-5:1991) GB/T4798.1—2005Environmental conditions for application of electric and electronic products Part 1: Storage (IEC60721-3-1:1997, replaced by GB/T4798.1—1986)
Transport (IEC60721-3-2: 1985, Amendment GB/T4798.2-1996
5 Environmental conditions for application of electric and electronic products
1: 1991, Amendment 2: 1993)
GB/T4798.3-2007 Environmental conditions for application of electric and electronic products (IEC60721-3-3: 2002 replaces GB/T4798.3-1990) k)
GB/T4798.4-2007 Environmental conditions for application of electric and electronic products (IEC60721-3-4: 1995, replaces GB/T4798.4-1990) Part 3: Fixed use in weather-protected places Part 4: Fixed use in non-weather-protected places GB/T4798.5-2007 Electric and electronic products Environmental conditions for the application of products Part 5: Use on ground vehicles (IEC60721-3-1)
5:1997, replacing GB/T4798.5-1987) m) GB/T4798.6-1996 Environmental conditions for the application of electric and electronic products Marine use (IEC60721-3-6:1987, Amendment 1) GB/T4798.7-2007
Environmental conditions for the application of electric and electronic products Part 7 Portable and non-stationary use n)
(IEC60721-3-7:2002, replacing GB/T4798.7-1987) GB/T4798.9-1997
Environmental conditions for the application of electric and electronic products Microclimate inside the product (IEC60721-3-9: o
GB/T4798.10—2006 Introduction to environmental conditions for the application of electric and electronic products (IEC60721-3-0: 2002, Amendment 1) p) || tt || q) GB/T11804—2005 Terminology for environmental conditions for the application of electric and electronic products (replaces GB/T11804—1989) Appendices A, B, C, D and E of this part are informative appendices. This part is proposed by the China Electrical Equipment Industry Association. This part is under the jurisdiction of the National Technical Committee for Environmental Conditions and Environmental Testing for Electric and Electronic Products (SAC/TC8). Drafting units of this part: Standards and Metrology Research Institute of the Ministry of Railways, National Railway Weighing and Weighing Station. The main drafters of this part: Zhang Yibing, Lu Lin, Qian Yuelei, Li Jianying. The previous versions of the standards replaced by this part are: GB/T4798.5—1987.
1 Scope
Environmental conditions for application of electrical and electronic products
Part 5: Use in ground vehicles
GB/T4798.5—2007
This part classifies the environmental conditions for products installed in ground vehicles but not forming part of the vehicle. Such products include: communication systems, taximeters, flow meters for vehicles transporting liquids such as milk and petroleum products, etc. Vehicles where products are permanently or temporarily installed include: road vehicles: station wagons, commercial vehicles, special vehicles, tractors, trailers, motor vehicles, motorcycles, etc.; rail vehicles: locomotives, trams, cranes, etc.; off-road vehicles: four-wheel drive vehicles, tractors, snowplows, etc.; loading and unloading and storage vehicles: forklifts (manual and automatic), luggage carts, etc.; self-propelled machinery: excavators, harvesters, etc. Although this part does not apply to products that form part of the vehicle, the classification of environmental conditions may also apply to interchangeable products, which are installed in the same way in the same part of the vehicle but do not form part of the vehicle. This part only includes severe conditions that are harmful to the product. Storage and transportation conditions are given in GB/T4798.1-2005 and GB/T4798.2-1996. The purpose of this part is to classify environmental conditions and grade their severity. Products installed in ground vehicles will be exposed to the above environmental conditions during use.
This part gives a limited number of environmental condition levels, but covers a wide range of applications. The lowest level covered should be selected based on the environmental conditions of product use. Appendix A gives guidance on use. 2 Normative references
The clauses in the following documents become clauses of this part through reference to this part of GB/T4798. For any dated referenced document, all subsequent amendments (excluding errata) or revisions are not applicable to this part, however, parties to an agreement based on this part are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, the latest version applies to this part.
GB/T4796--2001 Classification of environmental parameters for electric and electronic products and their severity classification (idtIEC60721-1-1: 1990) GB/T4797.1-2005 Temperature and humidity of natural environmental conditions for electric and electronic products (IEC60721-2-1: 2002, MOD) GB/T4798.1-2005 Environmental conditions for application of electric and electronic products Part 1 Storage (IEC60721-3-1: 1997, MOD) GB/T4798.2-1996 Environmental conditions for application of electric and electronic products Transport of pieces (neqIEC60721-3-2: 1985, Amendment 1: 1991, Amendment 2: 1993)
GB/T4798.10-2006 Introduction to environmental conditions for the application of electric and electronic products (IEC60721-3-0: 2002, Amendment 1, NEQ)GB/T11804-2005 Terminology of environmental conditions for electric and electronic products 3 General requirements
This part is used simultaneously with GB/T4798.10-2006; the terms and definitions established in GB/T11804-2005 apply to this part. The degree of extremes specified in this part is unlikely to be exceeded. All specified values ​​are maximum values ​​or limit values. These values ​​may be reached, but will not occur frequently. Different places of use have different probabilities of occurrence for a specific period. This part does not include these situations, but they can be considered as environmental parameters. If necessary, additional provisions can be made. The probability and duration of occurrence are specified in GB/T4798.10-2006. 1
GB/T4798.5-2007
It should be noted that the combination of environmental parameters will increase the effect on the product. This is especially true when high relative humidity is accompanied by biological conditions, chemical and mechanical active substances.
