JB/T 56211-1999 Coupling capacitors and capacitive voltage dividers product quality classification
Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T56211
1999-12-30
Wa Xian Ji Dong
2000-06-01
JB/T562111999
This standard is a revision of JB/T56211-94 "Quality Grading of Coupling Capacitors and Capacitive Voltage Dividers". During the revision, in addition to the editorial modification of the original standard, the main technical contents have been changed as follows: 1 In Table 1, a) Capacitance deviation is changed to: same as qualified products. b) Partial discharge performance is changed to: first-class products are not more than 8pC; superior products are not more than 5pC. c) The appearance in Table 2 and the contents related to packaging in Chapter 5 are placed in Table 1. 2 Add the item "Inspection" in Table 2.
3 The requirements for component drawings and core pre-baking are deleted in Table 3. 4 Added the requirement that the enterprise management must pass ISO9000 quality system certification in the category of superior products, 5 Added the requirements for the division of specification segments. 6 Provisions are made for the sampling of products of the same variety and specification segment. This standard replaces JB/T 56211-94 from the date of implementation. This standard is proposed and coordinated by the National Power Capacitor Standardization Technical Committee. The drafting unit of this standard is Xi'an Power Capacitor Research Institute. The main drafter of this standard is Zhu.
This standard was first issued in January 1989.
This standard is entrusted to Xi'an Power Capacitor Research Institute for interpretation. I
1 Scope
This standard specifies the requirements for the quality classification of coupling capacitors and capacitor voltage dividers, and the inspection and evaluation methods. JB/T562111999
JB/T5621194
This standard applies to the following capacitors in power systems with a frequency range of 15Hz to 60Hz and an altitude of no more than 1000m: e) Coupling capacitors used in power line carrier (PI.C) systems with a frequency range of 30~500kIIz on high voltage overhead lines: b) Capacitor dividers used in capacitive voltage sensors: e) Coupling capacitors used for overvoltage protection and other similar purposes. Hereinafter referred to as "products". This standard is a unified definition of the level of product quality (including design quality and manufacturing quality), and is the basis for assessing product quality, product classification and grading, and enterprise upgrading (quality indicators). 2 Reference standards
The provisions contained in the following standards constitute the text of this standard before being cited in this standard. At the time of publication of the standard, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest version of the following standards. GB/T2900.16—1996 Electrical terminology Capacitor (neqIEC60050 (436): 1990) JB/T8169—1999
3 Definitions
Coupling capacitors and capacitive voltage dividers (cnv1EC60358: 1990) In addition to the definitions specified in GB3/T 2900.16, this standard also uses the following definitions. 3.1 Main quality indicators
Electrical performance that reflects the main characteristics of the product and parameters directly related to durability, reliability and life, etc. 3.2 Key processes
Main processes that ensure product performance and are directly related to the main quality indicators of the product during the product production process. 3.3 Defects
A defect is constituted when the quality characteristics of a unit product or component do not meet the requirements of the Taiwan regulations. According to the degree of influence on the quality characteristics of unit products or parts, defects are divided into:
a) Class A defects: defects that make the key quality characteristics of the product not meet the requirements are called Class A defects. b) Class B defects: defects that make the important quality characteristics of the product not meet the requirements are called Class B defects, c) Class C defects: defects that make the general quality characteristics of the product not meet the requirements are called Class C defects. 4 Scope and content of assessment indicators
4.1 Assessment of main quality indicators
The classification of main quality indicators is shown in Table 1.
