Some standard content:
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JB
Pressing Machinery Ring Industry Standard of the People's Republic of China JB/T8321998
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1998-05-264
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1/4
1998-12-01鱼
JB/T832±1998
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revision. In terms of writing and expression rules, according to the provisions of GB/T1.1-1993, the content of the original standard has been adjusted and rearranged, and the "Foreword, * Referenced Standards" chapter has been added. The original standard's alternating damp heat test is in accordance with JB839-66 " This standard is carried out in accordance with the provisions of GB/T2423.4-1993 "Basic Environmental Test Procedures for Electrical and Electronic Products Test Db: Alternating Heat Test Method". The test severity level adopts a high temperature of 55°C. Products with different rated voltages adopt different test cycles. The product cycle with rated voltage below 72.5kV is 2d, and the product cycle with rated voltage 72.5kV and above is 6d. The rated power frequency withstand voltage test and Mechanical performance test, the post-test inspection item canceled the "insulation resistance" measurement, and reduced the short-time power frequency withstand voltage value under low temperature and high humidity conditions to 75% of the dry withstand voltage: original standard\mold growth test" project The test is carried out in accordance with JB840-66 Test Method for Toxins in Electrical Products. This standard is tested in accordance with the provisions of GB2423.16-1990 "Basic Environmental Testing Procedures for Electrical and Electronic Products Test J: Mold Growth Test Method", and stipulates the number of test samples, test Period and qualification criteria; This standard adds salt testing items and stipulates the number of test samples, test duration and qualification criteria
This standard will be implemented from December 1, 1998. Effective date, replacing JB832-66. This standard is proposed and centralized by the National High Voltage Switchgear Standardization Technical Committee. This standard was drafted by: Xi'an High Voltage Electrical Equipment Research Institute. The drafter of this standard: Fu Chaowa.
1 range
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JB/T832±1998
JB832E66
This standard is suitable for use in humid tropical areas AC high-voltage circuit breakers, isolating switches, load switches, grounding switches, sectionalizers, reclosers, contactors, metal-enclosed switchgear, gas-insulated enclosed switchgear, with a rated voltage of 3.6KV and above and an operating frequency of 5Hz. High-voltage switchgear such as combination electrical appliances and their operating mechanisms. This standard also applies to AC high-voltage fuses and high-voltage/low-voltage prefabricated substations. In addition to complying with this standard, the high-voltage electrical appliances covered by this standard should also comply with the normal requirements of each product. The provisions of the corresponding standards for use conditions. 2 Reference standards
The provisions contained in the following standards constitute the provisions of this standard by reference in this standard. At the time of publication of the standard, all versions of the standard are valid. Parties using this standard should explore the possibility of using the latest version of the following standards: GB/T 16927.1—1997
GB 11022-1989
GB/T2423.16-1990||tt. ||GB/T2423.4—1993
GB/T2423.17—1993
GB/T 13126—1991
GB/T14092.1—1993
GB/T 14093.1-1993
3
3.1
Procedure
Environmental conditions for use in humid tropical areas
High voltage test technology
Part
General test requirements
General technical conditions for high-voltage switchgear (nejiIEC694:1980) Basic environmental test procedures for electrical and electronic products": Mold growth test method (eqvIEC 68-2-10 1988)|| tt||Test Db: Alternating damp heat test method
Basic Environmental Testing Procedures for Electrical and Electronic Products (eqvIEC68-2-30;1980)
Basic Environmental Testing Procedures for Electrical and Electronic Products Test Ka: Salt Test Methods
(eqvIEC68-2-11:1981)
General technical conditions for protective packaging in humid and hot zones for mechanical industrial products Environmental conditions for moist and hot mechanical products
Environmental technical requirements for mechanical products
For use in hot and humid environments
According to GB/T14092.1, the environmental conditions for use in humid tropical areas are shown in Table 1. Table 1
No.
