JB/T 7617-1994 Sulfur hexafluoride tank type gapless metal oxide arrester
Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T 7617-1994
Sulfur hexafluoride tank-type gapless metal oxide arrester 1994-12-09 Issued
Ministry of Machinery Industry of the People's Republic of China
1995-06-01 Implementation
Mechanical Industry Standard of the People's Republic of China
Sulfur hexafluoride tank-type gapless metal oxide arrester 1 Subject content and scope of application
JB/T 7617-1994
This standard specifies the technical requirements, test methods, inspection rules and other contents of tank-type AC gapless metal oxide arresters for sulfur hexafluoride enclosed combination electrical appliances.
This standard applies to tank-type gapless metal oxide arresters (hereinafter referred to as arresters) with sulfur hexafluoride gas as the insulating medium for limiting overvoltage in AC power systems.
2 Reference standards
Packaging, storage and transportation pictorial symbols
Insulation coordination of high-voltage power transmission and transformation equipment
GB311.2~311.6 High voltage test technology
GB2900.12
GB2900.19
GB7674
GB8905
GB11023
GB11032
GB12022
3 Terminology|| tt||Electrical terms
Arrester
Electrical termsInsulation coordination and high voltage test technologySulfur hexafluoride enclosed combination electrical appliances
Guidelines for gas management and detection in hexafluoride electrical equipmentSulfur hexafluoride gas sealing test method for high-voltage switchgearAC gapless metal oxide arrester
Industrial sulfur hexafluoride
3.1Can-type gapless metal oxide arresterA lightning arrester composed of metal oxide nonlinear resistors (series and parallel) enclosed in a metal tank and filled with SF. gas as the insulating medium. 3.2Other terms, in accordance with the provisions of GB2900.12, GB2900.19, GB11032 and GB7674. 4 Conditions for use of lightning arresters
4.1 Positive-band use conditions of lightning arresters
4.1.1 The use environment conditions shall comply with the relevant provisions of GB7674: 4.1.2 The frequency of the power supply shall not be less than 48Hz and not more than 62Hz; 4.1.3 The power frequency voltage applied to the lightning arrester for a long time shall not exceed the continuous operating voltage of the lightning arrester. 4.2 Abnormal use conditions of lightning arresters
Other use conditions except the normal use conditions in Article 4.1. Use under abnormal use conditions must be agreed upon by both the supplier and the buyer. 5 Technical requirements
5.1 Manufacturing requirements for lightning arresters
Lightning arresters shall comply with the requirements of this standard and shall be manufactured in accordance with the drawings and documents approved by the prescribed procedures. 5.2 Standard Rated Values of Lightning Arrester
5.2.1 Rated Voltage of Lightning Arrester
Approved by the Ministry of Machinery Industry on December 9, 1994
Implemented on June 1, 1995
JB/T7617-1994
The rated voltage values of lightning arrester are as follows:
72.5, 73, 100, 146, 200, 210, 288, 300, 312, 396, 420.444, 468 kV. 5.2.2 Rated Frequency of Lightning Arrester
The rated frequency of lightning arrester is 50 Hz and 60 Hz. 5.2.3 Nominal discharge current of lightning arrester
The nominal discharge current of lightning arrester is 20kA, 10kA, 5kA and 1kA respectively, and its waveform is 8/20.5.2.4. Rated density or pressure of insulating gas inside lightning arresterSF in lightning arrester. Gas operates at rated density (or pressure). Rated density (or pressure) and minimum operating density (or pressure) shall be clearly specified by the manufacturer.
SF. The rated pressure of gas at 20C is generally 0.3, 0.35, 0.4, 0.5, 0.6MPa. 5.2.5 Quality requirements of sulfur hexafluoride gas
New SF. The quality requirements of gas shall comply with the provisions of GB12022 standard. SF in lightning arrester. The acceptance value of gas moisture content is 250PPM (volume ratio), SF in operation, and the quality requirements of gas shall be agreed upon by the user and the manufacturer.
