GB 18489-2001 General requirements and safety requirements for capacitors for use in tubular fluorescent lamps and other discharge lamp circuits
Some standard content:
GB184892001
All technical contents of this standard are mandatory. This standard is equivalent to the international standard IEC61048:1991 "Capacitors for Tubular Fluorescent Lamps and Other Discharge Lamp Circuits - General Requirements and Safety Requirements", as well as two amendments in 1995 and 1999, and is consistent with the original IFEC in terms of technical content and format. Some of the other IFC and IS () standards cited in IEC61048:1999 have been formulated as national standards in my country, and some have not yet been formulated in my country. In this standard, those that have been formulated as Chinese standards are listed with the Chinese standard number, and the corresponding IEC, ISO standard number is listed in brackets: those that have not been formulated as Chinese standards are directly cited international standards, and the IEC standard number and standard name are listed: Appendix A and Appendix B of this standard are standard appendices. Appendix C of this standard is a suggested appendix
This standard was proposed by the State Bureau of Light Industry.
This standard is under the jurisdiction of the Electric Light Source and Its Accessories Branch of the National Technical Committee for Standardization of Lighting Appliances. This standard was drafted at the expense of Fujian Yuanguang Yaming Electric Co., Ltd., Anhui Ningguo Electric Co., Ltd., and Beijing Electric Light Source Research Institute.
The main drafters of this standard are: Wang Jun, Zhang Hequan, Wen Youbo, and Zhang Ruo. 571
GB 184892001
IEC Foreword
1) IEC's formal resolutions and decisions on technical issues express the international consensus on various issues to the greatest extent possible, because each technical committee has representatives from the national committees that are interested in the issue. 2) Recommended standards, technical specifications, technical reports or guidelines published for international use are, in a sense, all produced by national committees.
3) In order to promote international unification, IEC national committees should ensure that IEC international standards are adopted as much as possible in their national and regional standards. Any differences between IEC standards and national or regional standards should be clearly stated in the latter. 4) The IEC committee does not provide any mark indicating conformity certification and does not assume any responsibility for any equipment that claims to comply with a certain standard of the IEC committee.
IEC61048 international standard is formulated by IEC34 technical committee (lamps and related annexes) 34C sub-technical committee (gas discharge lamps annex>).
The content of this standard and its No. 1 and No. 2 amendments are based on the following documents:
34C(CO)175
34C/308/FDIS
34E/432/FLIS
Voting report
34C(CO)183
34C/336/RVD
34C/446/RVD
Details of the voting results of this standard can be found in the voting report listed in the table above. Appendix A and Appendix B are the official contents of this standard. Appendix ℃ is for reference only.
1 Overview
1.1 Specification
National Standard of the People's Republic of China
General requirements and safety requirements for capacitors for tubular fluorescent lamps and other discharge lamp circuits
Capacitors This standard specifies the requirements for self-healing and non-self-healing capacitors with rated voltage not exceeding 1 000 V, power not less than (0.1 μF, reactive power not exceeding 2.5 kvar, and capable of continuously withstanding AC voltage. The capacitors are used at working rates of 50 Hz or 60 Hz and at altitudes not exceeding 3000 m discharge lamp circuit.
This standard covers capacitors used in parallel, series or series-parallel combinations with lamp circuits. This standard covers only impregnated or non-impregnated capacitors insulated with paper or plastic film or with a combination of the two, which are metallized or have metal foil electrodes.
