This standard applies to straight-through joints and plug joints of AC 110~330kV oil-paper insulated self-contained oil-filled cables. In addition to complying with the requirements of this standard, the joints should also comply with the requirements of 9326.1 "General Provisions for Oil-Paper Insulated Self-Contained Oil-Filled Cables and Accessories for AC 330KV and Below". GB 9326.4-1988 Oil-paper insulated self-contained oil-filled cables and accessories connectors for AC 300 kV and below GB9326.4-1988 Standard download and decompression password: www.bzxz.net

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
Connectors
330 kVJoints
GB9326.4-88
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.
1 Scope of application
1.1 This standard is applicable to the straight-through joints and plug joints of AC 110~330kV oil-paper insulated self-contained oil-filled cables. 1.2 In addition to complying with the requirements of this standard, the joints should also comply with the requirements of GB9326.1 "General Provisions for Oil-Paper Insulated Self-Contained Oil-Filled Cables and Accessories for AC 300kV and Below". 2 Usage characteristics
2.1 The rated voltage and maximum working voltage of the connector should comply with Article 2.1 of GB9326.2 "Oil-paper insulated self-contained oil-filled cables and their accessories oil-paper insulated self-contained oil-filled cables for AC 300kV and below" Provisions. 2.2 The oil circuit of the cable connected to the straight-through joint should be kept clear, and the long-term allowable working oil pressure should comply with the provisions of Article 2.2 of GB9326.2. 2.3: The cable oil circuit connected to the plug connector should be completely blocked. The long-term allowable working oil pressure at both ends of the plug joint should be designed and determined based on the cable working oil pressure, line drop and other specific conditions. 2.4 It can be installed indoors, in cable trenches, shafts, directly buried in the soil or installed underwater. 3 Models and specifications
3.1 Model
The model of the connector should comply with the requirements in Table 1.
Table 1
Product name
Straight connector
Plug connector
3.2 specifications
Type
No.|| The specifications of the tt||CYJT
CYJS
connector are consistent with the cable specifications specified in Table 2 of GB9326.2. Structural features approved by the National Machinery Industry Commission on 1988-05-23
The oil path is smooth
The oil path is blocked, and both ends can withstand a certain oil pressure difference. Implemented on 1989-01-01
4 Materials
Should comply with the provisions of Chapter 3 of GB9326.3.
5 Technical requirements
5.1 Conductor crimping
GB9326.4-88
5.1.1 The conductor crimping pipe should be in compliance with the regulations of GB468 "Copper Wire Bars for Electrical Use" Made of electrolytic copper, its surface should be smooth and clean, with no damage or burrs allowed
5.1.2 The mechanical and electrical properties of the conductor connection should comply with the provisions of Section 6.2.3. 5.2 Cable paper and insulating oil for internal insulation | 5.3 Epoxy plug pipe
5.3.1 The epoxy plug pipe of the plug joint is made of epoxy resin castings and shall comply with the provisions of GB9326.3 Section 5.3.2. 5.3.2 The oil line plug seals on both sides of the plug joint should be able to withstand 1.5 times the maximum design pressure difference, and there should be no leakage in the 48-hour hydraulic test. 5.4 Shell and hardware
5.4.1 The metal materials (except screws) used in the joints should be non-magnetic or low magnetic loss materials. Except for stainless steel parts, the surfaces of other metal parts should be treated with anti-corrosion treatment.
5.4.2 The metal shell should withstand 2 times the maximum design pressure and a 30-minute hydraulic test. All welds, sealing interfaces, and shells should have no leakage or visible deformation.
5.4.3 The oil pipe joint thread of the joint shall be M22×1.5. 5.5 Outer sheath
The insulation performance of the outer sheath of the joint shall comply with the provisions of Section 6.3.5. 5.6 Sealing ring
The rubber used for joint sealing rings shall comply with the provisions of Article 5.6 of GB9326.3. 5.7 The performance of the joint
joint shall comply with the provisions of various tests in Chapter 6. 6 Test items and methods
6.1
The test items and methods are specified in Table 2.