4.2 Assessment of key process items
The assessment items and requirements of key processes are shown in Table 2. Wa Extremely Slow 1999-12-30 Tumor
2000-06-01 Cable
4.3 Assessment of main items of main components
JB/T562111999
The main components are guide wire sheets, cores, components, etc. The main items of main components and the severity classification of defects are shown in Table 3. Table 1 Classification of main quality indicators
Main quality indicators
Capacitance deviation (at 20℃)
Loss hall cut-off value (at 20℃)
Dielectric strength
Sealing
Peripheral discharge performance
Stray capacitance value
Stray conductivity
Capacitance temperature coefficient
Excess oil pressure inside the product
Safety
Annual cycle rate
Qualified product
Not less than 0.0012
Same as qualified product
Micro qualified product
Superior product
Not more than 19.0010
The product is heated to an internal temperature of 60±5℃ and maintained for 2h, with no leakage, in accordance with JB/T 8169
's requirements
Partial discharge intensity is not more than 8pC
Partial effective discharge intensity is not more than 5pC
Not more than 150pF
Not more than 15μ
Not more than 3×1|
Not more than .1×10K
According to the local ambient temperature at that time, and referring to the product's internal pressure and temperature relationship curve, the pressure difference at the corresponding temperature shall not exceed 0. (2 MPa, but no negative pressure should appear. Safety explosion-proof protection measures should be taken. The product appearance should not exceed 0.5%. The external metal part of the product should have a reliable anti-corrosion layer. Minor defects that do not affect the performance and use of the product are allowed. The surface of the galvanized passivated product such as the bottom cover is bright, and small defects such as rust and spots are allowed. The sealing gasket at the bottom cover and the rubber gasket at the half ring are not allowed to have obvious deviation. The exposed surface of the cast iron base should be flat, and the surface paint should not be wrinkled or flowed. The packaging should meet the requirements of the packaging drawing to ensure that the product is transported and stored normally. Intact, non-destructive tests should be carried out in accordance with the provisions of JB/T8169, among which the extreme withstand voltage is 75% of the test voltage, and the 2-year ring loss rate is calculated by the percentage of the total number of damaged units in the year to the total number of units put into operation in the year. 2
Lead piece
Rolling process
Injection treatment process
Core assembly, vacuum
Drying and dipping process
2. Inspection
3. Technical documents
4. User service
JB/T562111999
Table 2, key process, inspection, technical documents, user service assessment requirements
1. Have professional process documents
2. Clean room cleanliness:
Diameter greater than 0. 5 μm dust content per liter; Grade A product: no more than 400 particles (dynamic):
Superior product: no more than 200 particles (dynamic)
3. Temperature and humidity meet the process requirements
4. Original records are accurate and complete
1. Professional process documents are available
2. The performance of the treated diffusion agent meets the process requirements3. Original records are accurate and complete
1. Professional process documents are available
2. The assembly and vacuum immersion processes meet the process requirements3. Original records are difficult to be accurate and complete
The technical documents for the factory test phase (including: equipment, instruments, and quality of test personnel) required by the corresponding product standards should be complete. Correct and unified, the assessment contents include; 1. Product model certificate
2. Product technical conditions
3. Product drawings
4. Product identification certificate
5. Process documents
6. Key process control documents
7. Product instruction manual
B. Product certificate
9. Technology and quality management system
ε) Drawing storage and change system
b) Raw materials, outsourced parts, and purchased parts inspection systeme) Semi-finished products and finished products inspection system
d) Work card and measuring tool inspection system
e) Finished product packaging and transportation system
1. Establish a user visit and monthly household petition system2.Establish user opinion files and analyze and handle them in time Table 3 Main items and defect severity classification of main components Main items and defects
No annealing when using cold-rolled purple
Surface bond tin large surface copper exposed, plating is not smooth, oxidation black with burrs, R end has an angle
Length tolerance is greater than 3mm
The relative position deviation of the two aluminum boxes is greater than 0.5m at the lead piece end. The deviation of the two dielectric edges is greater than 1mm at the lead piece end. Detection method and
Measurement accuracy||t t||Ear measurement and manual inspection
Visual inspection and manual inspection
Measure with steel ruler
Measure with steel ruler
Measure with steel ruler
Defect severity classification
Expansion scale
JB/T562111999
Table 3 (standard)
Main items and defects
Failure to carry out pressure resistance test and random inspection according to process requirements. Unqualified lead pieces are not firmly connected, are desoldered, have burnt corners, and the lead wires are uneven and have folds. Burrs and other leakage
The welding edge is not smooth and has sharp edges
The welding with the connecting wire is not firm and has protruding corners
The thickness of the coating is less than 20 μm. The screw hole has tapping and slippage
