GB 9326.3-1988 Oil-paper insulated self-contained oil-filled cables and accessory terminals for AC 330 kV and below
Some standard content:
National Standard of the People's Republic of China
Oil-filled paper-insulated cables and accessories for alternating voltages up to and including AC 330kV and below
Terminal
330 kvSealing ends
GB9326.3-88
This standard is equivalent to the international standard IEC141-1 (1976) "Paper insulation, metal sheath, oil-filled cables and accessories for AC voltage 400kV and below "Provisions. || tt | General Provisions on Oil-paper Insulated Self-contained Oil-Filled Cables and Accessories 330kV and Below. 2 Usage characteristics
2.1 The rated voltage and maximum working voltage of the terminal should comply with the provisions of Article 2.1 of GB9326.2 "Oil-paper insulated self-contained oil-filled cables and accessories oil-paper insulated self-contained oil-filled cables AC 330kV and below" . 2.2 Ordinary terminals are suitable for areas where the altitude does not exceed 1000m and where the air is not significantly polluted (leakage ratio is less than 1.7cm/kV). 2.3 The long-term allowable operating oil pressure of the terminal of ordinary porcelain sleeves should not exceed 0.6MPa. 3 Materials
3.1 Conductor copper: should comply with the regulations of GB468 "Copper Wire Ingots for Electricians". 3.2 Cable paper: should comply with the requirements of Table 3 of GB9326.2. 3.3 Insulating oil: should comply with the requirements of Table 4 of GB9326.2. 3.4 Epoxy resin: should be used to meet the requirements of Class 1 or Class 1 materials in Table 1. 3.5 Silica powder: It should be used to meet the technical requirements of Class 1 or Class 1 materials in Table 2. National Machinery Industry Commission approved on 1988-05-23 for implementation on 1989-01-01
Appearance
Project name
Epoxy value, equivalent/100g
Viscosity, cP( 25℃)
Softening point, C
Organic chlorine content, <equivalent/100g
Inorganic chlorine content, <equivalent/100g
Volatile content, %, <
Color,
Name item
Silica content, %, ≥
Particle diameter, μm, <
Loss on ignition, %, <
PH value
Water soluble matter content, %, <
Conductivity of water extract, u-'m-1
3.6 curing agent||tt ||GB9326.3—88
Table 1
1
Light yellow transparent liquid
0.38~0.42
4100~9700
0. 02
0.001
1
5
Table 2
1
99
40||tt| |0.2
6~8
0.2
50
Phthalic anhydride: should comply with the technical requirements in Table 3. Methyltetrahydrophthalic anhydride: should comply with the technical requirements in Table 4. Table 3
Project name
Purity (content), %, >
Melting point, ℃
Ignition residue, %, ≤
Chloride ( CI) content, %, ≤
Sulfate content (SO,), %, ≤
Heavy metal (calculated as Pb), %, ≤
Free acid content, %, <
refers to
standard
refers to
light yellow transparent solid
0.28~0.31
44~48
0. 02
0.001
1
5
1
99
20
0.2
6~ 8
0.2
50
standard
99.0
128~131
0.05
0.01
0.005
0.005
1.0
Properties
Neutralization equivalent
Anhydride aldehyde content, %
Viscosity (25℃), cP| |tt||Heating loss, %, <
Specific gravity, d20
Flash point, ℃,>
Free acid content, %, <
Project name| |tt||GB9326.3—88
Table 4
3.7 Aluminum foil: should comply with the technical requirements in Table 5. Table 5
Name
Item
Aluminum content, %, >
Impurity content (total), %, <
Copper, <||tt ||Silicon, <
Iron, <
Iron + silicon, <
Tensile strength, kgf/mm, >
Elongation, %, 0.009, 0.01 thick, ≥0.0120.014 thick,
4
Model and specification
4.1 model
The terminal model is specified in Table 6.
