GB 1390-1993 Butterfly insulator for high-voltage lines GB1390-1993 Standard download and decompression password: www.bzxz.net

National Standard of the People's Republic of China
Butterfly insulators for high voltage lines
Shackle insulators for high voltage overhead linesGB1390.-93
Replaces GB1390--78
This standard adopts the International Electrotechnical Commission ( Relevant parts of IEC) Publication 383 (1983) "Tests on Porcelain or Glass Insulators for Overhead Lines with Rated Voltages Above 1kV". 1 Subject content and scope of application
This standard specifies the type and size, technical requirements, test methods, inspection rules, packaging and marking of butterfly insulators for high-voltage lines. This standard is applicable to high-voltage line butterfly insulators (below Referred to as insulator). This standard does not apply to insulators used in media that may damage porcelain and glaze. 2 Reference standards
GB311.1 Insulation coordination of high-voltage power transmission and transformation equipment GB772 Technical conditions for high-voltage insulator porcelain parts
GB775.1~775.3 Insulator test methods GB2900.8 Electrical terminology insulator||tt| |JB/T5896 Commonly used insulator terms
JB/Z94 insulator product packaging
3 terms
The terms in this standard adopt the definitions of GB2900.8 and JB/T5896. 4 Product Category
The shape and main dimensions of the insulator should comply with the requirements in Figures 1 to 2 and Table 1 respectively. The main dimensional deviations of insulator porcelain parts should comply with the provisions of GB772 and drawings.
State Bureau of Technical Supervision approved 1993-07-17 for implementation on 1994-02-01
Model
E-1
E-2
H| |tt||180
150
GB1390—93
Figure 1
Table 1 Main dimensions of insulators
h
95|| tt||80
The openings at both ends of the porcelain parts should have a taper, and the taper should comply with the drawings. Product model description:
E——Butterfly insulator for high-voltage lines;
The numbers after the dash are the shape and size numbers. 5Technical requirements
D
150
130
d
26
26
R
12
12
mm
5.1 Insulators should be manufactured in accordance with this standard and the drawings and technical documents approved in accordance with the prescribed procedures. 5.2 Insulator porcelain parts should comply with the regulations of GB772. The exposed surface of the porcelain piece should be evenly coated with enamel according to the parts specified in the drawing. 5.3 The electrical and mechanical properties of insulators should comply with the requirements in Table 2. Table 2 Electrical and mechanical properties of insulators
not less than
power frequency voltage, kV
type
number
E-1
E -2
Dry flash
45
38
Wet flash
27
23
Breakdown||tt ||78
65
Mechanical failure load, kN is not less than
20
20
5.4 from the date of delivery (that is, when the manufacturer issues the delivery Within two years from the date of notification), if the user discovers that any insulator does not comply with the provisions of this standard under the conditions of complying with this standard and the transportation, storage, installation and operation regulations approved in accordance with the prescribed procedures, the manufacturer must replace it free of charge.
6 Test Methods
Electrical Performance Test
6.1
6.1.1 Test Sample and Test Sample Installation
GB1390—93
Test The product must be dry and clean, and installed according to the installation requirements in Figure 2. The upper and lower plates of the fixture should be parallel. The width of the plate should be 40mm and the length should be at least 1.5 times the diameter of the test specimen. Then it should be fixed on the top of the ground bracket beam. The angle steel used for this beam is 50~60mm wide and not less than 1m long. Use a metal wire with a diameter of approximately 2mm to tie a metal guide rod with a diameter of 12mm and a length of not less than 1m to the side groove of the test sample as a high-voltage electrode. The guide rod should be placed horizontally and at an angle of 90° to the beam. The distance between the ground beam and the ground as well as the test sample and high-voltage electrode and foreign objects should be no less than 1m.
Figure 2
1 test sample; 2--metal guide rod; 3-clamp (width 40mm, length not less than 1.5 times the diameter of the test sample); 4-ground bracket beam||tt| |6.1.2 Test conditions and test procedures
The general conditions and test procedures of the test shall be carried out in accordance with the provisions of GB775.2. 6.2 Other test methods for insulators should comply with the regulations of GB775.1~775.3 and GB772. 7 Inspection rules
.7.1 Inspection rules for insulators, in addition to the provisions of this standard, should comply with the provisions of GB772. 7.2 The testing of insulators is divided into individual testing, sampling testing and type testing. 7.3 Test one by one
Insulators should be tested one by one according to the provisions of Table 3. If an insulator is found not to comply with any of the requirements specified in the table, the insulator is deemed to be unqualified.