5.3 Maximum residual voltage value of lightning arrester
The maximum residual voltage and minimum DC reference voltage of the lightning arrester under steep wave impulse current, lightning impulse current and operation impulse current shall comply with the provisions of Table 1 and Table 2, and the current impulse withstand test requirements of the lightning arrester. 5.4
The lightning arrester shall withstand the line discharge level specified in Table 3 and the square filter current and large current impulse withstand test specified in the sampling test. The line discharge and square wave current impulse withstand test shall be repeated 18 times without breakdown, flashover or damage. The residual voltage change under the nominal discharge current before and after the test shall not exceed 5%. The large current impulse withstand test shall be repeated twice without breakdown, flashover or damage. Table 1
Lightning arrester
Arrester
Nominal current 20kA level
steep surge lightning surge operating surge
System rated
Continuous operation
Strike current
Rated voltage
Operation voltage
Strike current
Nominal current 10kA level
Key surge lightning surge operating surge DC
Nominal current 5kA level
Step surge lightning surge operating surge DC| |tt||Strike current
Strike currentStrike currentStrike current
Strike rangeStrike current
Residual voltageResidual voltage diagramResidual voltageResidual voltageResidual voltageResidual voltageReference voltageResidual voltageResidual voltageReference voltage
Not greater thanNot greater than
Not greater than
Not less than
Residual voltage,
Not greater thanNot greater than
Not less than
Not greater thanNot greater thanNot less than
Lightning arrester Rated voltage
System rated voltage
New rated voltage of lightning arrester
Line discharge level
2ms square wave
Current tolerance
A (peak signal)
High current impulse tolerance
kA (earning value)
Sealing performance of lightning arrester
JB/T7617-1994
Maximum residual voltage value of transformer neutral point lightning arrester Nominal discharge current 1kA level
System rated voltage Voltage
Lightning impulse current residual voltage
Not greater than
Operation impulse current pressure
Not greater than
Arrester current impulse withstand value
396-468
Neutral point arrester
73-210
DC 1mA
Reference voltage
Not greater than
See Table 4 in Article 7.4.2 of EC99-4
Arrester should have reliable sealing. During the service life of the arrester, the operating performance of the arrester should not be affected by poor sealing. The annual leakage rate of SF gas should be less than 1%/year.
5.6 Pressure release of lightning arrester
Lightning arrester is generally not equipped with pressure release device, and the metal outer wall is required to have sufficient strength to withstand the fault current and duration specified in GB7674 for fully enclosed combination electrical appliances without rupture or leakage. 5.7 Continuous current of lightning arrester
The continuous current passing through the lightning arrester under continuous operating voltage shall not exceed the specified value, which is specified by the manufacturer. 5.8 Action load characteristics of lightning arrester
To ensure the reliable operation of the lightning arrester, the arrester shall pass the action load test and shall not have breakdown, flashover and other phenomena. After the test, the change of the residual voltage value under the nominal discharge current shall not exceed 5%. 5.9 Power frequency voltage tolerance time characteristics of lightning arrester The lightning arrester shall have a certain rated overvoltage tolerance capability, and the manufacturer shall provide the corresponding tolerance characteristics. For the lightning arrester of the 110~500kV neutral point effective grounding system, 0.1s, 1s, 30s, and 20min power frequency electrical tolerance characteristic curves shall be provided. The arrester should withstand the rated voltage for no less than 10 seconds. For the 66kV arrester in the neutral point non-effectively grounded system, it should withstand 2 hours at 1.2 times the rated voltage and 24 hours at the rated voltage.
5.10 Internal insulation withstand performance of the arrester
The insulation withstand voltage inside the arrester magnet should comply with the provisions of GB311 for high-voltage electrical insulation. The test should be carried out at the specified alarm pressure (minimum operating density). The insulation withstand level of the arrester cannot be guaranteed below this pressure. 3
JB/T7617-1994
5.11 Partial discharge characteristics of the arrester
The internal discharge of the arrester at 1.1 times the continuous operating voltage should not be greater than 10Pc. 5.12 Zero gauge pressure tolerance requirements
SF inside the arrester. When the gas pressure is zero gauge pressure, it should withstand 1.2Um and 1.1~1.3 times Um//3 maximum phase voltage, 5min. The requirements for different voltage levels are:
110kV~220kV
5.13 Arrester casing requirements
5.13.1 General requirements
The metal casing of the arrester should be equipped with a firm grounding device, and the shell can withstand the normal and transient pressures that occur during operation. 5.13.2 Shell design
Whether the shell is welded or cast, the design calculation of its thickness and structure can be carried out according to the requirements of the pressure vessel, and the effects of vibration, temperature changes, short-circuit current and climatic conditions should be considered. 5.13.3 Shell strength test
Whether the strength of the shell and components is determined by calculation or not, the prescribed tests should be carried out. 5.13.3.1 Destructive pressure test
The destructive pressure test shall not be less than 3.5 times the design pressure, and the shell shall not be damaged. 5.13.3.2 Non-destructive pressure test
Each shell shall withstand the specified pressure test without deformation and gas leakage. The test pressure is K times the design pressure: K=1.3 for welded shells and K=1.5 for cast shells. 5.13.3.3 Shell inspection
For welded shells, except for parts that cannot be inspected, non-destructive inspection shall be carried out in accordance with regulations. 5.13.4 Requirements for installing explosion-proof membrane
When the shell is equipped with an explosion-proof membrane pressure release device, the relationship between its operating pressure and the design pressure of the shell shall be properly coordinated to reduce unnecessary dry bursting of the explosion-proof membrane.