Table 6
Product name
Ordinary terminal type 1
Ordinary terminal type 2
4.2 specifications
Type
Number
CYZK11
CYZK21
terminal specifications are consistent with the cable specifications specified in Table 2 of GB9326.2. 5 Technical Requirements
5.1 The installation dimensions of terminal outlet rods, oil pipe joints and bases shall comply with the provisions of Table 7. Refers to
standard
light yellow
84~89
40
30~50
1
1.20~1.22
130℃
1
number
value
99.5
0.5
0.015
·0.22
0.30
0.45
3.0
0.5
2.0
Structural features
Open type, ordinary type porcelain sleeve , increased winding insulation spread type, ordinary porcelain sleeve, capacitive insulated conductor cross section
mm2
630
>630
outlet rod
outline Rod diameter
mm
44±0.2
(34)
44=8.2
Note: The dimensions in brackets are not recommended. 5.2 Outlet rod
GB9326.3-88
Table 7
Base plate
Rated voltage
kv
110
220
330
5.2.1 The outlet rod should be made of electrolytic copper that complies with the regulations of GB468. 5.2.2 The surface of the outlet rod should be smooth and clean, and no damage or burrs are allowed. 5.2.3 The sealing of outlet rods and supporting hardware shall comply with the provisions of Section 6.3.6. 5.3 Internal insulation
Installation screw hole spacing
mm
430×430
600×600
(498×498)
600 ×600
Oil pipe joint thread
M22×1.5
5.3.1 The insulation within the terminal can be increased winding insulation or capacitive insulation. The cable paper and insulating oil used should comply with the requirements of Table 3 and Table 4 of GB9326.2.
5.3.2 The epoxy stress cone of the increased winding insulation terminal is made of epoxy resin casting. The epoxy resin material used should comply with the requirements in Table 1. Silica powder should comply with the requirements in Table 2. The curing agent phthalic anhydride or methyltetrahydrophthalic anhydride should comply with the requirements of Table 3 and Table 4 respectively. The finished epoxy stress cone must be free of damage, bubbles and cracks. 5.3.3 The capacitor plates used in capacitive terminals should be of thicknesses of 0.009, 0.01, 0.012 and 0.014 and other four specifications of annealed industrial aluminum foil. Aluminum foil should comply with the requirements of Table 5. The surface of the aluminum foil should be clean without lubricant stains or corrosion marks, and the electrode surface should be smooth without burrs or chips.
5.4 Porcelain sleeves
The porcelain sleeves should meet the relevant provisions of the porcelain sleeves in GB772 "Technical Conditions for High Voltage Insulator Porcelain Parts" and GB775 "Insulator Test Methods". The hydraulic pressure resistance of the porcelain sleeve shall comply with the provisions of Section 6.2.2. 5.5 Hardware
5.5.1 Hardware for terminals (except screws) should be made of non-magnetic or low magnetic loss materials. Except for the aluminum screen cover and stainless steel parts, the outer surfaces of other metal parts should be treated with anti-corrosion treatment.
5.5.2 The hydraulic resistance of the top cover, tail pipe, oil pipe joints and valves shall comply with the provisions of Section 6.2.1. 5.6 Seal ring
The rubber used for the terminal seal ring should be oil-resistant rubber and compatible with cable oil. 5.7 Terminal support insulator
5.7.1 Terminal support insulator shall comply with the provisions of GB772 and the relevant provisions of GB769 "Indoor support insulators for power stations with 35 kV and below".
