GB 1000.1-1988 Technical requirements for pin-type porcelain insulators for high-voltage lines GB1000.1-1988 Standard download and decompression password: www.bzxz.net

National Standard of the People's Republic of China
Pin insulators of ceramic materialfor high voltage overhead linesTechnical specifications
1 Subject content and scope of application
GB1000.1-88
Replaces part of GB1000---81
This standard specifies the technical requirements for pin insulators for high voltage lines and the conditions for testing the characteristic parameters in these technical requirements, the inspection methods, marking and packaging.
This standard applies to pin insulators (hereinafter referred to as insulators) used for insulation and supporting conductors in high voltage overhead power lines in ordinary areas and pollution-prone areas with a nominal voltage of less than or equal to 35kV, a frequency not exceeding 100Hz, and an altitude not exceeding 1000m in three-phase power systems. The ambient temperature at the installation site of the insulator is between -40 and +40℃. This standard does not apply to insulators used in environments with severe corrosion to the enamel and zinc layer of the insulator. 2 Reference standards
Electrical terminology Insulator
GB772 Technical conditions for porcelain parts of high-voltage insulators
GB5958
GB3970
General technical conditions for hot-dip galvanized layer of metal accessories of insulators Power and communication line pin insulators Steel feet Portland cement, ordinary Portland cement
JB3384
3 Terms
Insulator test methods Part 1: General test methods Insulator test methods
Part 2: Electrical test methods
Insulator test methods Part 3: Mechanical test methods High-voltage insulator sampling plan
The definitions of terms used in this standard shall be in accordance with the provisions of GB2900.8. 4 Technical requirements
4.1 Insulators shall be manufactured in accordance with this standard and the technical conditions and drawings approved in accordance with the prescribed procedures. 4.2 The deviation of the main dimensions of the insulator shall comply with the following provisions, and the deviation of other dimensions of the porcelain parts shall comply with the corresponding provisions of GB772. Total height and umbrella diameter of the porcelain parts: ±(0.04d+4.0)mm Minimum nominal creepage distance:
400 ±(not more than +1.5)m
Approved by the Ministry of Machinery and Electronics Industry of the People's Republic of China on August 10, 1988, and implemented on July 1, 1989
GB1000.188
When d>00mm: ±(not more than +6)m
Where d--measured dimension, mm.
4.3 The appearance quality of the insulator porcelain parts shall comply with the provisions of GB772. The exposed surface of the insulator porcelain parts shall be evenly covered with a layer of porcelain glaze. 4.4 The cross section of the insulator porcelain parts shall be homogeneous and free of pores, and there shall be no penetration after the porosity test. The pressure of the porosity test shall not be less than 20×10°Pa, and the product of pressure and time (h) shall not be less than 180×10°Pa·h. 4.5 The steel feet for insulators shall comply with the relevant provisions of GB3970, and their galvanized layer shall comply with the relevant provisions of GB5958. The thread size and dimensional tolerance of the steel head or lead head on the insulator screw sleeve and the steel foot shall comply with the requirements of the special thread gauge specified in Appendix A of this standard.
4.6 Insulators shall be glued with an adhesive made of ordinary silicate cement of No. 425 specified in GB175. The contact part of porcelain parts and metal accessories with cement shall be evenly coated with a buffer layer. The top of the glued steel foot and the top of the inner hole of the screw sleeve shall be padded with a buffer pad. The exposed cement surface shall be flat, with a flatness of no more than 3mm and no cracks. The porcelain parts, steel feet and screw sleeves of the insulators should be on the same axis and should not be obviously skewed. After consultation between the supply and demand parties, a "standard sample" should be selected for comparison and inspection.
4.7 The insulator should be able to withstand the power frequency spark voltage test without breakdown or damage. The test time is 5 minutes continuously. 4.8 The insulator should be able to withstand three temperature cycle tests without damage. The test temperature difference is 70K. 4.9 In addition to complying with the above provisions of this standard, the dimensions and characteristics of the insulators should include the following items, and the specific parameters should comply with the provisions of the corresponding product standards.
Main dimensions of insulators;
Lightning full-wave impulse withstand voltage;
1min power wet withstand voltage;
Power frequency breakdown voltage;
Insulator bending withstand load;
Insulator porcelain component destruction load.
Within two years from the date of delivery (i.e. the date on which the supplier issues the notice of delivery), under the conditions of compliance with this standard and the transportation, storage and installation regulations approved in accordance with the prescribed procedures, if the purchaser finds that the insulator does not meet the requirements of this standard, the supplier must replace it free of charge. 5 Inspection rules and test methods
5.1 Insulators shall be inspected by the supplier's quality inspection department, and the supplier shall ensure that the insulators leaving the factory meet the requirements of this standard. 5.2 Insulators shall be inspected in batches. Insulators of the same model made by the same process method are counted as a batch, and the number N of each batch shall not exceed 3200.
5.3 Insulator inspection is divided into individual tests, sampling tests and type tests, and the test methods shall comply with the provisions of GB775.1~.3 and GB5958 respectively.
5.3.1 Individual tests: Insulators shall be inspected one by one according to the provisions of Table 1. If any of the requirements specified in Table 1 are found to be inconsistent, the insulator shall be deemed unqualified.