Classification of environmental parameter groups and their severity levels
This part gives limited levels. Climatic conditions (K), special climatic conditions (Z), biological conditions (B), chemically active substances (C), mechanically active substances (S), contaminated liquids (F) and mechanical conditions (M) are shown in Table 1, Table 1A, Table 2, Table 3, Table 4, Table 5 and Table 6 respectively. For a given product, the level combination should consist of a series of environmental condition levels, such as 5K2/5B1/5C3/5S2/5F1/5M2. The basis for these levels is explained in Appendix A, A, 2. Climatic conditions for tropical areas are specified in the 5K5 and 5K6 grades and explained in Appendix B. The lowest grade combination 5K1/5B1/5C1/5S1/5F1/5M1 constitutes the installation conditions for the following products: the products are installed in vehicles designed to operate smoothly under strictly controlled conditions (indoors). The highest grade combination 5K4/5B3/5C3/5S3/5F3/5M3 covers installation in many types of vehicles, including very harsh areas. For some environmental parameters and grades, special grades are given for products installed in the engine compartment. Higher numerical grades usually include lower numerical grades. For some parameters, quantitative severity levels cannot yet be given. For an explanation of the severity levels, see A.3 in Appendix A.
Table 1 Climate condition level
Environmental parameters
Ventilated room (except engine
room) or outdoor
High temperature?
Unventilated indoor high
temperature, except engine
5
Temperature change in engine room, air
air"
Temperature gradually changes,
air/air, except engine
Temperature gradually changes,
air/air, engine
Temperature change in engine room, air
air/water, engine||tt ||room except.d
Temperature changes, air
water, engine
Temperature changes, air
snow, only in engine
compartment
—25/
—40/
—40/
—50/
—25/
—25/
—25/
—65/
—65/
Environmental parameters
Relative humidity without rapid temperature changes, except engine
compartment of vehicles with internal combustion engines|| tt||Relative humidity without rapid temperature changes, engine room of internal combustion engine-driven vehicles, relative humidity with rapid temperature changes, air/air, not near refrigeration, relative humidity with rapid temperature changes, air/air, near refrigeration, air conditioning, absolute humidity with rapid temperature changes under conditions with high moisture content, air/air' low relative humidity Degrees
Low pressure
Ambient air movement
Solar radiation
Heat radiation, except engine
Heat radiation, engine
Water, except rainfall
Table 1 (continued)
—25/
With wet surfaces
a The high temperature of the product surface may be affected by the ambient air temperature given here and the solar radiation. b The high temperature of the product surface may be affected by the ambient air temperature given here and the solar radiation through the window. C Assume that the product moves directly between the two temperatures given. d The low temperature is equivalent to the temperature of tap water.
GB/T4798.52007
—20/
eAssume that the product is only subjected to a sharp drop in temperature (not a sharp rise in temperature). The moisture content values ​​given apply to temperatures down to the dew point. At lower temperatures, the relative humidity can be considered close to 100%.
f70kPa covers the use of the world's countries (altitude of about 3000m). In some restricted use situations, values ​​can be taken from Table 1A. The values ​​given here refer to the spray velocity, not the precipitation. hMore information on the 5K5 (tropical value) and 5K6 (tropical dry) grades is given in Appendix B. 3
GB/T4798.5—2007
Environmental parameters
Low pressure*
Table 1A Special climatic conditions grades
The corresponding altitude of the 5Z1 grade is about 1400m. Table 2 Biological condition level Environmental parameters Environmental parameters Nitrogen dioxide Hydrogen sulfide Nitrogen oxides (expressed as nitrogen dioxide equivalent value) Mold, fungus, etc. Rodents or other animals harmful to the product (excluding termites) 3 Chemically active substance condition level Special conditions Z Rodents or other animals harmful to the product (including termites) Salt spray conditions Solid salt and brine conditions 0.1 (0.05) 0.03 (0.01) Note 1: The values ​​in this table are the maximum values ​​of a daily period exceeding 30 minutes. The values ​​in brackets in the table are… Note 2: The values ​​in the table are average values.