This standard does not include radio frequency interference suppression capacitors. For the requirements of this type of capacitors, see GB/T14472. The tests in this standard are type tests. They do not include tests on individual capacitors during the production process. 1.2 References
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. At the time of publication of this standard, the versions shown are valid. All standards are subject to revision, so the parties to this standard should explore the possibility of using the latest versions of the following standards. GB/T2423.3--1993 Basic environmental test procedures for electrical and electronic products Ca: Steady-state damp heat test method (eqv IEC 60068-2-3:1984)
GB4208--1993 External protection degree (IP code) (eqvIEC60529:1989) CB/T 4687-1981 Terminology of paper, board and pulp Part 1 (neqIS0) 4046:1978) GB/I5169.51997 Fire hazard test for electric and electronic products Part 2: Test methods Part 2: Needle flame test (idt IEC 60695-2-2:1991)
GB/T 5169.12-1999 Fire hazard test for electric and electronic products Test methods Glow-wire flammability test of materials Gid+ IFC 60695 2-1/2:1994)
* For this type of lamp and its matching ballast, see the following standards: GB23131593 Ballasts for tubular aura lamps - General requirements and safety requirements idtIEC60920:1990 GB106821989 Fluorescent lamps for general lighting neTE60081:1981 G1114043--1993 Ballasts for discharge lamps (except tubular fluorescent lamps) - General requirements and safety requirements Safety requirements eq[EC(0922:1989QB/T2051--1994Fluorescent commercial pressure lamp 124IEC60188:1588IEC60192:1988Low pressure sodium lamp
Approved by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on November 2, 2001 and implemented on June 1, 2002
GR18489-2001
GB 7000.1—1996 Luminaires—General safety requirements and tests (idt IEC 60598-1:1902) GB/T98151998 Fuses for household and similar purposes (idt IEC60241:1968) GB13539—1992 Pressure fuses (neq IFC60269) G13/144721958 Fixed circuit breakers for electronic equipment Part 14: Sectional specification Fixed circuit breakers for suppressing electromagnetic interference in power supplies (idt 1EC 60384-14:1993)
GB/T 18504—20014
Capacitors for use in circuits of tubular fluorescent lamps and other discharge lamps: Performance requirements (eqVIEC61049:1991)IEC60410:1973 Sampling plans and procedures for inspection by counting 2 Definitions
This standard adopts the following definitions:
2.1 Rated voltage (Un) Rated voltage (U.) The effective value of the sine wave voltage marked on the capacitor 2.2 Rated maximum temperature (t.) Rated maximum temperature (t.) refers to the temperature that the hottest part of the capacitor surface must not exceed during operation. Note: Although the internal loss of the capacitor is not large, it will cause the surface temperature to exceed the ambient temperature, so appropriate margin should be left for this. 2.3 Rated minimum temperature refers to the temperature below which any part of the capacitor surface must not be energized. 2.4 Discharge resistor discharge resistor refers to the resistance across the capacitor terminals, used to reduce the risk of shock caused by the charge stored in the capacitor. 2.5 Loss Angle (RAN) Langenar Loss Angle (LAN8) refers to the value obtained by dividing the power loss of the capacitor by the reactive power of the capacitor under the rated frequency and sine wave voltage. 2.6 Self-healing
refers to the process in which the electrical characteristics of the capacitor quickly and basically recover to the value before the breakdown after a local dielectric breakdown occurs. 2.7 Type test Type test refers to one or a series of tests conducted on type samples, the purpose of which is to verify whether the design of a given product meets the requirements of the relevant standards. 2.8 Type test 3 refers to a sample consisting of one or more phase-to-phase complete parts submitted by the manufacturer or distributor for type test 2.9 Capacitor of type A Self-healing shunt capacitor without circuit breaker. 2.10 Capacitor of type B Self-healing capacitor or self-healing shunt capacitor with circuit breaker for series lighting circuit. 3 General requirements Capacitors should be designed to function safely in normal use without causing harm to personnel and surrounding objects. All exposed metal parts should be made of non-ferrous metals or have anti-corrosion protection. No obvious corrosion of the product should be found. The test in Section 11 can show whether the capacitor has sufficient anti-rust protection. The inspection method for mechanical integrity is to be determined. The inspection method for the requirements of Chapters 3 to 10 is to conduct measurement, visual inspection and all test items specified in this standard. 4 General precautions in the test The test carried out in accordance with this standard is a type test. Note: The requirements and tolerances specified in this standard refer to the tests carried out on the type samples submitted for this date. The passing of the type samples does not guarantee that all the products of the manufacturer meet the safety standards. In addition to the type test, the manufacturer is responsible for ensuring that the products are qualified, including routine tests and quality assurance measures. Capacitors should be subjected to the tests specified in Chapter 1. Unless otherwise specified, the tests should be carried out at an ambient temperature of 20°C ± 5°C and the appropriate power supply voltage specified in Appendix A should be used. The tolerance of the test temperature specified in each clause is ±2, unless otherwise specified. Unless otherwise specified, if the number of unqualified products of a certain type of capacitor in a test specified in a certain clause does not exceed one, it is considered to have passed the test. If the number of unqualified products is three or more, the type is considered unqualified. If in a certain test, the number of unqualified products is two, the same number of capacitors should be used to repeat the test and the test items that may affect the test results before this: if unqualified products appear again in the retest, the type is considered unqualified. Note: Among the tests carried out according to the requirements of this standard, only one repeated test is allowed. For the damaged test specified in Article 17, if serious damage is found, repeated tests are not allowed.
