GB/T 15288-1994 Radio frequency interference suppression integrated filters Part 2: Selection of test methods and general requirements for sub-specifications
Some standard content:
National Standard of the People's Republic of China
Complete filter units for radio interference suppressfonPart 2 : Sectional specificationSelectlon of methods of test and general requirementsGB/T15288-94
This standard is equivalent to the international standard IEC939-2 (1988) "Complete filter units for radio interference suppressfon, Part 2: Selection of test methods and general requirements", with the addition of Appendix D.
1 General
1.1 Scope
This standard applies to complete filter units for radio interference suppressfon included in GB/T15287. 1.2 Purpose
The purpose of this standard is to specify the standard requirements for protection against electric shock hazards of filters for radio interference suppressfon, to specify standard ratings and characteristics, to select applicable test methods from GB/T 15287 and to give general performance requirements for filters for radio interference suppressfon. The test severity and performance requirements specified in the detailed specification should have almost the same or higher performance level as this sub-specification. Because it is not allowed to reduce the performance level. In addition, the minimum requirements for protection against electric shock hazards specified therein must be adopted. 1.3 Related documents
GB321 (ISO3) Priority numbers and priority number systems GB2471 (IEC63) Nominal resistance series of resistors and nominal capacity series of fixed capacitors for electronic equipment and their allowable deviation series
GB2691 (IEC62) Resistors and capacitors marking content and marking method GB2693 (IEC384-1) Fixed capacitors for electronic equipment Part 1: General specification (for certification) GB/T15287 (IEC939-1) Integral filters for suppressing radio frequency interference Part -~: General specification IEC 60-1 High voltage test technology Part 1: General definitions and test requirements IEC68 Basic environmental test procedures
IEC85 Thermal calculation and classification of electrical insulation
IEC279 Measurement of line resistance of AC motors during AC voltage operation EC384-14 (1981) Fixed capacitors for electrical equipment Part 14: Selection of test methods and general requirements for fixed capacitors for radio frequency interference suppression
IEC938-2 Fixed inductors for radio frequency interference suppression Part 1: Sectional specification: Selection of test methods and general requirements 1.4 Contents to be given in the detailed specification
The detailed specification shall be prepared in accordance with the relevant blank detailed specification. The detailed specification shall not specify requirements that are lower than those specified in the general specification or section specification. When more stringent requirements are included, they shall be listed in the detailed specification 1.8 and indicated in the list, for example: indicated by an asterisk. Approved by the State Technical Supervision Commission on December 6, 1994 and implemented on July 1, 1995
GB/T15288-94
Note: For the sake of simplicity, the contents specified in Article 1.4.1 may be presented in a table. The following contents shall be given in each detailed specification, and the quoted values shall be selected from the values given in the corresponding clauses of this sub-specification in priority.
1.4.1 Appearance drawing and dimensions
There shall be an appearance drawing of the filter as an aid to easy identification and comparison with other filters. The dimensions affecting the compatibility and installation and their allowable deviations shall be given in the drawing. All dimensions shall preferably be marked in millimeters (mm). However, when the original dimensions are given in inches, they shall be converted to dimensions in millimeters. Generally, the length, width and height of the filter body shall be given. For cylindrical filters, the diameter and length of the filter body shall be given, and the diameter of the filter lead shall be given. When necessary, for example, when the number of items (filter parameter value/voltage range) included in the detailed specification is more than one, the dimensions and their allowable deviations shall be listed in a table below the figure. When the appearance structure is different from the above, the detailed specification shall give dimensional data sufficient to describe the filter. 1.4.2 Installation
The filter shall be installed in the normal installation method. When the filter is axially output, the distance between the filter body and the output terminal mounting point shall be 6±1mn1. The design of a certain filter may require special mounting fixtures in its use. In this case, the detailed specification shall give the drawings of such mounting fixtures, and such mounting fixtures shall be used in vibration, collision and impact tests. 1.4.3 Ratings and characteristics
The ratings and characteristics shall be in accordance with the provisions of the relevant clauses of this specification. 1-4.3.1 Special characteristics
When it is considered necessary to appropriately specify special characteristics for the filter for design and application, they can be listed as additional characteristics. 1.4.4 Marking
If there is any difference with Article 1.6 of this sub-specification, it shall be specially stated. 1.5 Terminology
See Article 2.2 of GB/T15287.
1.6 Marking
1.6.1 The content specified in the marking is usually selected from the following items. The relative importance of each item is indicated by its position in the order of items.
