This standard specifies the test conditions, requirements and methods for common test items of AC high-voltage current-limiting fuses and ejection fuses (hereinafter referred to as fuses). Other test items for different types of fuses that differ in test requirements and methods shall be specified by the standards of the fuses themselves. This standard applies to indoor or outdoor fuses used in AC power systems with a rated voltage of 3~63kV and a frequency of 50Hz. GB/T 15166.4-1994 General test methods for AC high-voltage fuses GB/T15166.4-1994 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Alternating-current high-voltage fuses
General test method
CB/T 15166.4—94
This standard adopts the International Electrotechnical Commission (IEC) publications 282-1 "Current-limiting fuses" (1985 edition), 282-2 "Jet-type and similar fuses" (1970 edition) and 282-2 Amendment 1 (1978 edition). 1 Subject content and scope of application
This standard specifies the test items, requirements and methods for the common test items of AC high-voltage current-limiting fuses and jet-type fuses (hereinafter referred to as fuses): For different types of fuses, other test items that are different in test requirements and methods shall be specified by the standards of the fuses.
This standard applies to indoor or outdoor fuses used in AC power systems with rated voltages of 3~63kV and frequencies of 50Hz. 2 Reference standards
GB311.2~311.6 High voltage test technology
GB763 Heat generation of AC high voltage electrical appliances during long-term operation GB4585.2 Artificial pollution test for high voltage insulators for AC systems - solid layer method GB7453 Partial discharge measurement
GH/T15166.1 Terminology of AC high voltage fuses 3 Terminology
The terms used in this standard shall comply with the provisions of GB/T15166.1. 4 Test items
Insulation test (including lightning impulse test, power frequency voltage test, artificial pollution transfer test, partial discharge test); a.
Temperature rise test;
Pre-arcing time-current characteristic test;
d. DC resistance measurement.
When the above items are used as test items, the test results shall be recorded in the test report. The fuse type test report shall include the necessary information to verify compliance with the relevant provisions of this standard and the corresponding standards of the fuse. 5 Common test conditions
Unless otherwise specified, the fuse must meet the following requirements when testing: 51 Environmental conditions
The environmental conditions at the test site shall comply with the provisions of the corresponding standards of the fuse unless otherwise specified in this standard. 5.2 Test product conditions
Approved by the State Administration of Technical Supervision on August 12, 1994 and implemented on February 1, 1995
The test product shall meet the following requirements during the test;
GB/T 15166. 4-94
The test product shall be new, clean and in good condition. The test product shall be installed on a reliably grounded metal frame according to the design requirements and the requirements of normal working conditions. b.
When the test product design specifies multiple installation methods, the test product should be tested under various installation methods. If there is sufficient basis, one or several installation methods that are more stringent for the test product can be selected for testing. c.
The test product should be consistent with the product technical documents and drawings. And it must be a product that has passed factory inspection. 6 Insulation test
Test conditions, requirements and methods shall be in accordance with the provisions of GB 311.2~311.3. 6.1 Test product
In addition to meeting the relevant requirements of GB 311.2, it shall also comply with the provisions of Article 5. Single-phase test products shall be subject to single-phase tests, and three-phase common chassis test products shall be subject to three-phase tests.
6.2 Single-phase test
Single-phase test shall be carried out in accordance with Figure 1 and Table 1. Connection position
6.3 Three-phase test
6. 3. 1 Three-phase test
Figure 1 Single-phase test specimen status
Three-phase test is carried out according to the provisions of Figure 2 and Table 1, A
Connection
Figure 2 Three-phase test specimen status
A, B, C, a, b, c—fuse terminals; F--fuse baseot
Original open position room
Test specimen position
GB/T15166.4—94
Three tests
Pressure part|| tt||Grounding part
TuCbaF
Pressure part
Single-phase test
Grounding part
Note:) When the poles of the test piece are axially symmetrical and the two ends of the disconnection position are symmetrical to the base, the three-phase test only performs serial numbers 2, 1, and 6, and the single-phase test only performs serial numbers 1 and 4.6.