The diameter of the unpenetrated part of the screw hole is less than 2 mm. The center deviation of the screw hole of the overall assembly is greater than 0.5 mm. The diameter of the screw hole of the overall assembly has a deviation of more than 15%. The coating thickness is less than 20 μm
The hole has tapping and slippage
The diameter of the unpenetrated part of the screw hole is less than 2 mm. The center distance deviation of the hole of the overall assembly is greater than 0.5 mm. The angle deviation of the screw hole diameter of the overall assembly is less than 15%. The grinding parts at both ends do not meet the technical requirements of the drawing. The size of the convex parts at both ends is worn into the main body
Bending and roundness. The main body is obviously deformed
The center distance deviation of the installation hole is greater than 2 mm
Assembly screw hole tapping
Screw hole center distance deviation is greater than c. 5 mI
The relative position angle deviation of the blast hole is greater than 0.5°. The surface is uneven, sand sticks, there are pores, sand holes, etc. Detection methods and
Measurement accuracy
According to the process requirements of the enterprise
Visual inspection and manual inspection
Visual inspection and manual picking
Shrinkage leak test method
Hand inspection and visual inspection
Use coating thickness gauge
Measure with depth caliper
Measure with caliper
Measure with caliper
Measure with caliper
Measure with caliper
Measure with caliper
Measure with caliper
Measure with caliper
Measure with caliper
Measure with caliper
Measure with caliper
Measure with wire gauge
Measure with caliper
Can be converted into chord length Caliper measurement
Note, in the defect severity classification column, an item with two levels "what\ is distinguished according to the severity of the defect. 5 Division and assessment of product quality levels
Product quality levels are divided into qualified products, first-class products and superior products. 5.1 Qualified products
5.1.1 Product quality indicators should fully meet the requirements of qualified products in Table 1. Defect severity classification
5.1.2 The manufacturing quality of parts and components should meet the requirements of drawings, processes and standards, and the main items of main parts and components should be determined according to Table 3. The defect rate of the main items of its main parts and components shall not exceed 3.16%. Among them, there shall be no more than 2 A-level defects; and no more than 20 B-level defects. 5.1.3 Key product processes, inspections, technical documents, user services, etc. shall comply with the provisions of Table 2. 5.1. 4 The validity period of the product type test shall not exceed 5 years. 5.1.5 Users evaluate that the product can meet the use requirements. 5.2-grade products
JB/T562111999
In addition to meeting the conditions of qualified products, it shall also meet the following requirements. 5.2. 1 Meet the requirements of first-grade products in Table 1. 5.2.2 The defect rate of the main parts ± key items shall not exceed 1.79%, and Class A defects are not allowed: Class B defects shall not exceed 15. 5.2.3 The first-grade product rate of this type of product shall not be less than 75% (assessed quarterly). 5.2.4 Users evaluate that the product is in good use and has competitiveness in the domestic market. 5.3 Superior products
In addition to meeting the conditions of first-grade products, it shall also meet the following requirements. 5.3.1 Meet the requirements of superior products in Table 1. 5.3.2 Enterprise management must pass ISO9000 quality system certification. 5.3.3 The defect rate of the main items of the main parts and components shall not exceed 0.78%, and no Class A defects are allowed. The number of Class B defects shall not exceed 6. 5.3.4 The rate of superior products of this type shall not be less than 75% (assessed quarterly). 5.3.5 It is a well-known brand product among similar products and is competitive in the international market. 6 Sampling and evaluation
6.1 Division of specification segments
The same variety of products is divided into two specification segments according to the voltage level: 220kV and below 220kV and above. 2 Sampling and evaluation of main parts and components
The quality characteristics of the main parts and components are divided into three levels according to the severity of their defects: Class A defects, Class B defects, and Class C defects. 6.2.1 Sampling of main parts and components
Each part and component in the manufacturing department's warehouse is tested for 10 defects. 6.2.2 Evaluation of main parts and components
6.2.2.1 The quality level of main parts and components shall be evaluated by "main part defect rate" and "number of defects". 6.2.2.2 The main part defect rate of main parts and components shall be calculated as follows: 100D+50D+10D×100
Wherein: D is the total number of A-level defects,
is the total number of B-level defects;
is the total number of C-level defects;
is the total number of parts and components to be sampled;
is the coefficient 100, 50, 10—respectively the weighted values of A, B, and C-level defects. 6.3 Sampling and evaluation of products
6.3.1 Product sampling
6.3.1.1 Randomly select two units from the enterprise's finished product warehouse or from the user units that have delivered goods to the enterprise in the past six months. 6.3.1.2 In principle, for products of the same variety and the same specification segment, products with high voltage levels and large single-unit voltage penetration values shall be selected for assessment, and the specific specification segment for excellence shall be determined based on this.