For series of capacitors of similar construction, rated voltage and cross-sectional area, when divided according to the requirements of Chapter 11, the number of capacitors with the highest and lowest capacitances in the series contained in each series should be as equal as possible. In addition, the manufacturer should provide the capacitance ratio per unit total surface area of the casing for each capacitance in the series. If this ratio exceeds 10% of the highest capacitance in the series, the capacitor with the highest capacitance per unit surface area should also be tested. Similarly, if this ratio is less than 1/1 of the lowest capacitance in the series, the capacitor with the lowest capacitance per unit area should be tested. "Area" refers to the total area of the external surface of the capacitor casing, small protrusions, terminals and fixing posts are ignored. When testing according to this procedure, all appliances with medium capacitance in the series can be considered to have passed the test. Xiang
"Similar structure" refers to the same dielectric material, the same dielectric strength, the same shell type (gold-bottomed or plastic), the same filler or impregnant type, the same safety device, and the same metallization material (for example: zinc or aluminum). 2 "Cut-out shape" includes round, shaped, round, etc. 5 Marks
5.1 The capacitor should have the following clear markings: a) the name or trademark of the manufacturer or seller, 6) the manufacturer's product catalog number (or) reference model: c) rated capacitance and tolerance; d) rated voltage; e) when equipped with a discharge resistor, it should be marked with the symbol -; f) when equipped with a fuse, it should be marked with the symbol -; g) rated frequency or frequency range; h) rated minimum and maximum temperature, for example: -10/70; i) self-healing capacitor ,Symbols to be marked:
i) For non-white capacitors specially connected in series, the symbol should be marked. . ;This symbol shall not appear on capacitors with self-healing symbols. Note: This type of capacitor shall not be connected across the main power supply. k) Class A or Class B shall be marked according to the function.
5.2 Supplementary markings
a) When equipped with a discharge resistor, its resistance value shall be marked. b) Whether the capacitor contains a substance that will become liquid at (t. "10) ℃ shall be marked. 5.3 The marking shall be clear and durable
Inspection method: Visual inspection is sufficient, and a soft cloth soaked in water and a soft cloth without gasoline are used to gently wipe for 15s: the marking shall still be clear after wiping.