5.13.5 Certification
The shell manufacturer shall provide a material test certification for the shell material. 5.14 Transportation vibration performance of lightning arrester
The structure of lightning arrester shall be firm and meet the requirements of transportation without damage. 5.15 Power frequency reference voltage of lightning arrester
The power frequency reference voltage value (peak value divided by √2) under the power frequency reference current shall be measured for the whole lightning arrester, and the power frequency reference current value shall be specified by the manufacturer.
6 Test method
Measuring device and accuracy
Except as clearly specified in this standard, others shall comply with Article 6.1 of GB11032. 6.2 Test product
If the test product is a proportional element, the test shall be carried out in SF gas medium, and it is also allowed to be carried out in air. Other test products shall comply with the provisions of GB11032.
6.3 Continuous current test
This test shall be carried out on the whole lightning arrester, and a continuous operating voltage shall be applied to the test product to measure the total current and resistive current passing through the test product. 4
6.4 Power frequency reference voltage test
JB/T 7617-1994
The test method shall comply with Article 6.7 of GB11032. 6.5 DC test voltage test
Before the arrester is assembled, a DC voltage is applied to all the resistors in the tank. When the current value passing through the resistor is equal to 1mA, the voltage value on it is measured. Other test methods shall comply with Article 6.8 of GB11032. 6.6 Residual voltage test
The residual voltage under the steep wave impulse current, lightning impulse current and operation impulse current of the arrester shall comply with Article 6.4 of GB11032. The test shall be carried out in SF. gas or in air. 6.7 Large current impulse withstand test
The test method shall comply with Article 6.5 of GB11032. The test shall be carried out in SF. gas or in air. 6.8 The test method of line discharge withstand and square wave current impulse withstand test shall comply with the provisions of Article 6.6 of GB11032. The test shall be carried out in SF. gas or in air. 6.9 Action load test
6.9.1 Accelerated aging test
This test is to determine the power frequency voltage U. and U. applied when the action load test is carried out on the resistor that has not been subjected to the accelerated aging test. The test shall be carried out in a container filled with SF. gas to determine the effect of SF. gas on the aging performance of the resistor. If the manufacturer proves through tests that the accelerated aging test carried out in air is equivalent to the accelerated aging test carried out in SF. gas, the accelerated aging test may be carried out in air in the future.
6.9.2 Action load test
The action load test method shall comply with the provisions of Article 6.10 of GB11032. The test shall be carried out in SF. gas or in air. 6.10 The test method of power frequency voltage withstand time characteristic test shall comply with the provisions of Article 6.11 of GB11032. The test shall be carried out in SF gas or in air. 6.11 Internal insulation withstand test
During the test, the zinc oxide resistor inside the arrester shall be removed, and the insulation support and other parts that usually bear voltage shall be tested. For the test products of the combination of self-restoring insulation and non-self-restoring insulation of the tank-type zinc oxide arrester, the withstand voltage test requirements and methods shall be implemented in accordance with the provisions of GB311.3 for combined insulation.
6.12 Partial discharge test
The test method shall comply with the provisions of Article 6.9 of GB11032. 6.13 Zero gauge pressure withstand test
The test shall be carried out on the entire arrester. When the pressure of the SF gas inside the tank is zero gauge pressure, it shall withstand the specified value without breakdown or flashover. The test method shall comply with the relevant provisions of GB311. 6.14 Sealing performance test
Fill the arrester with SF gas of rated pressure, cover all sealing surfaces, joints, etc. of the tank with plastic sheeting, and use a highly sensitive SF gas leak detector to measure the amount of SF gas in the plastic sheeting after 24 hours. The annual gas leakage rate should be less than 1%/year. For detailed test methods, see GB11032.
6.15 Transportation test
The entire arrester should be placed upright and fixed on a truck, and transported for 300km on a Class III highway at a speed of 25-35km/h, with 10 emergency trucks. After the test, the resistor plate pressure equalizing cover in the tank should not be significantly deformed and the screws should not be loose. 6.16 Shell strength test
6.16.1 Destruction pressure test
The destructive pressure test adopts the water pressure method. The pressure rise rate should not be greater than 400kPa/min, and the destructive pressure test value should not be less than 3.5 times the design pressure. The shell after the test shall not be used even if it is intact. The destructive pressure test mainly evaluates the reliability and safety margin of the shell design and process. This test is a type test. 5
6.16.2 Non-destructive pressure test
JB/T7617-1994
All shells shall be subjected to routine water pressure test after manufacture. The test method shall be in accordance with Article 5.8.6 of GB7674. 6.16.3 Inspection of shell welds
6.16.3.1 All welds shall be visually inspected. There shall be no cracks, bubbles, pinholes, weld nodules and shrinkage cavities. The welds shall be smooth and free of sharp corners and burrs.