Manufacturer's name (or trademark);
Manufacturer's model name;
Rated voltage:
Rated current;
Rated temperature:
Climate category:
Manufacture year and month (or week) (can also be in code form); circuit diagram showing the internal wiring of all components, as well as capacitance, capacitor type and inductance; h
Detailed specifications based on.
The filter shall clearly mark the above items a and b and mark the remaining items that are considered necessary as much as possible. 1.6.2 Marking of filter seven
Any repeated content should be avoided.
1.6.3 All the items listed in 1.6.1 should be clearly marked on the packaging container of the filter. 1.6.4 Any additional marking that does not cause mixed slip should be allowed. 2 Preferred ratings and characteristics
2.1 Preferred characteristics
The values given in the detailed specification should be selected from the following values in priority: 2.1.1 Preferred climate category
GB/T15288-94
The particle interference suppression filters included in this specification are divided into climate categories according to the provisions of the general rules of IEC68-1. The lower and upper category temperatures and the duration of the steady-state damp heat test shall be within the following ranges: lower category temperature: 55°C, -40°C, 25°C and -10°C, upper category temperature: 70°C, 85°C, 100°C and 125°C, the rated temperature shall not be less than 40°C;
The duration of the steady-state damp heat test: 10d, 21d and 56d The severity of the cold and dry heat tests is the lower and upper category temperature respectively. 2.2 Preferred Rated Values
2.2.1 Nominal Capacitance and Its Permissible Deviation
The preferred value of the nominal capacitance is selected from the E6 series preferred values given in GB2471. Except for the X-type ceramic capacitors which can have a maximum permissible deviation of 2%, the maximum permissible deviation of other capacitances is ±20%. Note: When the mode of electric shock hazard of the equipment is considered to be caused by leakage current, the capacitance and permissible deviation, especially when using Class 2 ceramic capacitors, should be paid attention to the temperature characteristics and voltage characteristics of the capacitance. 2.2.2 Nominal inductance and its allowable deviation The nominal inductance can be expressed as a minimum value or as a value with an allowable deviation. The preferred value of the nominal inductance should be selected from the preferred values of the E12 series given in GB2471. Its preferred allowable deviation is ±25%, =8%, ±%.
2.2.3 Nominal resistance value and its allowable deviation
The preferred value of the nominal resistance value is selected from the preferred values of the E6 and E12 series given in GB2471. The allowable deviation should be given in the detailed specification.
2.2.4 Insertion loss
For filters designed for a specific device, the manufacturer should not be required to specify the insertion loss of the filter. Because the characteristics of the filter are measured by its suppression effect on the device. However, in other cases, when the manufacturer specifies the insertion loss of the filter, the minimum insertion loss, impedance and measurement method under the specified frequency should also be specified. 2.2.5 Rated voltage (UR)
The preferred values of the rated voltage are:
AC filter: 50, 125, 250, 380, 440, 480 V, DC filter: 50, 160, 250 and 500 V. Note: The rated voltage passband of the radio interference suppression filter is selected to be equal to or greater than the nominal voltage of the power system to which it is connected. However, it should be taken into account that the system voltage may exceed the nominal voltage by more than 10%. 2. 2.6 Category voltage (Uc)
Unless otherwise specified in the detailed specification, the category voltage is equal to the rated voltage. 2.2.7 Rated temperature
The rated temperature should not be less than 40℃.
2.2.8 Rated current
The preferred value of the rated current should be selected from the GB321R10 series. 3 Quantity assessment procedure
3.1 Initial manufacturing stage
The initial manufacturing stage of the interference suppression filter is the combination of components. The filter consists of inductor, capacitor and resistor components. The manufacturer may not subcontract the initial manufacturing stage or any subsequent stage of production. 3.2 Filters with similar structures
GB/T 15288—94
When the range of component values has the following common characteristics, it can be considered as a filter with similar structure: the manufacturing process of capacitors is the same;
the manufacturing process of inductors is the same,
the manufacturing process of resistors is the same
the design features and manufacturing process are similar;
the rated voltage is the same;
the f and current ranges are the same.