②The disconnection position refers to the state where the current-limiting fuse is in the state where the fuse is removed, the drop-out type is in the normal drop-out state, and the non-drop-out type fuse is in the fused state. ③When the insulation level of the break is higher than that of the ground, the base of the test piece should be properly insulated from the ground during the test. 6.4Lightning impulse withstand voltage test
Only the lightning impulse withstand voltage dry test is performed. The test is conducted on the test piece with the standard lightning impulse wave specified in GB311.3 for 15 seconds each for positive and negative polarity.
The test is carried out with the impulse withstand voltage specified in the corresponding standard of the test product, applied to each pressure-applied part specified in Articles 6.2 and 6.3. If the destructive discharge in the self-restoring insulation does not exceed 2 times, and no destructive discharge occurs in the non-self-restoring insulation, the test product is considered to have passed the required electric impulse withstand voltage test. bZxz.net
6.5 Power frequency withstand voltage test
6.5.11min power frequency withstand voltage test
The test is carried out with the rated withstand voltage specified in the corresponding standard of the test product, applied to each pressure-applied part specified in Articles 6.2 and 6.3 for 1ti11. If no flashover or breakdown discharge occurs in the test, the test product is considered to have passed the 1min power frequency withstand voltage test. 6.5.2 If the test product has solid organic material insulation, a 5min power frequency withstand voltage test shall be carried out on this insulation structure. No flashover or breakdown discharge shall occur during the test. If the solid organic insulating material component has been subjected to a 5nin power frequency withstand voltage assessment, the test product does not need to repeat this test.
6.5.31min power frequency withstand voltage wet test
1 min power frequency withstand voltage wet test is only conducted on the insulation to ground of outdoor products. The test product shall be subjected to 1 min power frequency withstand voltage test under the rain conditions specified in GB311.2. If a flashover occurs on the external white recovery insulation during the test, it is allowed to repeat this test under the same conditions. If no re-flashover or destructive discharge occurs, the test product is considered to have passed the 1 min power frequency withstand voltage condensation test.
6.6 Human pollution migration test
This test item is only conducted on outdoor products. Unless otherwise specified, the test is generally conducted on single-pole products in the connected position. The test method is in accordance with the provisions of GB4585.2.
6.7 Partial discharge test
There may be cavities (such as injected insulation) or insulation layers with different dielectric properties in the solid organic insulation of the fuse, so this test should be conducted. The test can be carried out on insulating parts. The test method shall be in accordance with GB7354, and the allowable discharge capacity shall be specified by the product technical conditions. 7 Temperature rise test
7.1 Test conditions
Except for the test conditions that shall comply with Article 5 and the following provisions, the rest shall comply with the requirements of GB763: 7.1.1 Test product
GB/T 15166.4— 94
Three-pole fuses shall be tested on a fully assembled test product according to the design requirements for three-phase tests, and single-pole fuses shall be tested on a single-phase test. The fuse base shall be tested with the fuse of the maximum rated current specification in the same family series according to the design requirements. Before the test, the test product shall be subjected to normal no-load and on-load operations for no less than 5 times (including normal operation of operable fuses and loading and unloading of fuse-carrying parts of plug-in breakers), and the DC resistance shall be measured according to the manufacturer's regulations. 7.1-2 Electrical connection
Connect the terminal of the test object to the test circuit with a hard bare copper conductor. The length of the conductor should not be less than 1m. It should be arranged horizontally and can be led out horizontally in any direction.
The cross-sectional area of ​​the bare copper conductor used for electrical connection should comply with the provisions of Table 2. Table 2
Rated current of test object, A
251,63
6341200
7.2 Test method
The test method shall comply with the provisions of GB 753.