GB18489-2001
Note: The gasoline used shall be composed of solvent hexane, and the maximum amount of aromatics contained shall be 0. 1 Volume percentage, the value of shell rosin butanol is 29, the initial boiling point is about 65℃, the decomposition temperature is 69℃. The density is about 0.68g/cm%. 6 Terminal structure
6.1 The terminal structure is called the cable (connector) or terminal (thread, thread, welding piece or similar element). The wire size and number used in the terminal structure should be compatible with the rated value and purpose of the capacitor. The cross-sectional area of the cable (connector> should be compatible with the rated value of the capacitor, but shall not be less than 0.5 μm. Their insulation performance should also meet the rated voltage and temperature requirements of the capacitor. The threaded terminal seat shall comply with GB 7000.1-1996 No. 14. The threadless terminal shall comply with GB 7000.1 1996 Chapter 15. 6.2 When the outer shell of the capacitor is metal, it shall be equipped with an earthing terminal or earthed (or connected to other metal parts of the luminaire) by means of a clamp or fixing clip. The part of the housing to which the clamp or clip is attached shall not be painted or otherwise coated with non-conductive coatings to ensure good electrical contact. Compliance is checked by visual inspection and by the following test: A current of at least 10 A is applied successively between the earthing terminal or earthing contact and each accessible metal part. The unloaded voltage of the power supply used shall not exceed 12 V. The voltage drop between the housing and the clamp or fixture is determined and the resistance calculated from the current and voltage drop. In no case shall the resistance exceed 0.50. The last paragraph above does not apply to metal-enclosed capacitors covered with insulating material, which shall be tested in accordance with 13.2. 7 Creepage distances and electrical clearances
The creepage distances on the outer surface of the insulation of the terminal and the electrical clearances between the outer surface of the terminal connection or between these live parts and the metal casing of the conductor (if any) shall not be less than the minimum values given in Table 1. These minimum distances apply only to terminals with or without external wiring. They do not apply to internal creepage distances and electrical clearances. Compliance is checked by measurement,
Any slots built outside the dog shall be used as the creepage distance. In calculating the total air path, any air gap less than 1 mm shall be ignored. The creepage distance is the distance measured in air along the surface of the insulating material. Table 1 Minimum creepage distances and electrical clearances Source
Rated voltage, V
Creepage distance
Electrical clearance
1. Between live parts of different polarity
2. Between live parts and accessible metal parts permanently fixed on the capacitor (including screws or devices that fix the cover or fix the capacitor to the rack)
3. Between live parts with no polarity return
1. Between live parts and accessible metal parts permanently fixed on the capacitor (including screws or devices that fix the cover or fix the capacitor to the rack?
5. Live parts and semi-torsion support surface or polar movable metal parts (if any, if under very unfavorable conditions, the value of the above item is adopted and the structure cannot guarantee the equivalent of
* Glass or other insulating materials with equivalent leakage characteristics. 24
24~250
2-250~500
500--1 000
Note: The values in brackets are suitable for creepage distance and electrical clearance without pollution transfer. For permanently sealed or compound-filled enclosures, creepage distance and electrical clearance are not checked:
8 Rated voltage
GB18489--2001
Capacitors should be able to withstand voltage changes not exceeding 110% of the rated value for a long time within the rated temperature range. Compliance is checked by the tests specified in Chapter 13. Note: This requirement is for voltage changes caused by passive power supply. 9 Fuse
When the capacitor is equipped with an internal fuse, it should be fully protected, enclosed and insulated to prevent tripping or contact with the metal enclosure when the fuse is activated during normal use. The inspection method is visual observation and 13.2 and the tests specified in clause 15. NOTE: Any internal fuse shall be designed with consideration for possible short circuits external to the capacitor. 10 Discharge resistor
A capacitor may have a discharge resistor permanently connected across its terminals. If this resistor is fitted, the capacitor shall be discharged to reduce the AC voltage applied to it from the peak value to below 50 V within 1 min. The value shall also allow for voltages exceeding the rated value by 10%.
The manufacturer shall state the value of this resistor and its tolerance. Compliance shall be checked by measurement.
In the main circuit of the luminaire, a discharge path must be provided for all capacitors. This standard recommends the use of capacitor internal resistors. However, other solutions may be used.
2 In some cases, such as plug-connected luminaires, it may not be allowed to discharge the voltage to 50 V within 1 min. See 8.2.7 of GE 7000.11996.
11 Test procedure
Divide a total of 51 (6 for Class B) self-healing capacitors or 20 non-self-healing capacitors into two groups according to the following requirements. Note: For capacitors with reactive power exceeding 1kvat, the number of test samples shall be determined by the manufacturer and the testing agency. All capacitors shall be tested in the following order: a) If necessary, perform sealing and heating tests in accordance with the provisions of Chapter 12; b) Perform high voltage tests between the terminals in accordance with the requirements of 13.1; c) Perform high voltage tests between the terminals and the external charge in accordance with the requirements of 13.2. The first group consists of 10 capacitors, which are tested in sequence according to Chapter 14. This test is to check whether the performance of the capacitor meets the design requirements under abnormal working conditions. Then perform heat resistance, fire resistance and electric tracking resistance tests in accordance with Chapter 15. The first group consists of 41 (51 for Class B) self-healing capacitors for the tests in Chapters 16 and 17. 10 of them are only used for the healing test and no further tests are performed. The rest are used for destructive tests. 12 Sealing and heating tests
12.1 Sealing and heating tests for Class A capacitors Capacitors whose fillers become liquid at (t. + 10)°C should be fully sealed and have sufficient heat resistance. The following test is used to check their compliance.