3.3 Release batch certification record
(to be supplemented after adding quality consistency test). 3.4 Approval
The approval test procedure for filters with similar structures is given in Article 3.1 of GB/T15287 General Specification. 3.4.1 Approval procedure based on fixed sample size 3.4.1.1 Sample drawing
This standard only includes the approval test procedure. Two optional test procedures are given, namely, all test procedures including electric shock hazard protection and characteristic requirements and limited test procedures including electric shock hazard protection. There are two test lists, one set for filters made of qualified components and the other set for other filters. If the filter is made of components qualified by GB/T15287 and (or IEC938-2), it can be tested according to the shorter test list in Table 1A. If these components are not qualified, the complete test list in Table 1B should be used. When only the electric shock hazard protection test is required, the test list in Table 1C or Table 1D of the cabinet should be used. Each rated voltage should be identified separately. The total number of filters of each rated voltage in each group of tests is given in Table 1A, 1B, 1C or 1D. For each rated voltage, the sample should include the identified The maximum and minimum rated current, maximum and minimum nominal capacitance and nominal inductance of the specified range are not equal. Spare samples are allowed as follows:
One of each filter can be used to replace the unqualified samples allowed in the "U" group. a.
b. One of each filter can be used to replace the unqualified samples due to reasons other than manufacturing or the test sequence. e
If it is necessary to repeat any test, the test should be carried out in accordance with Note 1) of 1A, 1B, 1C or 1D, and the remaining spare samples can be used.
The spare samples can be kept at the manufacturer instead of sending them to the test station. The number of samples specified in the group is for all test groups. If this is not the case, the number of samples can be reduced accordingly. 3.4.1.2 Tests
For the approval of a series of filters of similar structure of one rated voltage, all the tests specified in Table 1A1B, 1C or 1D shall be completed. Each group of tests shall be carried out in the order given. All samples shall be subjected to Group 0 test and then divided into other groups. Unqualified samples found during Group 0 test shall not be used in other groups. When a filter does not meet all or part of the requirements of a test, it is counted as a "non-conforming product". When the number of non-conforming products does not exceed the allowable non-conforming products specified in 1A, 1B, 1C or 1D, identification approval shall be given. Note: Table 1A, 1B, 1C or 1D and Table 2 together form a fixed sample size test list. Table 1A, 1B, 1C or 1D includes sampling details and the allowable number of non-conforming products for different tests or test groups. Table 2, together with the test details included in Chapter 4, gives a complete summary of test conditions and performance requirements, and indicates, for example, the test method or test conditions that must be selected in the detailed specification. The test conditions and performance requirements of the fixed sample size test list should be consistent with those specified in the detailed specification. Test group
GB/T 15288-94
Table 1A Sampling plan for electric shock hazard protection and performance tests of filters composed of qualified components
Appearance inspection
Continuity
Withstand voltage
Insulation resistance
Backup sample
Terminal strength
Resistance to welding heat
Weldability
Rapid temperature change
Collision or shock
Gas reading sequence
Steady-state damp heat
Temperature rise\,5
Insertion loss"
Clause number
4.11 or 4. 12
Number of tested samples for each rated voltage and each
weight group
32/23/14/7
14/10/6/4
6/4/2/1
12/8/6/3
18/12/8/4
Number of unqualified products allowed for each rated voltage and weight group
Power supply0
Others1/1/0/0
1 /1/0/0
1/1/0/0
10/8/4/2 Power Supply 0
10/8/4/2
4/3/2/1
1/1/0/0
1/1/0/0
1/1/0/0
2/1/1/1bzxz.net
Note: 1) If there is one nonconforming item, all tests of the group shall be repeated with a new sample and no further nonconforming items shall be allowed. Nonconforming items occurring in the first sample shall be counted in the total permissible nonconforming items in column 6. Only one group shall be repeated for testing. For non-power supply filters, the repeated test is not applicable and the permissible number of nonconforming items in a single sample shall be as specified. 2) If applicable.
3) If specified in the detail specification.
4) Any one of the requirements in the detail specification. 5) The relationship between the number of samples and the weight range is as follows: m15g
15 g
b. One of each filter may be used to replace a sample that fails due to reasons other than manufacturing or the order of testing. e
If any test needs to be repeated, the test shall be carried out in accordance with Note 1) of 1A, 1B, 1C or 1D, and the remaining spare samples may be used.
