JB/T 831-1991 Tropical power transformers, transformers, voltage regulators, reactors
Some standard content:
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JB
Pressing Machinery Ring Industry Standard JB/T8311991
1991-08-284
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1992-07-01
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1 Question content and avoidance standards
JB/T831±1991
JB83179||tt| |This standard specifies the environmental conditions, technical requirements, test methods, inspection rules, marking, packaging and storage of tropical power transformers, transformers, voltage regulators and reactors.
This standard applies to oil-immersed and dry-type power transformers, transformers, voltage regulators, and reactors used in power systems in tropical areas (hereinafter referred to as tropical transformer products). Special transformers used in tropical areas may refer to this standard. This standard does not apply to power transformer products working under other environmental conditions in tropical areas (chemical industry, marine, mining, etc.). Anything not specified in this standard shall comply with the provisions of the corresponding transformer product standards. 2 Referenced standards
GB 311.1~311.6
Insulation coordination of high-voltage power transmission and transformation equipment High-voltage test technology GB1094.1~1094.5 Power transformer
GB1207
GB1208|| tt||GB2423.4
GB2423.16
GB2423.17
GB2423.37
GB 2424.2
GB2900.1
GB2900.15
GB4208
GB4796
GB6450
Voltage transformer
Current transformer
Basic environmental testing procedures for electrical and electronic products Db, alternating damp heat test method Basic Environmental Testing Procedures for Electrical and Electronic Products Test J, long-term covering test method Test Ke, salt spray test method
Basic Environmental Testing Procedures for Electrical and Electronic Products Basic Environmental Testing Procedures for Electrical and Electronic Products Test L, Sand and Dust Test Methods
Damp and Heat Test Guidelines
Basic Environmental Testing Procedures for Electrical and Electronic Products Electrical Terminology Basic Terminology
Electrical Terminology Transformers, Transformers, Voltage Regulators, Reactors Classification of shell protection levels
Classification of environmental parameters of electrical and electronic products and their severity classification Dry-type power transformers
Technical parameters and requirements for three-phase oil-immersed power transformers GB6451.1~6451.5||tt| |GB7328bZxz.net
GB10228
GB10299
ZBK41003
ZB K41 005
ZBK42 C01
JB842
JB3837||tt ||JB4159
Transformer and reactor sound level determination
Three-phase air self-cooling dry-type power transformer technical conditions reactor
Three-phase resin insulated dry-type transformer technical parameters and requirements 6 ~220kV transformer sound level
Voltage regulator
Packaging technical conditions for tropical electrical products
Methods for preparing model numbers for transformer products
General technical requirements for tropical electrical products||tt ||1991-08-28rat
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1992-07-01
3 Product model, climate protection type and special number JB/T8311991
3.1 Tropical transformer Product climate protection type and symbol a, humid tropical type "TH"
b. Dry tropical type "TA",
C. Dry and wet heat type (i.e. universal type for wet and dry heat) "T" 3.2 tropical transformer product model should comply with the regulations of JB3837, and a protection type symbol should be added after the product model. For example, (only power transformer products are cited)
Three-phase, sprinkler, "self-cooling" double winding non-excitation voltage regulation, copper wire, 100kV·A, 6kV humid tropical power transformer product type is: S- -100/6TH
4 Environmental conditions for use
The environmental conditions for use of three types of climate protection tropical transformer products are in accordance with the provisions of JB4159 5 Technical requirements
5.1 Tropical transformer products The temperature rise limit of tropical transformer products should be specified in accordance with the corresponding standards for transformer products. Humid heat type products should be reduced by 5K on the basis of the corresponding standards, dry tropical type products should be reduced by 10K, and dry and wet heat type products should be reduced by 10K. . 5.2 The shell protection level of tropical transformer products should comply with the IP2X requirements in GB4208. 5.3 When the altitude of the installation location exceeds 1000m, the correction of the temperature rise service value should comply with the requirements of the corresponding transformer product standards. 5.4 The electrical insulation level of tropical transformer products should specifically comply with the relevant regulations of GB311.1~311.6. If the user has special requirements, both parties can negotiate.
5.5 The structural design, material selection and manufacturing process of tropical transformer products must meet the requirements of tropical climates. Humid-heat products must meet moisture-proof requirements, exposed insulating parts must meet mildew-proof requirements, and electroplated parts must meet salt-spray-proof requirements. According to the requirements, dry heat products must meet the requirements of sand and dust prevention.
5.6 General structural requirements for tropical transformer products 5.6.1 Oil protection measures for tropical oil-immersed transformer products can be equipped with an oil conservator or a fully sealed structure (nitrogen filled or not). When an oil conservator is used, it should be equipped with a moisture absorber using color-changing silica gel or other effective moisture absorbers. The end of the oil conservator should be equipped with a sprinkler level gauge, and the oil level lines corresponding to the oil temperatures of -5°C, +30°C and +50°C when the product is not put into operation should be marked.