1
2
3
4
to
Environmental conditions
Annual maximum
Air temperature
Annual minimum
Daily average
Change rate
Maximum temperature when relative humidity ≥95%
Air pressure| |tt||Rainfall intensity
1998-05-26
Use environmental conditions in humid tropical areas
Unit
℃
C/min|| tt||kPa
mm/min
Climately protected place
40
- 5
35
0.5||tt| |28
90
No climate protection place
40
-5, —101
35
0.5
282
90
63\, 15
1998-12-01
1
sequence
number
8
9
10
11
12
13
14
Environmental conditions
Maximum wind speed
Maximum intensity of solar radiation
Condensation
Mold
Salt spray conditions 1)
Thunderstorm
Pests
1) The low temperature in hot and humid areas in China is -10℃. JB/T8321998
Table 1 (End)
Unit
m/s
w/m2
-
A place with climate protection
700
yes
yes
yes
frequent activities
2) refers to the highest value that occurs when the annual maximum relative humidity is less than 95% Temperature: 33℃ is used in hot and humid areas abroad. 3) The rainfall intensity in hot and humid areas in China adopts 6mm/min. 4) Only for areas with salt spray.
3.2 If the operating environment conditions exceed those specified in Table 1, the user shall negotiate with the manufacturer. 4Requirements
4.1 Requirements for materials, structures and processes. No climate protection location
34
1000
Yes
Yes
Yes
Frequent
Frequent activities||tt ||4.1.1 Materials with good moisture-proof, mildew-resistant, and heat-resistant properties should be used. Metal parts should have a good protective layer. 4.1.2 There should be reliable grounding devices. The surfaces of screws and washers used should have good coatings. No corrosion may occur during use. 4.1.3 The conductive fasteners of the product should have a good anti-corrosion protective layer. When copper and aluminum are in direct contact, measures should be taken to prevent galvanic corrosion of copper and aluminum.
4.1.+ The joints of the sealing surface of the product should be waterproof. Under condensation and contamination transfer conditions, the exposed insulation parts of the product should meet the condensation and contamination transfer level requirements of relevant standards. 4.1.5
4.1.6 The components selected for the product should comply with the requirements of the respective humid tropical zone professional standards; those without humid tropical zone professional standards shall be agreed between the user and the manufacturer.
4.1.7 Product signs (including nameplates) should have good moisture-proof, anti-toxic and anti-corrosion properties, clear writing, strong and reliable. 4.2 Products or their parts are subjected to alternating damp heat test according to GB/T2423.4. The test high temperature is 55℃, and the cycle is 2d for products with rated voltage below 72.5kV, and 6d for products with rated voltage of 72.5KV and above. After the test is completed, the inspections specified in 4.2.2 to 4.2.6 shall be carried out as soon as possible, and no treatment shall be performed on the product. 4.2.1 After 6 hours of stabilization in the last low-temperature and high-humidity stage, the product should be able to withstand 75% of the product under normal use conditions, rated power frequency withstand voltage, lasting 1 minute, and there should be no breakdown or flashover during the withstand voltage test. 4.2.2. Measure the main circuit resistance of the product, and its value should meet the technical requirements of the product. 4.2.3 The operating mechanism and auxiliary equipment should comply with the relevant requirements of GB11022, and the operating performance should meet the technical requirements of the product. 4.2.4 The moisture content of the quartz sand inside the sand-filled fuse shall not exceed the product technical conditions. 4.2.5 The sealing performance of the product (such as gas sealing performance, wave body sealing performance) should meet the requirements of product technical conditions. For charging SF. Gas product, its SF. The water content of the gas should meet the requirements of the product technical conditions. 4.2.6 Appearance inspection of the product
a) The appearance of the electroplated and chemically treated parts of the product shall not be lower than the secondary requirements specified in GB/T14093.1; b) The appearance of the paint of the product shall not be lower than that of GB/T14093 Secondary requirements specified in .1, c) Insulating parts and plastic parts shall not have defects such as cracks, stickiness, and deformation that affect product performance. 4.3 The product should have mildew resistance. Exposed organic insulation parts, surface organic coatings and plastic parts must pass the 2
JB/T8321998
mold growth test according to GB/T2423.16 , mold growth should not exceed the secondary requirements. 4.4 The electroplated parts and chemically treated parts of the product should be subjected to salt spray testing in accordance with GB/T2423.17. The test duration and appearance requirements of various coatings should comply with the regulations in GB/T14093.1. 4.5 When outdoor products are exposed to rain with a rainfall of 6mm/min, their power frequency withstand voltage should comply with the product wet withstand voltage test requirements. 4.6 Outdoor products should meet the requirements of GB11022 after rainproof testing under 6mm/min rainfall. 5 Test methods
5.1 Alternating damp heat test
Conducted in accordance with GB/T2423, 4.