Place the charged capacitor in an oven at a position that is most likely to cause leakage of the impregnant or filler, and heat it to a temperature higher than the rated maximum temperature (t>10°C, H) and keep it at this humidity for 1 hour. During this test, no leakage of the impregnant or filler shall occur. The capacitor shall not become an open circuit. 677
CB 18489--2001
Note: This test is not applicable to capacitors where the manufacturer indicates that the capacitor does not contain a filler that becomes liquid at (t.—10)°C. 12.2 Sealing and heating test for Class B capacitors The sealing of capacitors is a safety requirement for overpressure protection devices. This test is a random test or a type test. Capacitors with fillers that can become dripping when the temperature exceeds the limit and capacitors without fillers are subjected to the following test: After the capacitor is degreased, it is placed in a sealed container filled with liquid, with the surface exceeding the sample by at least 10 mm. The liquid can be water without gas at 20°C. The liquid is placed at room temperature, the container is closed and the air is evacuated, and the air pressure reaches 16 000 within 1 minute. Pa, and keep this state for at least 1 minute. Observe the test sample through the window of the container: the leakage point of the capacitor shell is shown by rising bubbles.
Note that some capacitors are designed with gaps outside the capacitor seal. The rising bubbles that come out of the external gap at the beginning of the test should not be counted. If necessary, extend the test time of the capacitor. 13 High voltage test
The capacitor should be able to withstand the high voltage test.
Through 13.1 and 13.2 Test to check its qualification. 13.1 High voltage test between terminals Non-self-healing capacitors shall be able to withstand an AC test voltage of 2.15U for 60s applied between the terminals at room temperature.
Self-healing capacitors shall be able to withstand an AC test voltage of 2U for 60s applied between the terminals at room temperature. Self-healing capacitors are allowed to have a breakdown during the test. The initially applied voltage shall not exceed half of the test voltage, and then the voltage is gradually increased to the specified value. 13.2 High voltage test between the terminals and the casing Each capacitor can withstand an AC test voltage of 50Iz or 60IIz for 1n1in, with the following values: Capacitor rated voltage
Test voltage
2 000 V (effective value)
2500V (effective value)
The voltage applied initially shall not exceed half of the test voltage, and then the voltage shall be gradually increased to the specified value. For capacitors made of insulating materials, the test voltage shall be applied between the terminal and the metal foil in close contact with the surface of the shell, and the gap between the metal box and the terminal shall not be less than 4mm. 14 Performance of withstanding abnormal working conditions
The capacitor shall have sufficient performance to withstand abnormal working conditions. Its qualification shall be checked by 14.1 and 14.2. The capacitor is required to undergo a humidity test under applied voltage, followed by a current (discharge) test. This test is to prove the reliability of the capacitor under humid conditions and under severe voltage conditions caused by current surges caused by non-sinusoidal waves. If the capacitor is designed with a fuse inside, the fuse may short-circuit when doing the tests of 14.1 and 14.2. The manufacturer shall clearly indicate that spare parts are provided for this purpose. The capacitor with a fuse design directly connected to the capacitor winding does not need to be changed or altered because of this test.