Table 2
Serial number
1
2
3
4
5
6| |tt||7
8
9
10
11
Parts test
Joint test after assembly||tt| |Test items
Structural inspection
Metal shell hydraulic test
Paper drum oil sample test
Conductor connection mechanical and electrical performance test
Joint oil sample Test
AC long-term withstand voltage test
Lightning impulse voltage test
Operation impulse voltage test
Outer sheath withstand voltage test
Plug the joint oil circuit Stop test
Joint hydraulic test
Technical requirements clause
5.1, 5.3
5.4.2
6.2.2
6.2. 3
6.3.1
6.3.2
6.3.3
6.3.4
5.5
5.3.2||tt ||6.3.7
Test type
T,R
T,R
T,s
T
T|| tt||T
T
T
T
T
T
Visual inspection
Test method||tt ||Section 6.2.1 of this standard
GB507
Section 6.2.3 of this standard
GB507
GB3048.8
GB311||tt ||GB311
GB 3048.8,GB 311
Section 6.3.6 of this standard
Section 6.3.7 of this standard
6.2 Parts test||tt| |6.2.1 Metal shell hydraulic test
GB9326.4-88
If the metal shell is composed of multiple segments, this test can be performed in segments. During the test, both ends of the specimen to be tested shall be sealed, and hydraulic pressure shall be applied to twice the maximum design pressure for 30 minutes. The test results shall comply with the provisions of Section 5.4.2. 6.2.2 Paper drum oil sample test
The cable oil sampling test results in the paper drum should comply with the provisions of GB9326.3 Section 6.2.3. 6.2.3 Mechanical and electrical performance tests of conductor connections are under consideration. 6.3 Post-assembly joint test
Each joint sample for type test must first undergo the test in Section 6.3.1. Only after passing the test can subsequent tests be carried out. The tests specified in Clauses 6.3.2, 6.3.3 and 6.3.4 may be carried out on three joint specimens respectively, or on only one specimen. If more than one test is performed on a joint 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 joint specimen. The cable used to install the joint specimen should be the same as or higher than the rated voltage of the joint specimen. 6.3.1 Joint oil sample testbzxZ.net
24 hours after the joint is assembled, take an oil sample from the joint for test. The test results should comply with the provisions of GB9326.3 Section 6.2.3. 6.3.2 AC long-term withstand voltage test
According to the provisions of GB9326.2 Section 7.4.2, the joint and the cable are subjected to the AC long-term withstand voltage test, and the joint sample should not break down. 6.3.3 Lightning impulse voltage test
According to the provisions of GB9326.2 Section 7.4.3, the connector and cable are subjected to lightning impulse voltage test together, and the connector sample should not break down. 6.3.4 Operation impulse voltage test
The 330kV joint shall be in accordance with the provisions of GB9326.2 Section 7.4.4. The joint and the cable shall be subjected to the operation impulse voltage test together. The joint sample shall not break down.
6.3.5 Outer sheath voltage withstand test
The outer sheath shall be subjected to a DC withstand voltage test in accordance with the provisions of GB9326.2 Section 7.2.6, and in accordance with the GB9326.2 Section 7.4.7 It is stipulated that the impact withstand voltage test shall be carried out (the joint sample shall not be bent or scraped), and the sheath shall not undergo breakdown or flashover. 6.3.6 Plug joint oil line plug test
At ambient temperature, apply 1.5 times the maximum design pressure difference between the high pressure side and low pressure side of the plug joint for 48h, low pressure Side hydraulic pressure should not increase. During the test, the high-pressure side oil pressure is allowed to be replenished at any time. 6.3.7 Joint hydraulic test
Both ends of the joint are sealed, and hydraulic pressure is charged to twice the maximum design pressure at ambient temperature for 15 minutes. There should be no leakage in the joint. 7 Acceptance rules
7.1 Products must be inspected by the manufacturing technical inspection department 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 2. 7.2.1 The sampling test is 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 is unqualified, the test should be carried out barrel by barrel, and the oil of the unqualified barrel should be changed. Or reprocess the paper roll until it is qualified. 7.2.2 If the provisions of Sections 6.3.2, 6.3.3, and 6.3.4 are not met, new samples may be made in double the quantity, retesting of unqualified items shall be made, and final assessment shall be made.
7.2.3 When the provisions of Sections 6.3.6 and 6.3.7 are not met, the leaking parts are allowed to be replaced until they meet the requirements. 7.2.4 If it does not meet the requirements of Section 6.2.1, it is allowed to be repaired and re-tested until it meets the requirements. 8 Product Marking and Packaging
8.1 Mark
GB9326.4-88
8.1.1 A metal plate should be installed on the shell of the joint to indicate: manufacturer name;||tt ||a.
Model and specification;
b.
c.
d.
Rated voltage;
Year and month of manufacture .
8.1.2
Two paper labels should be attached to the inner insulation drum or directly printed with paint to indicate: a.
Model and specification;
b. Paper roll serial number;
The number of paper rolls.
c.
8.1.3 The side of the packaging box should be marked with words and symbols such as "handle with care", "rainproof" and "no inversion". 8.2 Packaging
8.2.1 All product parts, including paper drums, should be packed in complete sets in special packaging boxes before leaving the factory. The product certificate and packing list should be attached inside the box.
8.2.2 The inner insulation paper drum should be sealed without leakage. 8.2.3 The epoxy resin parts of plug joints should be stuffed with soft paper or plastic to avoid damage from collision with other parts in the box. 8.2.4 Each set of plug joints should be equipped with two valves and two insulated connecting pipes. 9Transportation and storage
9.1 During transportation, the packaging box must not be inverted or collided. 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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