7.3 Test requirements
Except for the following requirements, it shall comply with the provisions of GB763: Bare conductor cross-sectional area, mm
120~160
250~350
The actual temperature rise value of each part of the test object measured in the test shall not exceed the allowable value specified in the corresponding standard of the fuse. After the test, when the current-carrying conductor of the test crystal cools to the ambient air temperature, measure the resistance value of the fuse. The resistance measured twice before and after the test should be within the allowable range specified in the product technical documents. 8 Pre-test time-current characteristic test
8.1 Test conditions
8.1.1 Fan air temperature
The test can be carried out at any temperature between 15℃ and 30℃ of ambient air temperature. Unless otherwise specified, it should be considered to be applicable to the case of 20℃. At the beginning of each test, the fuse temperature should be sufficiently close to the ambient air temperature. 8.1.2 Test product
The test product shall comply with the provisions of 5.2. During the test, the fuse-carrying parts or fuse-links shall be assembled on the fuse base specified by the manufacturer. 8.1.3 Test product arrangement
The test is carried out on a single-pole test product, and the electrical connection during the test is in accordance with the provisions of 7.1.2. 8.2 Test requirements
This clause only specifies the requirements for the pre-arcing time-current characteristic test. Other characteristic tests can refer to this requirement. 8.2.1 The pre-arcing time-current characteristic
test can be carried out at any convenient voltage not greater than the highest voltage of the fuse under test. The test circuit should keep the test current stable, and its attenuation rate should not exceed 10%. The current is formed into a sine wave without obvious distortion, and the power supply frequency should be within the range of 48-52Hz. The equivalent current value is the arithmetic mean of the initial current value and the termination current value. Data can be obtained from the breaking test as valid data for the pre-arcing time-current characteristic. 8.2.2 Time range
The time range of the pre-arcing time-current characteristic is specified by the corresponding standard of the fuse. 8.3 Current measurement
GB/T 15166.4-94
The current flowing through the test product during the test can be measured by an oscilloscope, ammeter or other suitable instrument. The accuracy of the instrument used should not be lower than 0.5 level. 8.4 Time measurement
The pre-arcing time can be measured by an oscilloscope or other suitable instrument during the test. When recording time with an oscilloscope, it should be noted whether the measured time is the pre-arcing time or the action time. In general, the time recorded by the oscilloscope is the action time, but when the pre-arcing time is greater than (, 1 s) and the test is conducted at low voltage, only the pre-arcing time is recorded. 8.5 Data processing
8.5.1 Drawing the pre-arcing time-current characteristic curve The pre-arcing time·current characteristic curve is drawn using the pre-arcing time obtained from the test and the corresponding current data. The expected current should be used as the horizontal axis and the pre-arcing time as the vertical axis. It should be drawn on a double logarithmic scale coordinate paper. The base ratio of the logarithmic scale of the vertical and horizontal coordinates (the size of the logarithmic scale with a base of 10) should be 1:2 or 1:1, and 12 is recommended as the preferred choice. The curve should be drawn on A3 or A4 standard paper. The scale size must be selected from the following numbers: 2, 4, 8, 16, and 2.8, 5.6, 11.2 cm
Note: It is recommended to use 2. 8 and 5. 6 cm as the preferred values. 8.5.2 Pre-arcing time-current characteristic curve graphic content Pre-arcing time-current characteristic curve shall indicate the following contents: Relationship between pre-arcing time and expected symmetrical current effective value. a.
Model and rating of fuse and fuse to which the curve applies. h.
If the characteristic curve indicates the minimum value of current, the effective point determined by the test shall be within the deviation range specified on the right side of the curve; c.
If the characteristic curve indicates the average value of current, the effective point determined by the test shall be within the deviation range specified on the left and right sides of the curve. The deviation range is specified by the corresponding standard of the fuse.
9 Measurement of DC resistance
9.1 Ambient air temperature and electrical connection
The test can be carried out at any ambient air temperature. Before each test, the test product shall be sufficiently close to the ambient air temperature. The electrical connection shall meet the requirements of the selected measurement method, and any electrical connection shall minimize the measurement error. 9. 2 Test requirements
When the DC resistance value of the product is specified, this test shall be carried out. a
The resistance value measured at the actual ambient air temperature should be converted to the value at 20℃. It should not exceed the specifications of the technical parts. No matter which method is used for testing, the load applied to the test piece itself should not cause the test piece to heat up significantly. 9.3 Measurement method
The DC resistance can be measured by the voltage drop method, bridge method or other methods of measuring base resistance. Additional notes:
This standard is proposed by the Ministry of Machinery and Electronics Industry of the People's Republic of China. This standard is under the jurisdiction of the National High Voltage Switch Standardization Technical Committee. This standard was drafted by the Xi'an High Voltage Electrical Appliance Research Institute, and the main drafters of this standard were Han Xiaoyong, Li Peng and Hou Zhongji.
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