5.7.2 The bending failure load and tensile failure load of the terminal support insulator should not be less than 1600kg. 5.7.3 The electrical performance of terminal support insulators shall comply with the provisions of Section 6.2.4. 5.8 Terminal
Terminal performance shall comply with the provisions of various tests in Chapter 6. 6 Test items and methods
6.1 Test items and methods are as specified in Table 8. Serial number
1
1.1
1.2
1.3
2
3
4
5| |tt||6
7
8
9
10
11
12
13||tt ||Terminal component test
Terminal test after assembly
6.2 component test
Test items
Structural inspection
Outlet rod
Epoxy stress cone
Porcelain sleeve
Porcelain sleeve hydraulic test
GB9326.3—88
Table 8
Standard provisions
5.2 .2
5.3.2
5.4
6.2.2
Hydraulic pressure test of top cover and tail pipe
Paper drum oil sample test||tt ||Support insulator withstand voltage test
Conductor connection mechanical and electrical performance test
Terminal oil sample test
AC long-term withstand voltage test
Power frequency 1-minute withstand voltage test
Lightning impulse voltage test
Operation impulse voltage test
Terminal hydraulic pressure test
Terminal horizontal tension test
6.2.1 Top cover, tail pipe and other metals Hydraulic test of castings 5.5.2
6.2.3
6.2.4
6.2.5
6.3.1
6.3.2|| tt||6.3.3
6.3.4
6.3.5
6.3.6
6.3.7
Test type
T,R
T,R
T,R
T,R
T,R
T,s
T| |tt||T
T
T
T
T
T
T
T||tt ||Visual inspection
Visual inspection
Test method
GB 772,GB 775
Section 6.2.2 of this standard
Section 6.2.1 of this standard
GB507
GB3048.8
Article 6.2.5 of this standard
GB507
GB3048.8
GB3048.8|| tt||GB311
GB311wwW.bzxz.Net
Section 6.3.6 of this standard
Section 6.3.7 of this standard
Seal both ends of the test product and apply The hydraulic pressure reaches twice the maximum design pressure and is maintained for no less than 2 hours; the pressure is allowed to be adjusted at any time during the test. There should be no leakage and visible deformation. 6.2.2 Hydraulic test of porcelain sleeve
The porcelain sleeve should be subjected to a hydraulic test at ambient temperature before leaving the factory: apply twice the maximum design pressure for 15 minutes, and the porcelain sleeve should have no leakage or rupture. If the porcelain sleeve manufacturer has a test certificate for this test item, this test does not need to be performed. 6.2.3 Paper drum oil sample test
The cable oil sampling test results in the paper drum should meet the following requirements: oil temperature 20±10℃, power frequency breakdown voltage should be greater than 50kV/2.5mm; oil When the temperature is 100±1℃ and the electric field gradient is 1kV/mm, the tg? value should be less than the value specified in Table 9. Table 9
Rated voltage, kV
110,220
330
6.2.4 Support insulator withstand voltage test
tg
0.005|| tt | During the test, the supporting insulator should not undergo breakdown or flashover. 6.2.5 Mechanical and electrical testing of conductor connections is under consideration.
6.3 Post-assembly terminal test
Each terminal sample must first undergo the test in Section 6.3.1. After passing the test, subsequent tests will be carried out. The tests specified in Sections 6.3.2, 6.3.3 and 6.3.4 and 6.3.5 of GB9326.3-88
can be conducted on four terminal specimens respectively, or on only one specimen. If more than one test is performed on a terminal specimen, the test procedure shall be determined by the manufacturer. If the second or subsequent test fails to meet the requirements, the failed test shall be repeated on a new terminal specimen. The cable used to install the terminal specimen should be the same as or higher than the rated voltage of the terminal specimen. 6.3.1 Terminal oil sample test
24 hours after the terminal is assembled, an oil sample should be taken from the top of the terminal for test, and the test results should comply with the provisions of Section 6.2.3. 6.3.2 AC long-term withstand voltage test
Conduct the AC long-term withstand voltage test together with the cable according to the provisions of GB9326.2 Section 7.4.2. The terminal sample should be free of breakdown and flashover. 6.3.3 Power frequency 1-minute withstand voltage test
The terminal shall withstand the power frequency test voltage specified in Table 10 for 1 minute at ambient temperature, and the terminal shall not undergo breakdown or flashover. Table 10
Rated voltage
110
220
330
6.3.4 Lightning impulse voltage test
Power frequency test voltage|| tt | | 200 | | tt | | 460 | | tt | | 570 | There should be no breakdown or flashover. 6.3.5 Operation impulse voltage test
330kV terminal shall be subjected to wet operation impulse voltage test together with the terminal and cable according to the provisions of GB9326.2 Section 7.4.4. The terminal specimen should be free from breakdown and flashover.