Note 3: For the corresponding values ​​in cm/m2 (at 20°C and 101.3 kPa), see GB/T4796-2001. Table 4
Environmental parameters
Sand (including gravel)
Environmental parameters
Engine oil
Gear oil
mag/(m·h)
Condition level of mechanically active substances
Condition level of polluted liquids
2. 0(0.1)
35(10)
Environmental parameters
Hydraulic oil
Transformer oil
Coolant
Grease
Battery electrolyte
Environmental parameters
Steady-state sinusoidal vibration"
Displacement amplitude
Acceleration amplitude
Frequency range
Stationary random vibration
Acceleration spectral density
Frequency range
Non-steady-state vibration (including
shock)
Shock response spectrum type 1
Acceleration peak a
Shock response spectrum II| |tt||Type acceleration peak a
External object collision
2~99~200
Table 5 (continued)
Table 6 Mechanical condition level
9~200200~500
10~200200~50010200
200~50010~200
GB/T4798.5-—2007
8~200200~5002~88200200~500
200~50010~200
aFor products installed on high internal damping structures, for 5M2 and 5M3 The frequency range can also be limited to 200Hz. b See Figure 1.
200~500www.bzxz.net
c The measured results show acceleration spectrum density values ​​of 3m2/s~50m/s in the frequency range of 2Hz~10Hz, which are not listed in this table. It is hoped that designers and manufacturers will pay necessary attention to them.
d5M4 level is suitable for road vehicles used on bad roads in areas without good highway systems. 5
GB/T4798.5—2007
Example of half-sine pulse duration
Type I spectrum: duration 11ms;
Type II spectrum: duration 6ms. ||tt ||Figure 1 Typical shock response spectrum (maximum shock response spectrum of the first level) 1000
Frequency/Hz
A.1 Overview
Appendix A
(Informative Appendix)
Instructions for selecting environmental parameters and their severity levels GB/T4798.5—2007
This appendix explains the basis for environmental levels, gives instructions for selecting environmental parameters and their severity levels, and explains the environmental conditions covered by each environmental level.
A.2 Description of use sites
For each environmental parameter, various possible use sites that constitute different environmental levels are given and sorted in increasing order of severity. The first column from the left of Tables A.1 to A.6 describes the use sites. The "×" in the vertical column under the level item represents that the corresponding level is applied to the use site, and the first "×" from the left represents the lowest level applicable to the use site. The above procedure for selecting the appropriate environmental level applies to all clauses in this appendix, but A.2.1 contains additional factors for climate types, which should be paid special attention to.
The lowest level of a place of use in a certain climate type can be determined by looking to the right along the row where the first "×" of the climate type and the place of use is located, and the level corresponding to the first "×" in the level column. The climate types specified in GB/T4797.1 are as follows: extreme cold (excluding the center of Antarctica), cold, cold temperature, warm temperature, dry heat, moderate dry heat, extremely dry heat, humid heat, and constant humid heat. The climate types of my country and the corresponding relationship with the climate types of IEC are shown in Appendix C. It should be pointed out that for each single parameter, the place of use corresponding to a certain level does not mean that the level represents the minimum environmental severity of the place of use.
Note: It does not include emergencies. In some cases, the probability of emergencies should be considered. A.2.1 Climate conditions (K)
Table A.1 describes the application list of climate environment parameters and places of use, climate types and climate condition levels. Table A.1 Climate conditions
Climate type
Place of use
Only for use in vehicles with climate protection and heating places, or in heated rooms
Products used after preheating
External installation, in heated rooms
or in unheated rooms, products used before preheating
Ventilated rooms (except engine rooms
) or outdoor high temperatures
Only for use in climate protection and temperature controlled places
In the vehicle
Really cold and warm
XXXXXX
xxxx×/×x
×××××××
5K15K25K3
-25-65
+40+40+40+40+55+55+40
GB/T4798.5—2007
Place of use
Temperature controlled indoor
External installation, only for
climate protected and ventilated
places In vehicles with ventilation, high temperatures in unventilated rooms, except engine rooms. In closed, unventilated rooms. High temperatures in engine rooms. Only in motor-driven vehicles in weather-protected and ventilated locations. In motor-driven vehicles outdoors. In vehicles driven by internal combustion engines. Temperature changes, air/air not subjected to temperature changes in the surrounding air. t||When doors, windows, and lids are open, air can directly enter and be sucked into the room, or outdoor installation, the vehicle moves between warm indoors and cold outdoors, the temperature changes gradually, air/air, engine room, only for vehicles with weather-protected places, air cannot directly enter the room of people, and vehicles that do not move between indoors and outdoors. Vehicles that do not move between warm indoors and cold outdoors, sub-humid heat, Table A.1(continued)
Climate type
Moderately dry
IX/Xx|X
XXXXXXXX
5K15K25K3
None+70+70+70+85+85+70
+60+70+70+70+70+85+85+70
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