The volume of the oil conservator or the upper space of the oil tank without oil conservator should ensure that when the ambient temperature is -5℃ and the product is not put into operation, the oil level should be displayed by the filling level gauge. When the ambient temperature is +50°C, the oil will not overflow when the product is fully loaded. 5.6.2 The lead bushings of tropical outdoor transformer products should be antifouling or reinforced. 5.6.3 The surface of metal painted parts of wet-heat transformer products should be smooth and have good moisture-proof performance, and the paint film should have good adhesion. Nameplates and signs should be painted evenly, with clear writing, strong and durable. 5.6.4 Tropical transformer products should have reliable grounding devices that can prevent loosening, and their connection surfaces should have a solid conductive anti-rust layer. 5.6.5 The protection levels of various operating mechanisms of tropical transformer products for outdoor use, Should comply with the requirements of IP5-4 in GB4208. 5.7 Selection of materials for tropical transformer products 5.7.1 The nameplate or label of tropical transformer products should comply with the requirements of Article 2.7 of JB8. The selection of materials should be in accordance with the requirements of Appendix "A* of JB8. When immersed in oil, it should Resistant to transformer oil. 5.7.2 When selecting metal materials and protective layers for wet-heat transformer products, the impact of contact corrosion of different metals should be considered, and the material selection principles and protection methods should comply with the provisions of JB4159 2
JB. /T8311991
5.7.3 For tropical oil-immersed transformer products, seals should be made of rubber that is resistant to transformer oil, high temperature, and resistant to sunlight during long-term operation
5.8 The technical performance of supporting components of tropical transformer products should not only comply with the technical standards of the corresponding transformer products, but also comply with the provisions of this standard
5.9 The damp heat test of moist heat transformer products shall be in accordance with GB2423.4. According to the regulations, after 12 cycles of damp heat tests, Yu-type transformers (oil-immersed transformers, do typical component tests) should meet the following requirements. 59.1 When performing alternating damp heat tests on moist heat type or dry and wet heat combined types, at the end During the testing phase, the insulation resistance, power frequency withstand voltage, and induction withstand voltage tests of the product should be conducted under the following different conditions: 5.9.1.1 For products used in places without air-conditioning facilities, the above tests should be conducted at low temperature and high humidity in the last cycle of the damp and heat test. After the stage is stable for 4 hours, it is carried out in the test chamber (room). If the test conditions are limited, the product can be moved outside the room (room), but the test time shall not exceed 30 minutes. 5.9.1.2 When used in places with air-conditioning facilities. For products, the above test can be tested after recovery under normal atmospheric conditions (recovery time is 6300kV, 1~2h for products A and below, 2~4h for products 8000kV·A and above). 5.9.1.3 Power frequency withstand voltage and induction resistance. For the voltage test, the applied voltage should be 85% of the standard value of the corresponding transformer product (due to test conditions, the induction withstand voltage test can be completed within 6 hours). 5.9.2 After the damp heat test, insulating parts and thermoplastic parts shall not have any defects. Defects such as deformation, cracks, and stickiness 5.9.3. After the damp heat test, the appearance and adhesion of electroplated parts, chemically treated parts and paint layers, and the appearance of plastic parts should meet the Level 2 requirements of the quality grading method specified in JB4159.
5.9.4 Exposed insulating parts should have fog resistance. After the mold growth test, it should meet the level 2 requirements for long-term classification specified in GB2423.16.
6 Test methods and inspection rules
6.1 In addition to the test items for tropical transformer products should be consistent with the requirements of the corresponding transformer products, the following artificial simulated environment test items should also be added to the type test items. :
6.1.1 Moist heat products
a. The damp heat test shall be carried out in accordance with the provisions of GB2423.4. b. The longberry test of exposed insulating parts is carried out in accordance with the provisions of GB2423.16. The test period is 28 days, and inspection is carried out immediately after the test.
c, the salt spray test of electroplated parts is carried out in accordance with the provisions of GB242317, and the test time is in accordance with the provisions of JB4159. d. Waterproof test shall be carried out in accordance with the provisions of GB4208. 6.1.2 The sand and dust resistance test of dry-heat products shall be carried out in accordance with the provisions of GB2423.37. 6.1.3 For moist heat type products: test items required for moist heat type and dry heat type products. 6.2 Tropical transformer products must undergo artificial simulated environment testing under any of the following conditions. a. When new products are trial-produced
b, when product structure, process methods and materials used are changed c. When products that are not frequently produced are produced again after an interval of more than two years (no shell protection test is performed) d. Products produced in batches are subject to regular spot inspections, and the number of pieces is checked. The period is consistent with the type test cycle of the corresponding transformer products. (Shell protection test is not performed.) The artificial simulated environment test should be carried out on the basis of the corresponding transformer product passing the test. Those that pass the artificial simulated environment test must be repaired before leaving the factory. 6.3 For the artificial simulated environment test of tropical transformer products, it is allowed to select a representative product from a series of products with the same structure, same material, and same process.
7 Marking, packaging and storage
7,1 The mark on the nameplate of tropical transformer products is the same as that of the corresponding transformer product. The model on the nameplate should be added with the climate protection type code 3
"TH\"TA" or "T".
JB/T8311991
7.2. The packaging of transformer products used indoors in the tropics should comply with the provisions of JB842, oil-immersed transformers for tropical use The packaging of these products is the same as that of the corresponding transformer products. If the user has special requirements, they should be mentioned when ordering. 7. Packaged tropical transformer products, except for outdoor products, should be stored in a covered warehouse. There must be no corrosive and harmful gases.
This standard is proposed by Shenyang Transformer Research Institute of the Ministry of Mechanical and Electronic Industry. This standard is under the jurisdiction of Shenyang Transformer Research Institute. Drafting. 4
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