6.16.3.2 All straight welds shall be inspected by X-ray flaw detection. 6.16.3.3 All girth welds shall be inspected by twilight method. 6.17SF. Gas moisture detection
The test method for moisture detection shall be in accordance with GB8905. Inspection rules
The inspection of lightning arresters is divided into five types: factory test, sampling test, type test, periodic test and acceptance test. 7.! Factory test
The lightning arrester (or resistor) leaving the factory shall be inspected in accordance with the provisions of Table 4. If one of the tests fails, the lightning arrester is considered unqualified. Table 4 Lightning arrester delivery test items
7.2 Sample throwing test
Test name
Continuous current test
Nominal discharge current residual voltage test
Insulator voltage test
DC voltage test
Sealing performance test
Partial discharge test
Voltage strength test
SF. Moisture detection in gas
Test basis
Article 5.13.3.2
Article 5.13.3.3
Test method
Article 6.16.2
Article 6.16.3
The sampling test is mainly carried out on the shielding sheet, and the samples should be sampled in batches. The test items and the number of samples are shown in Table 5. Table 5 Sampling (spot check) test items
Test name
Square wave current impulse withstand test
Large current impulse withstand test
Aging test
Test basis
Number of samples
(Not less than 5 pieces)
(Less than 5 pieces)
3 test pieces
All resistors
Retainer
All resistors before assembly
Retainer
Retainer
Test method
7.3 Type test
When new products are trial-produced, all type tests must be carried out. The test should be carried out according to the provisions of Table 6. When the design or process is changed and affects the product performance, the relevant test items must be tested. Sequence
Continuous current test
Residual voltage test
Long duration current withstand test
Power frequency voltage withstand time characteristic test
Action load test
Power frequency reference voltage test
DC reference voltage test
Sealing performance test
Partial discharge test
Internal insulation withstand test
Zero gauge pressure withstand test
Transportation test
Bright body strength test
SF. Gas moisture detection
JB/T7617-1994
Table 6 Type test items
Test basis
Periodic test
In order to monitor product quality, the products must be tested regularly every three years. Test
1 lightning arrester
3 proportional units
3 proportional units
4 proportional units
3 proportional units
1 egg arrester
All resistors before assembly
1 lightning arrester
1 painting arrester
1 lightning arrester (excluding internal resistors)
1 lightning arrester
1 lightning arrester
1 shell
1 lightning arrester
Length Regular tests should be carried out when production is resumed after suspension. Regular tests should be taken from products in normal production, and the test items are shown in Table 7. Table 7 Periodic test items
Residual voltage test
Long duration current withstand test
Action load test
Power frequency voltage withstand time characteristic test
Acceptance test
Test according to
When the orderer stipulates acceptance test in the order agreement, the following tests shall be carried out 8
Appearance inspection: Check whether the appearance, nameplate and its accessories are missing or damaged; Continuous current test:
Power frequency reference voltage test;
Partial discharge test:
Sealing test:
Residual voltage test of lightning arrester;
SF, gas moisture detection.
Packaging,
Marking,
Transportation, Storage and Warranty Period
The nameplate of the arrester should clearly indicate: a.
Arrester name and model,
3 proportional units
3 proportional units
3 proportional units
4 proportional units
Arrester rated voltage:
Continuous operating voltage of the arrester;
JB/T7617-1994
Rated density or pressure of SF gas inside the arrester; d.
Manufacturer name and trademark,
f, manufacturing year and production product number. The packaging of the arrester must ensure that the product is not damaged during transportation due to poor packaging. The following should be noted on the packing box: a.
Product name, model and manufacturer name,
Shipping unit, consignee and detailed address; product net weight, gross weight, volume, etc.,
d. "Handle with care", "Upward" and other words and marks, which should also comply with the requirements of GB191. 8.3 Technical documents provided with the product:
Packing list,
b. Product factory acceptance certificate,
c. Installation and operating instructions.