10 capacitors are connected to the test in accordance with 14.1, and then tested in accordance with 14.2. 14.1 Humidity test with applied voltage
Measure the capacitance and the tangent of the dissipation angle at a frequency of 1kHz for 10 capacitors. In this test, the length of the wire or terminal should not exceed 30mm. The temperature of the test chamber used in this test should be maintained at 40℃2℃, and the relative humidity in the area where the capacitor is placed should be between 90% and 95%. The air in the chamber should be circulated, and the design of the chamber should prevent beads or water drops from falling on the capacitor. G78
GB 18489 2001
The test samples are placed in the humidity chamber and connected to the AC power supply. After the humid conditions are reached, a voltage of is applied to all samples. The voltage and humidity should be maintained for 240h.
After the test, take the capacitor and place it at room temperature for 1-2 hours. Then check whether it meets the following conditions: the capacitance change should be less than 1%;
The loss tangent value change measured at 1kIIz frequency should be less than 50%; no defective products are allowed.
14.2 Current (discharge) test
After 10 identical capacitors complete the test of 14.1, perform a discharge test separately at room temperature. The test lasts 15 minutes, and each capacitor selects a different discharge circuit according to the following conditions. -Peak current
10 μF
>10 μF, ≤25 μF
25 μF
—30 A/μF(30 V/μs)±10%
—25 A/μF(25 V/μs)—10%
-..20 A/μF(20 V/μs)=10%
-The effective value of the current should be 1.5A/μF or 16A, whichever is smaller;--Peak-to-peak voltage 600V+10%.
Note: Typical circuit is under consideration.
14.1 After the test, the sample is tested with the final measuring meter, which is also used as a predictor of the test in 14.2. The samples shall meet the following requirements:
The capacitance change shall be less than 1%;
The loss tangent change measured at a frequency of 1 kIIz shall be less than 50%;
No defective products are allowed.
In addition, all capacitors shall pass the isolation voltage test between the terminal and the housing required by 13.2. 15 Heat resistance, fire resistance and electric tracking resistance
15.1 External insulating material parts used for fixed terminals shall have sufficient heat resistance. For parts made of materials other than ceramics, the ball pressure test shall be carried out in accordance with the provisions of Chapter 13 of GB7000.1-1996.
15.? External insulating material parts used for fixed terminals and other insulating material parts used to provide protection against electric shock shall have flame and inflammability resistance.
For parts made of materials other than ceramics, the test method for their qualification shall be in accordance with the provisions of 15.2.1 or 15.2.2 and the test shall be carried out.
15.2.1 External insulating material parts used to provide protection against electric shock should comply with GB/T5169.12 Carry out the glow-wire test under the following test conditions:
·Number of samples:
The sample shall be a complete component;
The tip temperature of the glow-wire shall be 650℃;
Any burning part of the sample shall be extinguished within 30 seconds after the glow-wire is removed: and the falling flame shall not burn the five layers of thin paper specified in 6.81 of GB/T4687-1981 half-laid 200mm±5mm below the sample. The manufacturer shall specify whether the test is carried out on a complete capacitor or on the various parts of the casing specially provided by the manufacturer for this test.
15.2.2 The external insulating material parts used for fixed terminals shall be subjected to the needle flame test in accordance with GB/5169.5. The test conditions are as follows: .--Number of samples:
A sample shall be a complete component.
A sample shall be a complete component. If it is necessary to remove some parts of the capacitor during the test, care must be taken to ensure that the test conditions are not significantly different from normal use conditions. The test flame should be applied to the center of the surface to be tested; the flame application time is 10s; After the test flame is removed, any persistent flame must be extinguished within 30s, and the falling flame must not burn the five layers of thin paper specified in 6.81 of GB/T4687-1984 laid flat 200mm ± 5mitm below the sample. 15.3 Tracking resistance test For capacitors used in non-ordinary lamps, the external insulating parts used to fix live parts or contact live parts should be made of tracking resistant materials. Note: Capacitors that do not meet the requirements of this item during the test are only allowed to be used in ordinary lamps. The method for testing its quality is to carry out the tracking resistance test specified in the relevant part of GB7000.1-1996, Part 13. 16 Self-healing test
Capacitors with the mark "(see 5:1i)) shall be tested for their self-healing performance by the following test.