6.3.2 Product evaluation
6.3.2.1 The product quality star shall meet all the requirements of the corresponding level in the above regulations before it can be graded. 6.3.2.2 When the enterprise evaluates the quality level of the product, it shall submit an application report, and the higher-level competent department shall approve the grade. 55° Surface unevenness, sand sticking, pores, sand holes, etc. Detection methods and
Measurement accuracy
According to the enterprise's process requirements
Visual inspection and hand inspection
Visual inspection and hand picking
Shrinkage leak test method
Hand inspection and visual inspection
Use coating thickness gauge
Measure with depth caliper
Measure with caliper
Measure with caliper
Measure with caliper
Measure with caliper
Measure with caliper
Measure with caliper
Measure with wire gauge
Measure with caliper
Can be converted into chord length and measured with caliper
Note, In the defect severity classification column, an item with two levels is classified according to the severity of the defect. 5 Division and assessment of product quality levels
Product quality levels are divided into qualified products, first-class products and superior products. 5.1 Qualified products
5.1.1 Product quality indicators should fully meet the requirements of qualified products in Table 1. Defect severity classification
5.1.2 The manufacturing quality of parts and components should meet the requirements of drawings, processes and standards, and the main items of main parts and components should be determined according to Table 3. The defect rate of the main items of its main parts and components shall not exceed 3.16%. Among them, there shall be no more than 2 A-level defects; and no more than 20 B-level defects. 5.1.3 Key product processes, inspections, technical documents, user services, etc. shall comply with the provisions of Table 2. 5.1. 4 The validity period of the product type test shall not exceed 5 years. 5.1.5 Users evaluate that the product can meet the use requirements. 5.2-First-class products
JB/T562111999
In addition to meeting the conditions of qualified products, it shall also meet the following requirements. 5.2. 1 Meet the requirements of first-class products in Table 1. 5.2.2 The defect rate of ± key items of major components shall not exceed 1.79%, and Class A defects are not allowed: Class B defects shall not exceed 15. 5.2.3 The first-class product rate of this type of product shall not be lower than 75% (assessed quarterly). 5.2.4 Users evaluate that the product is in good use and the product is competitive in the domestic market. 5.3 Superior products
In addition to meeting the conditions of first-class products, it shall also meet the following requirements. 5.3.1 Meet the requirements of superior products in Table 1. 5.3.2 Enterprise management must pass ISO9000 quality system certification. 5.3.3 Major defects of major components The rate shall not exceed 0.78%, and no Class A defects are allowed. The number of Class B defects shall not exceed 6. 5.3.4 The rate of superior products of this type shall not be less than 75% (assessed quarterly). 5.3.5 It is a well-known brand product among similar products and is competitive in the international market. 6 Sampling and evaluation
6.1 Division of specification segments
The same variety of products is divided into two specification segments according to the voltage level: 220kV and below 220kV and above. 2 Sampling and evaluation of main components
The quality characteristics of main components are divided into three levels according to the severity of their defects: Class A defects, Class B defects, and Class C defects. 6.2.1 Sampling of main components
Each component in the manufacturing department’s warehouse is tested for 10 defects. 6.2.2 Evaluation of main parts and components
6.2.2.1 The quality level of main parts and components shall be evaluated by "main part defect rate" and "number of defects". 6.2.2.2 The main part defect rate of main parts and components shall be calculated as follows: 100D+50D+10D×100
Wherein: D is the total number of A-level defects,
is the total number of B-level defects;
is the total number of C-level defects;
is the total number of parts and components to be sampled;
is the coefficient 100, 50, 10—respectively the weighted values of A, B, and C-level defects. 6.3 Sampling and evaluation of products
6.3.1 Product sampling
6.3.1.1 Randomly select two units from the enterprise's finished product warehouse or from the user units that have delivered goods to the enterprise in the past six months. 6.3.1.2 In principle, for products of the same variety and the same specification segment, products with high voltage levels and large single-unit voltage penetration values shall be selected for assessment, and the specific specification segment for excellence shall be determined based on this.