5.1.1 The severity level of the test is:
a) High temperature is 55℃
b) Cycle: 2d for products with rated voltage below 72.5kV, rated voltage is 72.5kV Products above are 6d. 5.1.2 Initial inspection items:
a) Rated power frequency withstand voltage test:
b) Mechanical performance test;
c) Appearance inspection.
5.1.3 The test sample is unpackaged, unpowered, and placed in the artificial climate test chamber in working condition, with a height of not less than 0.5m from the ground and a distance of not less than 0.15m from the surrounding area. The test sample is stable for more than 2 hours at 25±3°C and a relative humidity of 45% to 75%. 5.1.4 The lower limit of the relative degree during the cooling phase of each cycle is 85%. 5.1.5 Carry out final inspection according to 4.2.
5.2 Mold growth test
According to the provisions of GB/T2423.16, the test method is Ja, the number of test specimens is three, the test period is 28d, and the inspection is performed according to 4.3 immediately after the test.
5.3 Salt spray test
According to the provisions of GB/T2423.17, the test is conducted on electroplated parts and chemically treated parts, and the number of test samples is three. The test duration and qualification standards shall comply with the provisions of GB/T14093.1. 5.4 Power frequency wet pressure test
The rainfall of the power frequency wet pressure test is 6mm/min, and the test method is conducted according to GB/T16927.1. 5.5 Rainproof test
shall be carried out according to the test method specified in GB11022 under the rainfall specified in 4.6. 6 Inspection Rules
6.1 The type test shall be carried out in accordance with relevant professional standards. After the product has passed the type test under normal use conditions, the type test of tropical products shall be carried out according to this standard.
6.2 The type test of humid zone type products includes the following test items: a) alternating humidity and heat test;
b) mold growth test;
c) salt spray test: ||tt ||d) Power frequency wet pressure test;
e) Rainproof test.
Note: Item c) is only for products in foggy areas: items d) and e) are only for outdoor products. 6.3 The type test of humid zone type products shall be carried out under any of the following circumstances: a) New products:
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b) Products transferred to trial production
JB/T8321998||tt ||c) When changes in product design, process or materials used may affect the performance of the product: d) For mass-produced products, the type test cycle shall be in accordance with the provisions of product standards under normal use conditions. 6.4 When domestic test conditions are not available, the alternating damp heat test is allowed to be performed with product parts or simulations instead. 6.5 The number of test specimens required for the alternating damp heat test is one for three-pole products and two for unipolar products. When parts are used instead of products for testing, at least three of each type of test sample should be used.
6.6 Any parts made of insulating materials that have passed the mold growth test can no longer undergo the mold growth test. 6.7 Judgment of test results
6.7.1 For a series of products with the same structure, same process, and same materials, conduct tests with representative typical specifications. If the test is qualified, the series of products will be considered qualified.
6.7.2 Carry out the test according to 6.2. If there are any unqualified items, the product will be judged as unqualified. 7 Packaging and Storage
7.1 Before packaging, any bare metal that has not been protected by painting or electroplating should be treated with temporary anti-rust measures. 7.2 The packaging of the product should comply with the regulations of GB/T13126. 7.3 Packaged products, except for outdoor products, should be stored in a covered warehouse. There should be no corrosive and harmful gases in the warehouse. Products that still need to be stored after unpacking and inspection should be repackaged according to the original requirements. E
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4The lower limit of the relative degree during the cooling phase of each cycle is 85%. 5.1.5 Carry out final inspection according to 4.2.
5.2 Mold growth test
According to the provisions of GB/T2423.16, the test method is Ja, the number of test specimens is three, the test period is 28d, and the inspection is performed according to 4.3 immediately after the test.
5.3 Salt spray test
According to the provisions of GB/T2423.17, the test is conducted on electroplated parts and chemically treated parts, and the number of test samples is three. The test duration and qualification standards shall comply with the provisions of GB/T14093.1. 5.4 Power frequency wet pressure test
The rainfall of the power frequency wet pressure test is 6mm/min, and the test method is conducted according to GB/T16927.1. 5.5 Rainproof test
shall be carried out according to the test method specified in GB11022 under the rainfall specified in 4.6. 6 Inspection Rules
6.1 The type test shall be carried out in accordance with relevant professional standards. After the product has passed the type test under normal use conditions, the type test of tropical products shall be carried out according to this standard.