6.3.6 Terminal hydraulic pressure test
After assembly, the lower end of the terminal is sealed and filled with hydraulic pressure of twice the maximum design pressure for 15 minutes at ambient temperature. The terminal should have no leakage. 6.3.7 Terminal horizontal tension test
is under consideration.
7 Acceptance Rules
7.1 Products should be inspected by the technical inspection department of the manufacturer before they can leave the factory. Each package shipped from the factory should be accompanied by a product quality inspection certificate.
According to user requirements, the manufacturer should provide product test records. 7.2 Products should be inspected and accepted according to the test items specified in Table 8. 7.2.1 Sampling tests are carried out in batches. Each impregnation cylinder paper roll is a batch. At least one paper roll barrel should be taken from each batch for oil sample testing. If it fails, the test should be carried out one by one, and the oil of the unqualified barrel should be changed or the paper roll should be reprocessed until it is qualified. 7.2.2 If the provisions of Sections 6.3.2, 6.3.3, 6.3.4 and 6.3.5 are not met, new specimens may be made in double the quantity, and the unqualified items shall be retested and final assessment shall be made.
7.2.3 When it does not comply with Section 6.3.6, the leaking parts may be replaced until they meet the requirements. 7.2.4 If the requirements of Section 6.3.1 are not met, the oil in the terminal can be replaced with qualified cable oil, and re-sampling and inspection will be carried out after 24 hours until the requirements are met.
7.2.5. When it does not comply with paragraph 6.2.2, the porcelain sleeve is an unqualified product. 7.2.6 If it does not comply with 6.2.1, the top cover and tail pipe can be repaired and retested until they meet the requirements. 8 Product logo and packaging
8.1 logo
GB9326.3-88
8.1.1 A metal sign should be inlaid on the side of the terminal base plate to indicate: manufacturer name; ||tt| |a.
Model and specification;
b.
Rated voltage;
c.
d.
Year and month of manufacture.
8.1.2 Two paper labels should be attached to the inner insulating paper drum or directly printed with paint to indicate: model and specifications;
a.
b. Paper roll serial number;
c. Number of paper rolls.
8.1.3 The terminal model and number of plates should be indicated on the cover of the capacitor plate package, and the plate serial number should be indicated on each aluminum foil plate. 8.1.4 The side of the packaging box should be marked with words and symbols such as “Handle with care”, “Protect from rain” and “Do not turn upside down”. 8.2 Packaging
8.2.1 The porcelain sleeve and metal parts can be packed in the same packaging box, or the porcelain sleeve can be packaged separately. The box should be accompanied by a list of parts and components. 8.2.2 The inner insulation paper drum should be Sealed against leaks. 8.2.3 The epoxy stress cone should be filled with soft paper or plastic, and should be prevented from being damaged by collision with other components in the box. 8.2.4 The packaging of capacitor plates should ensure that the plates are not wrinkled or damaged, and each layer of plates should be separated by soft paper. 8.2.5 One valve should be attached to each terminal, and a set of insulated connecting pipes should be attached to every two terminals. 9Transportation and Storage
9.1 Do not turn the packaging box upside down or collide during transportation. 9.2 Should be stored in a clean and dry place.
Additional notes:
This standard is under the jurisdiction of Shanghai Cable Research Institute. This standard was drafted by Shanghai Cable Research Institute, Shanghai Cable Factory, Shenyang Cable Factory, etc. The main drafter of this standard is Wang Peilong.
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