This standard specifies the classification system, test methods and conformity assessment of the enclosure protection of relays and their devices. This standard applies to the enclosure protection classification of relays, relay protection and safety automatic devices (including screens, cabinets, tables and boxes) used in power systems. JB/T 7102-1993 Protection grade of enclosure of relays and their devices (IP mark) JB/T7102-1993 Standard download decompression password: www.bzxz.net

JB7102-1993
Releasing and other devices enclosure protection level (IP mark) Machinery Industry Standard of the People's Republic of China
Releasing and other devices enclosure protection level
(IP mark)
1 Subject content and scope of application
JB 7102-1993
This standard specifies the classification system, test methods and conformity assessment of enclosure protection for relays and their devices. This standard applies to the enclosure protection classification of relays, relay protection and safety automatic devices (including screens, cabinets, desks and boxes) used in power systems.
Referenced standards
GB4208 enclosure protection level (IP mark) 3 Protection type
The enclosure protection type specified in this standard includes two types. 3.1 The first protection type
Prevents human body from touching or approaching the live parts or moving parts in the enclosure, and prevents solid foreign matter from entering the enclosure. 3.2 The second type of protection
Prevents water from entering the interior and causing harmful effects. 4 General provisions
4.1 The shell of the product shall comply with the design requirements or the provisions of the relevant product standards. Under normal use conditions, the material and manufacturing process of the shell shall ensure that the requirements of this standard are met. 4.2 Partitions outside the shell and not connected to the shell, as well as barriers such as fences set around the shell specifically for personal safety, are not considered part of the shell. Partitions set inside the shell to prevent solid foreign objects from entering the shell should be considered part of the shell. 4.3 This standard does not specify the protection level under conditions such as mechanical damage, explosive, corrosive gas or moisture (such as caused by condensation), mold, and insect pests.
5 Marking
5.1 The symbol of the protection level consists of the symbol letters IP (International Protection), the first characteristic number, and the second characteristic number. If there is a need for supplementary content, it should also be indicated by supplementary letters, which should be listed after the second characteristic number. 5.2 Meaning of IP mark
1993-10-08·Approved by the Ministry of Machinery Industry
1994-01-01
5.2.1 The first characteristic numeral
JB 7102—1993
Supplementary letters (optional)
The second characteristic numeral
The first characteristic numeral
Marking letters
The first characteristic numeral represents the degree of protection against access to hazardous parts and against solid foreign objects entering the shell, see Table 1. Table 1
The first
_Characteristic numeral
No protection
Protection against the back of the hand
Protection against solid foreign objects with a diameter of not less than 50mml
Protection against fingers
! Protection against solid foreign objects with a diameter of not less than 12mm
Protection against tools
Protection against solid foreign objects with a diameter of not less than 2.5mm
Protection against metal wires
1No special protection
Can prevent the back of the hand from touching the live parts or moving parts inside the shellCan prevent solid foreign objects with a diameter of not less than 50mm from entering the shellCan prevent fingers or similar objects with a length of not less than 80mm from touching the live parts or moving parts inside the shell
Can prevent mm solid foreign objects entering the shell. Can prevent tools, metal wires, etc. with a diameter or thickness of not less than 2.5nmm from touching the live parts or moving parts inside the shell.
Can prevent solid foreign objects with a diameter of not less than 2.5mm from entering the shell. Can prevent tools, metal wires, etc. with a diameter or thickness of not less than 1mm from touching the live parts or moving parts inside the shell.