Pretreatment
The manufacturer shall specify whether the capacitor has been pretreated according to the durability test in 17.1.1. The capacitor shall be placed under an AC voltage of 1.25U. and the voltage shall be increased at a rate not exceeding 200V per minute until five white healing breakdowns occur from the start of the test or the voltage has reached 3.5. (The manufacturer may specify a higher rate) The capacitors are then tested for 10 seconds. The test results are as follows: The test results are as follows: The test results are as follows: The test results are as follows: The test results are as follows: The test results are as follows: The test results are as follows: The test results are as follows: The test results are as follows: The test results are as follows: The test results are as follows: The test results are as follows: The test results are as follows: The test results are as follows: The test results are as follows: The test results are as follows: The test results are as follows: The test results are as follows: The test results are as follows: The test results are as follows: The test results are as follows: The test results are as follows: The test results are as follows: Voltage, and retest the same batch of capacitors once. The self-healing breakdown that occurs during the retest should be added to the previous total. Each capacitor can only be counted for a maximum of five times. If the total number of self-healing breakdowns does not reach 25 times, the type is judged as unqualified. If the capacitance change before and after the test is not greater than 0.5, the capacitor is considered to have passed the test. For capacitors that have passed the self-healing test, no other tests are performed. Note: Self-healing breakdowns that occur during the test can be detected by an oscilloscope, or by acoustic or high-frequency detection (Figure 3). 17 Destructive test||t t||The capacitor should have sufficient resistance to damage. Self-healing capacitors can be tested according to the test procedures in 17.1 or 17.2. The test procedure is shown in Figure 4. For parallel lighting capacitors, the manufacturer shall indicate which test method is used, test A or test 13. Non-white-healing capacitors shall be tested according to 17.3. 17.1 Test A
This test procedure applies to parallel lighting capacitors. Such capacitors should be capacitors that do not rely on pressure-breaking devices for operation, such as Class A capacitors,
17. 1.1 Durability test
21 samples are tested in accordance with the requirements of Chapter 8 of G13/T18504·2001, and the voltage and time are selected from Table 2. Table 2
Voltage (x
Time, h
Test temperature = t
GB18489---2001
Note: This durability test can be completed by the manufacturer under the supervision of the inspection agency. Check its compliance in accordance with the requirements of 8.6 of GB/T18501-2001. 17.1.2 The 20 samples that have completed the test of 17.1.1 and are tightly wrapped with the thin paper specified in 6.81 of GB/T46871984 are required to undergo the following additional test.
The voltage and time should be selected by the manufacturer from Table 3. The test bed is determined by the inspection agency and the manufacturer. Table 3
Voltage (xu.)
Test temperature = t
In case the total current of all 20 capacitors has not decreased to 50% of the initial value, the manufacturer may specify a longer test time to continue to test the capacitance. The test time should not exceed 2500h. If the current reduction is not obtained at the end of the specified time, it should be checked how many capacitors have become open circuit (failed). The remaining capacitors are tested one by one in the following order: only at room temperature, the next one at (t.-10) temperature, and so on. The test is continued until 10 failed capacitors are obtained. Check their compliance according to the requirements of 17.1.4. It is allowed that there are only 10 unqualified items in items 1), 2), 3), and 4. It is not allowed that there are unqualified items in item c). 17.1.2.1 Preparation for the test
Wrap the capacitor terminals tightly with the thin paper specified in 6.81 of G13/T4687-1984 and place them in an oven or a test box at room temperature. The capacitors are connected one by one and continuously in a convex current test circuit shown in Figure 2. The DC power supply can provide a current of 50mA and a DC current of 10U.