Table 3 Insulator test items one by one
Serial number
1
2
3
Test item name
Appearance quality Inspection
Dimensional deviation inspection
Working surface spark voltage test
Note: Item 2 only checks the d size of the insulator. 7.4 Sampling test
The insulator sampling test plan is as follows: Test basis
Article 5.2 of this standard
Chapter 4 of this standard
Article 5.2 of this standard||tt ||Test method
GB775.1
GB775.1
GB775.2
a.
b.
c.| |tt||d
Serial number
1
2
3
4
e.wwW.bzxz.Net
GB1390-93
The insulator sampling test adopts a piece-based secondary sampling plan; the inspection level of the sampling test is in accordance with S-3 specified in GB772 Article 3.6.2.1; the sampling judgment criteria is in accordance with GB772 Article 3.6.2.2; the sampling test items are specified in Table 4.
1 Insulator sampling test items
Table 4
Test item name
Dimensional deviation inspection
Temperature cycle test
Mechanical damage load test
Porosity test
Judgment of sampling test results
Test basis
Chapter 4 of this standard
Article 5.2 of this standard
Article 5.3 of this standard
Article 5.2 of this standard
Number of test specimens
All drawn according to the inspection level
All after inspection in item 1||tt| |The test piece after the test of item 2
The porcelain block after the test of item 3,
Take one piece of each porcelain piece
According to the sample of each item for the sampling test The capacity is tested. After the test, the results of each test item are judged according to the provisions of Article 3.6.3 of GB772.
If all items are qualified, accept the batch. If one or more test items fail, the batch will be rejected. However, if only the dimensions or geometric tolerances fail to pass the inspection, inspections are allowed one by one, and qualified products can leave the factory. 7.5 Type test
When a new product is trial-formulated or the structure of a normal product is modified, or the raw material formula and process method are changed, all type tests must be carried out, or part of the type test must be carried out according to the nature of the change. The type test adopts a piece-rate one-time sampling plan, and the judgment criteria are shown in Table 6. The type test shall be carried out according to the provisions of Table 5 after each test is qualified. Table 5 Insulator type test items
Serial number
1
2
3
4
5
6|| tt||7
Test item name
Dimensional deviation inspection
Power frequency dry flashover voltage test
Power frequency wet flashover voltage test
Temperature Cyclic test
Mechanical failure load test
Power frequency breakdown voltage test
Porosity test
Test basis
Chapter 4 of this standard||tt ||Article 5.3 of this standard
Article 5.3 of this standard
Article 5.2 of this standard
Article 5.3 of this standard
Article 5 of this standard.3 items
Article 5.2 of this standard
Table 6 Piece counting one-time sampling judgment criteria
Test quantity
8 pieces
3 pieces after item 1
The 3 animals after item 2
The 5 animals after item 1
The 5 animals after item 1
The 3 animals after item 3|| tt||Porcelain blocks after item 5, take a block from each piece
Judgment number, only
Sample size, only
5
8||tt ||13
Ae
0
0
1
R
1
1
2
Each item of the type test shall be tested according to the sample size of each item, and the results shall be judged according to the judgment criteria in Table 6. If the number of qualified products in the sample is not GB1390-93
d≤A. , then this item is qualified; if d≥R. , then the item is unqualified. After the test, if all items are qualified, the type test is passed. If one or more test items are unqualified, the type test is failed. 8 Packaging and Marking
8.1 The packaging of insulators is recommended to comply with the provisions of JB/Z94. 8.2 The insulators should be clearly and firmly marked with the manufacturer's trademark and year of manufacture in the parts specified in the drawing. 8.3 The insulator packaging box or label should be marked: | |tt||a.Manufacturer name:
b. Insulator specifications, models (or codes); c. Number and weight of insulators;
d. Words such as "Handle with Care" and "Porcelain" or instruction marks 8.4 Each box (or box) of insulators delivered should be accompanied by a product inspection certificate, which should have the seal of the manufacturer's quality inspection department. Additional notes:
This standard is proposed by the Ministry of Mechanical and Electronics Industry of the People's Republic of China. This standard is under the jurisdiction of Xi'an Electric Porcelain Research Institute. This standard is drafted by Xi'an Electric Porcelain Research Institute. The main drafters of this standard are Liu Shuheng, Cai Meicheng, and Chen Xiaoliang.
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