solid foreign objects with a diameter of not less than 1mm
Second characteristic numeral
live parts or moving parts
Can prevent solid foreign objects with a diameter of not less than 1mm from entering the shell. Can not completely prevent positive dust from entering the shell, but the amount of dust entering is not enough to affect the performance of the product. The second characteristic numeral represents the protection level against water entering the shell and causing harmful effects, see Table 2. Table 2
Second digit
Characteristic numerals
5.2.3 Supplementary letters
No protection
15° drip protection
Water spray protection
Splash protection
Protection level
No special protection
Vertical dripping should have no harmful effect
When the product is tilted within 15° in any direction in the normal position, vertical dripping should have no harmful effect
Water spraying within 60° from the vertical line on all sides should have no harmful effect. Splashing in any direction should have no harmful effect
Test method
and conditions
No test
According to GB4208
Perform according to the provisions of GB4208
Perform according to the provisions of GB4208
Perform according to the provisions of GB4208
Perform according to the provisions of GB4208
Perform according to the provisions of GB4208
Test methods
and conditions
No test
Perform according to the provisions of GB4208
Perform according to the provisions of GB4208
Perform according to the provisions of GB4208
Perform according to the provisions of GB4208
If there is any need to supplement, it should be indicated by a supplementary letter. At this time, the product standard should clearly specify the test requirements that should be added. W: Protection level with additional protective measures or method requirements, used under specified climatic conditions. R: With additional measures or methods required, protection level used under specified dust environment conditions 5.3IP mark example
This P mark on the shell means:
JB 7102-1993
3--Can prevent hand-held tools or metal wires with a diameter or thickness of not less than 2.5mm from touching the live parts or moving parts in the shell: Can prevent solid foreign objects with a diameter of not less than 2.5mm from entering the shell. 4
Can prevent the harmful effects of splashing water from any direction on the product. b. IP20
This IP mark means: Can prevent fingers from touching the live parts or moving parts in the shell, and can also prevent solid foreign objects with a diameter of not less than -12mm from entering the shell. bzxZ.net
c. IP12 W
This IP mark on the shell means:
1 Can prevent the back of the hand from touching the live parts or moving parts in the shell: Can prevent solid foreign objects with a diameter of not less than 50mm from entering the shell. 2—-Can prevent the harmful effects of 15° dripping water on the product. W——Use under specified climatic conditions. 5.4 Marking method of IP mark
5.4.1 The IP mark should be marked on the product nameplate, on the shell or in the corresponding technical documents. Open-type products (such as relay protection, control panel, etc.) do not need to be marked. 5.4.2 When the various parts of the product have different protection levels, the lowest protection level should be marked first; if other parts need to be marked, they should be marked separately according to the protection level of each part. 5.4.3 When the installation method of the product affects its protection level, the intended installation method should be stated in the installation instructions or other documents.
6 Shell protection level (IP mark) of relay professional products 6.1 Shell protection level (IP mark) of relays, relay protection and safety white motion devices (including screens, cabinets, desks, boxes) Table 3. Table 3
Product type
Relay
IP20IP30IP40
IP30IP40IP54
IP30IP40
IP20IP30IP40IP43
6.2 If there are special enclosure protection requirements, they should be selected according to the provisions of GB4208, and other grades should be tested according to the corresponding test methods. 7
Test method
7.1 The tests specified in this standard are type tests, which are carried out when new products are finalized or when the enclosure protection performance is affected by structural changes. 7.2 Environmental conditions for waterproof and dustproof tests
Unless otherwise specified in the relevant product standards, the tests should be carried out under the specified standard environmental conditions. During the test, the recommended environmental conditions are as follows: 427
Ambient temperature: 15~～35℃;
Relative humidity: 25%～75%:
Atmospheric pressure: 86106kPa.
JB7102-1993
7.3Unless otherwise specified, the test samples should be clean new products, and all parts should be installed in place as normal. 7.4Under normal circumstances, the test should be carried out when the product is not powered on. If it is necessary to test when the product is powered on, it should be specified in the corresponding product standards or technical documents. 7.5 For the protection level with the first characteristic numeral of 2 and the second characteristic numerals of 3 and 4, if the visual inspection meets the expected protection level requirements, no further testing is required. However, if there is any doubt, the test should still be carried out in accordance with the provisions of this standard. 7.6 A certain protection level of various types of enclosure protection meets all levels lower than the protection level at the same time. Therefore, any level lower than the protection level does not need to be tested.
7.7 Test of the protection level represented by the first characteristic numeral The test method and qualification assessment of the protection level represented by the first characteristic numeral shall be carried out in accordance with the provisions of GB4208. The probe used for the test of the protection level represented by the first characteristic numeral to prevent human contact with live parts or moving parts in the enclosure shall comply with the provisions of GB4208.
7.8 Test of the protection level represented by the second characteristic numeral The test method and qualification assessment of the protection level represented by the second characteristic numeral shall be carried out in accordance with the provisions of GB4208. Additional remarks:
This standard was proposed and drafted by Xuchang Relay Research Institute of the Ministry of Machinery Industry. This standard was drafted by Xuchang Relay Research Institute of the Ministry of Machinery Industry. The main drafter of this standard: Sun Zhen.
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