Table 1 full
Test items for insulators
Test name
Appearance inspection
Power frequency spark voltage test
Test basis
Article 4.3, 4.5.4.6 of this standard
Article 4.7 of this standard
Test method
5.3.2, Sampling test: After the sampling test is qualified one by one, the samples shall be randomly selected according to the number of samples specified in Table 2. The sampling test adopts the counting secondary sampling plan specified in JB3384. GB1000.1—88
During the test, if only one sample fails any item in Table 2, the test shall be continued to be completed, and a new sample shall be selected for supplementary test. If there is another sample that fails in this item (except item 1) or one sample in other items (item 6 failure counts as one) fails in the test, then the batch of insulators are all unqualified. However, if only item 1 fails, only item 1 shall be doubled for repeated testing. If it still fails, it is allowed to be selected one by one. For the test of item 6, the sampling number shall be as specified in Table 2, and its inspection rules and judgment criteria shall comply with the provisions of GB5958. After all the tests are completed, if only one sample fails in total, repeat the test according to the following three situations: If only any one of items 2, 5, and 6 in Table 2 fails, only the unqualified item shall be doubled for repeated testing. If a.
repeated test fails, then the batch of insulators is unqualified. Table 2 Insulator sampling test items
Number of test pieces (pieces)
N≤1200
Test name
Dimension inspection
Temperature cycle test
Insulator bending endurance
Load test
Test basis
N=1201~3200
Test method
Total number of test pieces
Article 4.1, 4.2,
4.6 and 4.9 a of this standard
Article 4.8 of this standard
Article 4.1 of this standard Item e of Article 4.9 of this standard
Power frequency breakdown voltage testItem d of Article 4.9 of this standardPorosity testbzxz.net
Zinc layer test
Article 4.4 of this standard
Article 4.5 of this standard
After the second test
After the second test
After the third testPorcelain block
GB5958
If the third item fails, the second and the first item should be repeated according to twice the number of samples. If the repeated test fails, the batch of insulators fails. However, if the third item is purely due to the failure of the steel foot strength in the first test, only the repeated test should be carried out according to twice the number of samples. If the repeated test fails, the batch of insulators fails. C
If item 4 fails, item 2 and item 3 shall be repeated for twice the number of samples tested in this item. If the repeated tests fail, the batch of insulators shall fail.
5.3.3 Type test: When a new product is trial-formulated or the structure of a product in normal production is modified, the raw material formula and process method are changed, all items of the type test must be tested, or some items of the type test items must be tested according to the nature of the change. The type test adopts a counting single sampling plan. Its judgment criteria should comply with the provisions of JB3384 and GB5958 respectively. The type test should be carried out according to the provisions of Table 3 after each test is qualified. Item
Dimension inspection
Lightning full-wave impulse withstand voltage test
1min rated wet withstand voltage test
Temperature cycle test
Power frequency breakdown voltage test
Insulator bending withstand load test
Porcelain bending failure load test
Porosity test
Zinc layer test
GB1000.1-88
Table 3 Insulator type test items
Test basis
Article 4.1, 4.2 and 4.9 a of this standard
Article 4.9 b of this standard
Article 4. 9, item c
Article 4.8 of this standard
Article 4.9, item d of this standard
Article 4.9, item e of this standard
Article 4.9, item f of this standard
Article 4.4 of this standard
Article 4.5 of this standard
Number of test pieces
3 after test of item 1
3 after test of item 2
5 after test of item 4
5 after test of item 4
5 after test of item 4
5 after test of item 6
When testing, even one insulator fails to meet any of the requirements specified in Table 3, the type test shall be deemed unqualified. Test method
Article 5.4
of this standard and GB775.2
Article 5.4
of this standard and GB775.2
GB5958
5.4 Electrical performance test method: When conducting the lightning full-wave impulse withstand voltage test and the power frequency wet withstand voltage test of the insulator, the test sample should be installed on the simulated iron cross arm, and the iron cross arm is made of angle steel with a width of 75 to 100 mm and a length of not less than 1m. The test sample is fixed in the middle of the angle steel and grounded with a metal guide rod with a diameter of about 2.5mm and a length of not less than 1.5m, the middle of which is tied to the side wire duct of the test sample as a high-voltage electrode. The guide rod should be placed horizontally and at 90° with the angle steel. The distance between the grounded angle steel and the ground and the distance between the test sample and the high-voltage electrode and foreign objects should be not less than 1m. The test method is in accordance with GB775.2. 6 Packaging and marking
6.1 The packaging of insulators must ensure that they will not be damaged during transportation due to poor packaging. The manufacturer's trademark, insulator model and manufacturing year should be clearly and firmly marked on the insulator porcelain parts according to the positions specified in the drawings. Each batch of insulators provided should be accompanied by a product inspection certificate. 6.3 The insulator packaging should be marked with:
Manufacturer name;
Insulator model;
Number of insulators;
Total weight of the packaging;
"Handle with care", "Porcelain" or instructions. SE
No. 1 dimension
a No. 1 ring gauge for steel head thread
GB1000.1-88
Appendix A
Thread gauge for insulator screw insert, steel head and lead head (supplement)
Tooth profile finish
5. 08 ± 0. 02
(Enlarged tooth profile)
b No. 1 plug gauge for screw insert thread
Figure A1 No. 1 gauge for insulator steel foot steel head and screw insert thread Note: ① The tolerance of the specified size is ±0.2mm. ②c is the bottom size of the oblique cone frustum of the measuring gauge. 90~81
GB1000.1-88
67.437 ± 0. 0254
Figure A2. No. 2 plug gauge for insulator screw thread 998
Tooth type enlargement
Electricity 33.325
GB1000.188
No. 2 ring gauge for insulator steel foot lead thread
GB10001-88
This standard is proposed by the National Technical Committee for Insulator Standardization This standard is drafted and managed by Xi'an Electric Ceramics Research Institute The main drafters of this standard are Ding Jingling, Wei Guangda, Cai Meicheng
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