8.4 Transportation and storage
The product must be placed upright during transportation, loading and unloading, and storage. It is not allowed to be placed sideways, tilted or lying. During transportation, the arrester has SF inside. The gas should be kept at positive pressure, generally the gauge pressure is 0.02 ~ 0.05MPa (0.2 ~ 0.5kgl/cm). The arrester should be stored in a clean and dry workshop before installation and use, and should not be corroded by corrosive gases or liquids. 8.5 Warranty period
If the user complies with the transportation, storage and use rules specified by the manufacturer, the manufacturer shall repair or replace the product free of charge within two years from the date of shipment from the manufacturer if the product is damaged or cannot operate normally due to poor quality. Additional notes:
This standard is proposed by the National Technical Committee for Standardization of Lightning Arrester. This standard is under the jurisdiction of Xi'an Electric Ceramics Research Institute. This standard is entrusted to Xi'an Electric Ceramics Research Institute for interpretation. This standard is drafted by Xi'an High Voltage Electric Ceramics Factory. The main drafter of this standard is Duan Qingcheng.
People's Republic of China
Mechanical Industry Standard
Sulfur hexafluoride tank type gapless metal oxide arrester JB/T 7617—1994
Published and issued by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2 Shouti South Road, Beijing
Format 880×12301/16
Edition X, XX, 19XX
Printing 1-XXX
Postal Code 100044)
Sheet X/X
Number of words XXX,XXX
Printing X, XX, 19XXwww.bzxz.net
Price XXX.XX Yuan
XX-XXX
Mechanical Industry Standard Service Network: http://www.JB.ac.cn661_9Product factory certificate,
c, installation and use instructions.
8.4 Transportation and storage
Products must be placed upright during transportation, loading and unloading, and storage. They are not allowed to be placed sideways, tilted, or lying. During transportation, the arrester has internal SF. The gas should be kept at a positive pressure, and the general gauge pressure is 0.02~0.05MPa (0.2~0.5kgl/cm). Before installation and use, the arrester should be stored in a clean and dry factory building and should not be corroded by corrosive gases or liquids. 8.5 Warranty period
If the user complies with the transportation, storage and use rules stipulated by the manufacturer, the manufacturer shall repair or replace the product free of charge within two years from the date of shipment from the manufacturer if the product is damaged or cannot operate normally due to poor quality. Additional notes:
This standard is proposed by the National Technical Committee for Standardization of Lightning Arrester. This standard is under the jurisdiction of the Xi'an Electric Ceramics Research Institute. This standard is entrusted to the Xi'an Electric Ceramics Research Institute for interpretation. This standard was drafted by Xi'an High Voltage Porcelain Factory and the main drafter of this standard is Duan Qingcheng.
People's Republic of China
Mechanical Industry Standard
Sulfur hexafluoride tank type gapless metal oxide arrester JB/T 7617—1994
Published and issued by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2 Shouti South Road, Beijing
Format 880×12301/16
Edition X, XX, 19XX
Printing 1-XXX
Postal Code 100044)
Sheet X/X
Number of words XXX,XXX
Printing X, XX, 19XX
Price XXX.XX Yuan
XX-XXX
Mechanical Industry Standard Service Network: http://www.JB.ac.cn661_9Product factory certificate,
c, installation and use instructions.
8.4 Transportation and storage
Products must be placed upright during transportation, loading and unloading, and storage. They are not allowed to be placed sideways, tilted, or lying. During transportation, the arrester has internal SF. The gas should be kept at a positive pressure, and the general gauge pressure is 0.02~0.05MPa (0.2~0.5kgl/cm). Before installation and use, the arrester should be stored in a clean and dry factory building and should not be corroded by corrosive gases or liquids. 8.5 Warranty period
If the user complies with the transportation, storage and use rules stipulated by the manufacturer, the manufacturer shall repair or replace the product free of charge within two years from the date of shipment from the manufacturer if the product is damaged or cannot operate normally due to poor quality. Additional notes:
This standard is proposed by the National Technical Committee for Standardization of Lightning Arrester. This standard is under the jurisdiction of the Xi'an Electric Ceramics Research Institute. This standard is entrusted to the Xi'an Electric Ceramics Research Institute for interpretation. This standard was drafted by Xi'an High Voltage Porcelain Factory and the main drafter of this standard is Duan Qingcheng.
People's Republic of China
Mechanical Industry Standard
Sulfur hexafluoride tank type gapless metal oxide arrester JB/T 7617—1994
Published and issued by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2 Shouti South Road, Beijing
Format 880×12301/16
Edition X, XX, 19XX
Printing 1-XXX
Postal Code 100044)
Sheet X/X
Number of words XXX,XXX
Printing X, XX, 19XX
Price XXX.XX Yuan
XX-XXX
Mechanical Industry Standard Service Network: http://www.JB.ac.cn661_9
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