6.3.2 Product evaluationbzxz.net
6.3.2.1 The product quality star shall meet all the requirements of the corresponding level in the above regulations before it can be graded. 6.3.2.2 When the enterprise evaluates the quality level of the product, it shall submit an application report, and the higher-level competent department shall approve the grade. 55° Surface unevenness, sand sticking, pores, sand holes, etc. Detection methods and
Measurement accuracy
According to the enterprise's process requirements
Visual inspection and hand inspection
Visual inspection and hand picking
Shrinkage leak test method
Hand inspection and visual inspection
Use coating thickness gauge
Measure with depth caliper
Measure with caliper
Measure with caliper
Measure with caliper
Measure with caliper
Measure with caliper
Measure with caliper
Measure with wire gauge
Measure with caliper
Can be converted into chord length and measured with caliper
Note, In the defect severity classification column, an item with two levels is classified according to the severity of the defect. 5 Division and assessment of product quality levels
Product quality levels are divided into qualified products, first-class products and superior products. 5.1 Qualified products
5.1.1 Product quality indicators should fully meet the requirements of qualified products in Table 1. Defect severity classification
5.1.2 The manufacturing quality of parts and components should meet the requirements of drawings, processes and standards, and the main items of main parts and components should be determined according to Table 3. The defect rate of the main items of its main parts and components shall not exceed 3.16%. Among them, there shall be no more than 2 A-level defects; and no more than 20 B-level defects. 5.1.3 Key product processes, inspections, technical documents, user services, etc. shall comply with the provisions of Table 2. 5.1. 4 The validity period of the product type test shall not exceed 5 years. 5.1.5 Users evaluate that the product can meet the use requirements. 5.2-First-class products
JB/T562111999
In addition to meeting the conditions of qualified products, it shall also meet the following requirements. 5.2. 1 Meet the requirements of first-class products in Table 1. 5.2.2 The defect rate of ± key items of major components shall not exceed 1.79%, and Class A defects are not allowed: Class B defects shall not exceed 15. 5.2.3 The first-class product rate of this type of product shall not be lower than 75% (assessed quarterly). 5.2.4 Users evaluate that the product is in good use and the product is competitive in the domestic market. 5.3 Superior products
In addition to meeting the conditions of first-class products, it shall also meet the following requirements. 5.3.1 Meet the requirements of superior products in Table 1. 5.3.2 Enterprise management must pass ISO9000 quality system certification. 5.3.3 Major defects of major components The rate shall not exceed 0.78%, and no Class A defects are allowed. The number of Class B defects shall not exceed 6. 5.3.4 The rate of superior products of this type shall not be less than 75% (assessed quarterly). 5.3.5 It is a well-known brand product among similar products and is competitive in the international market. 6 Sampling and evaluation
6.1 Division of specification segments
The same variety of products is divided into two specification segments according to the voltage level: 220kV and below 220kV and above. 2 Sampling and evaluation of main components
The quality characteristics of main components are divided into three levels according to the severity of their defects: Class A defects, Class B defects, and Class C defects. 6.2.1 Sampling of main components
Each component in the manufacturing department’s warehouse is tested for 10 defects. 6.2.2 Evaluation of main parts and components
6.2.2.1 The quality level of main parts and components shall be evaluated by "main part defect rate" and "number of defects". 6.2.2.2 The main part defect rate of main parts and components shall be calculated as follows: 100D+50D+10D×100
Wherein: D is the total number of A-level defects,
is the total number of B-level defects;
is the total number of C-level defects;
is the total number of parts and components to be sampled;
is the coefficient 100, 50, 10, which are the weighted values of A, B and C-level defects respectively. 6.3 Sampling and evaluation of products
6.3.1 Product sampling
6.3.1.1 Randomly select two units from the enterprise's finished product warehouse or from the user units that have delivered goods to the enterprise in the past six months. 6.3.1.2 In principle, for products of the same variety and the same specification segment, products with high voltage levels and large single-unit voltage penetration values shall be selected for assessment, and the specific specification segment for excellence shall be determined based on this.
6.3.2 Product evaluation
6.3.2.1 The product quality star shall meet all the requirements of the corresponding level in the above regulations before it can be graded. 6.3.2.2 When the enterprise evaluates the quality level of the product, it shall submit an application report, and the higher-level competent department shall approve the grade. 5
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.