A high-power AC power supply and a time-limited fuse mentioned in 17.2.2 should also be equipped and connected as shown in Figure 1. The test procedure is as follows:
a) According to the circuit shown in Figure 2, set the switch position to 1", adjust the DC power supply so that the voltage reading is 10U. b) According to the circuit shown in Figure 2, set the switch position to "2", adjust the variable resistor R, and make the ammeter read 50mA; e) According to the circuit shown in Figure 2, set the switch position to "3", and the reading will soon be in a stable position, and then reduce the current of the DC power supply to zero:
d) When the capacitors are at the same temperature, apply an AC voltage of 1.3 to the capacitors as quickly as possible for 5 minutes. The circuit used is shown in Figure 1. If the fuse is blown, it indicates a short circuit. If the current value is less than 10% of the expected reading of the ammeter, it indicates an open circuit. 17.1.2.2 Conditions for identifying failed capacitors During the test of 17.1.2.1), check whether the capacitor meets the following requirements. If the requirements are met, cool the capacitor to room temperature and test it again to see whether the requirements of 17.1.2.3 are met. If the following requirements are not met, repeat all the procedures of 17.1.2.1. If the current through any capacitor is less than 10% of the value expected based on its rated capacitance and the applied test voltage, it must be due to one of the following reasons:
a) The capacitor is short-circuited and the fuse is burned; Www.bzxZ.net
b) The capacitor is open-circuited or has lost most of its capacitance; r) The capacitor is not short-circuited but the fuse has burned due to changes in the electrical properties of the capacitor. After replacing two fuses (each of which must operate), it can be determined whether the capacitor is in a stable state and has reached the state described in a) or) above. If the current shown on the ammeter in Figure 1 is very low or even absent, it means that the capacitor has a fault 1). Then take the failed capacitor out of the oven and cool it to room temperature, and test whether it meets the requirements of 17.1.4. 17.1.2.3 Determination of failed capacitors GB 18489-2001
All failed capacitors shall meet the requirements of 17.1.4. 17.1.3 High current (effective value) test
Class A capacitors shall meet the following test requirements. Use 10 samples for the test.
Test the capacitor element (completed winding) at room temperature: The sample prepared by the manufacturer is fixed on a wire with a certain cross-sectional area that can withstand a large current (effective value). Before the high current (effective value) test, the prepared sample shall first be tested in Chapter 16, and then the sample shall be tightly wrapped with the thin paper specified in 6.81 of G13/4687-1984. The samples were tested under the following conditions:
f-current fluctuation frequency = 10kIHz±10%
I,=peak current = 15 A/μF+10%
1=effective current -3A/μF±10%
I≤48 A.
Test duration = 15 [mi1
The cycle repetition frequency F川 is calculated from the following equation: 12
The test sample shall meet the requirements of 17.1. 4 c). Note: The test circuit is under consideration.
17. 1. 4 Qualification conditions
Each capacitor shall meet the following requirements:
a) The leaking liquid material may wet the surface of the capacitor shell, but shall not drop; b) The test finger (see Figure 1 of GB4208-1993) shall not touch the internal live parts; c) The thin paper shall not be burned or charred, as this will indicate that flames or sparks are ejected from the opening; d) The capacitor shall withstand the test of 13.2, but the test voltage is reduced by 500V. 17.2 Test 1
This test is applicable to self-healing capacitors and white-healing shunt capacitors used in the mid-link lighting circuit with a circuit breaker, such as Class B capacitors. The reliability of the circuit breaker function is proved by the meter. The change of the state of the capacitor in the destruction test is used to verify that when the capacitor fails, no harmful consequences will occur, such as fire of adjacent parts or damage to the machine. The design of Class B capacitors should take into account that short circuits or line interruptions will occur after the capacitor is damaged. This test should be carried out on capacitors that have passed the initial tests in Section 11 a) to c). In addition, the capacitance should be measured before the test (see Section 6 of GB/T 18504-2001).
17.2.1 Test samples
The following test should be carried out on 20 capacitors that have completed the endurance test of GB/T18504 and are still valid, and 20 new samples that have not been pre-treated.
17.2.2 Test arrangement
The capacitor should still be wrapped tightly with thin paper and placed in an oven. Each capacitor is connected in series with a time-lag fuse with electrical characteristics as mentioned in GB13539. The fuse specification should be 20A or 10 times the rated current of the capacitor, whichever is greater. The high-power AC power supply connected to the capacitor can flow a fault current of 300A or 10 times the rated current of the highest-rated fuse in the test circuit.
The outer cover of the electrical appliance should be connected to one pole of the power supply through a metal shell. 632
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