6.2 The type test of humid zone type products includes the following test items: a) alternating humidity and heat test;
b) mold growth test;
c) salt spray test: ||tt ||d) Power frequency wet pressure test;
e) Rainproof test.
Note: Item c) is only for products in foggy areas: items d) and e) are only for outdoor products. 6.3 The type test of humid zone type products shall be carried out under any of the following circumstances: a) New products:
4
b) Products transferred to trial production
JB/T8321998||tt ||c) When changes in product design, process or materials used may affect the performance of the product: d) For mass-produced products, the type test cycle shall be in accordance with the provisions of product standards under normal use conditions. 6.4 When domestic test conditions are not available, the alternating damp heat test is allowed to be performed with product parts or simulations instead. 6.5 The number of test specimens required for the alternating damp heat test is one for three-pole products and two for unipolar products. When parts are used instead of products for testing, at least three of each type of test sample should be used.
6.6 Any parts made of insulating materials that have passed the mold growth test can no longer undergo the mold growth test. 6.7 Judgment of test results
6.7.1 For a series of products with the same structure, same process, and same materials, conduct tests with representative typical specifications. If the test is qualified, the series of products will be considered qualified.
6.7.2 Carry out the test according to 6.2. If there are any unqualified items, the product will be judged as unqualified. 7 Packaging and Storage
7.1 Before packaging, any bare metal that has not been protected by painting or electroplating should be treated with temporary anti-rust measures. 7.2 The packaging of the product should comply with the regulations of GB/T13126. 7.3 Packaged products, except for outdoor products, should be stored in a covered warehouse. There should be no corrosive and harmful gases in the warehouse. Products that still need to be stored after unpacking and inspection should be repackaged according to the original requirements. E
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4The lower limit of the relative degree during the cooling phase of each cycle is 85%. 5.1.5 Carry out final inspection according to 4.2.
5.2 Mold growth test
According to the provisions of GB/T2423.16, the test method is Ja, the number of test specimens is three, the test period is 28d, and the inspection is performed according to 4.3 immediately after the test.
5.3 Salt spray test
According to the provisions of GB/T2423.17, the test is conducted on electroplated parts and chemically treated parts, and the number of test samples is three. The test duration and qualification standards shall comply with the provisions of GB/T14093.1. 5.4 Power frequency wet pressure test
The rainfall of the power frequency wet pressure test is 6mm/min, and the test method is conducted according to GB/T16927.1. 5.5 Rainproof test
shall be carried out according to the test method specified in GB11022 under the rainfall specified in 4.6. 6 Inspection Rules
6.1 The type test shall be carried out in accordance with relevant professional standards. After the product has passed the type test under normal use conditions, the type test of tropical products shall be carried out according to this standard.
6.2 The type test of humid zone type products includes the following test items: a) alternating humidity and heat test;
b) mold growth test;
c) salt spray test: ||tt ||d) Power frequency wet pressure test;
e) Rainproof test.
Note: Item c) is only for products in foggy areas: items d) and e) are only for outdoor products. 6.3 The type test of humid zone type products shall be carried out under any of the following circumstances: a) New products:
4
b) Products transferred to trial production
JB/T8321998||tt ||c) When changes in product design, process or materials used may affect the performance of the product: d) For mass-produced products, the type test cycle shall be in accordance with the provisions of product standards under normal use conditions. 6.4 When domestic test conditions are not available, the alternating damp heat test is allowed to be performed with product parts or simulations instead. 6.5 The number of test specimens required for the alternating damp heat test is one for three-pole products and two for unipolar products. When parts are used instead of products for testing, at least three of each type of test sample should be used.
6.6 Any parts made of insulating materials that have passed the mold growth test can no longer undergo the mold growth test. 6.7 Judgment of test results
6.7.1 For a series of products with the same structure, same process, and same materials, conduct tests with representative typical specifications. If the test is qualified, the series of products is deemed to be qualified.
6.7.2 Carry out the test according to 6.2. If there are any unqualified items, the product will be judged as unqualified. 7 Packaging and Storage
7.1 Before packaging, any bare metal that has not been protected by painting or electroplating should be treated with temporary anti-rust measures. 7.2 The packaging of the product should comply with the regulations of GB/T13126. 7.3 Packaged products, except for outdoor products, should be stored in a covered warehouse. There should be no corrosive and harmful gases in the warehouse. Products that still need to be stored after unpacking and inspection should be repackaged according to the original requirements. E
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