The spare samples may be kept at the manufacturing site instead of sending them to the test station. The number of samples specified in the group is for all test groups. If this is not the case, the number of samples may be reduced accordingly. 3.4.1.2 Tests
For the approval of a series of filters of similar structure at a rated voltage, all the tests specified in Table 1A1B, 1C or 1D shall be completed. Each group of tests shall be carried out in the order given. All samples shall be subjected to group 0 tests and then distributed to other groups. Failed samples found during group 0 tests shall not be used for other groups. When a filter does not meet all or part of the requirements of a test, it is counted as a "nonconforming product". When the number of nonconforming products does not exceed the allowable nonconforming products specified in 1A, 1B, 1C or 1D, identification approval should be given. Note: Table 1A, 1B, 1C or 1D and Table 2 together form a fixed sample size test: - list. Table 1A, 1B, 1C or 1D includes sampling details and the allowable number of nonconforming products for different tests or test groups. Table 2, together with the test details included in Chapter 4, gives a complete summary of test conditions and performance requirements, and indicates, for example, the test method or test conditions that must be selected in the detailed specification. The test conditions and performance requirements of the fixed sample size test list should be consistent with those specified in the detailed specification. Test group
GB/T 15288-94
Table 1A Sampling plan for electric shock hazard protection and performance tests of filters composed of qualified components
Appearance inspection
Continuity
Withstand voltage
Insulation resistance
Backup sample
Terminal strength
Resistance to welding heat
Weldability
Rapid temperature change
Collision or shock
Gas reading sequence
Steady-state damp heat
Temperature rise\,5
Insertion loss"
Clause number
4.11 or 4. 12
Number of tested samples for each rated voltage and each
weight group
32/23/14/7
14/10/6/4
6/4/2/1
12/8/6/3
18/12/8/4
Number of unqualified products allowed for each rated voltage and weight group
Power supply0
Others1/1/0/0
1 /1/0/0
1/1/0/0
10/8/4/2 Power Supply 0
10/8/4/2
4/3/2/1
1/1/0/0
1/1/0/0
1/1/0/0
2/1/1/1
Note: 1) If there is one nonconforming item, all tests of the group shall be repeated with a new sample and no further nonconforming items shall be allowed. Nonconforming items occurring in the first sample shall be counted in the total permissible nonconforming items in column 6. Only one group shall be repeated for testing. For non-power supply filters, the repeated test is not applicable and the permissible number of nonconforming items in a single sample shall be as specified. 2) If applicable.
3) If specified in the detail specification.
4) Any one of the requirements in the detail specification. 5) The relationship between the number of samples and the weight range is as follows: m15g
15 g
b. One of each filter may be used to replace a sample that fails due to reasons other than manufacturing or the order of testing. e
If any test needs to be repeated, the test shall be carried out in accordance with Note 1) of 1A, 1B, 1C or 1D, and the remaining spare samples may be used.
The spare samples may be kept at the manufacturing site instead of sending them to the test station. The number of samples specified in the group is for all test groups. If this is not the case, the number of samples may be reduced accordingly. 3.4.1.2 Tests
For the approval of a series of filters of similar structure at a rated voltage, all the tests specified in Table 1A1B, 1C or 1D shall be completed. Each group of tests shall be carried out in the order given. All samples shall be subjected to group 0 tests and then distributed to other groups. Failed samples found during group 0 tests shall not be used for other groups. When a filter does not meet all or part of the requirements of a test, it is counted as a "nonconforming product". When the number of nonconforming products does not exceed the allowable nonconforming products specified in 1A, 1B, 1C or 1D, identification approval should be given. Note: Table 1A, 1B, 1C or 1D and Table 2 together form a fixed sample size test: - list. Table 1A, 1B, 1C or 1D includes sampling details and the allowable number of nonconforming products for different tests or test groups. Table 2, together with the test details included in Chapter 4, gives a complete summary of test conditions and performance requirements, and indicates, for example, the test method or test conditions that must be selected in the detailed specification. The test conditions and performance requirements of the fixed sample size test list should be consistent with those specified in the detailed specification. Test group
GB/T 15288-94
Table 1A Sampling plan for electric shock hazard protection and performance tests of filters composed of qualified components
Appearance inspection
Continuity
Withstand voltage
Insulation resistance
Backup sample
Terminal strength
Resistance to welding heat
Weldability
Rapid temperature change
Collision or shock
Gas reading sequence
Steady-state damp heat
Temperature rise\,5
Insertion loss"
Clause number
4.11 or 4. 12
Number of tested samples for each rated voltage and each
weight group
32/23/14/7
14/10/6/4
6/4/2/1
12/8/6/3
18/12/8/4
Number of unqualified products allowed for each rated voltage and weight group
Power supply0
Others1/1/0/0
1 /1/0/0
1/1/0/0
10/8/4/2 Power Supply 0
10/8/4/2
4/3/2/1
1/1/0/0
1/1/0/0
1/1/0/0
2/1/1/1
Note: 1) If there is one nonconforming item, all tests of the group shall be repeated with a new sample and no further nonconforming items shall be allowed. Nonconforming items occurring in the first sample shall be counted in the total permissible nonconforming items in column 6. Only one group shall be repeated for testing. For non-power supply filters, the repeated test is not applicable and the permissible number of nonconforming items in a single sample shall be as specified. 2) If applicable.
3) If specified in the detail specification.
4) Any one of the requirements in the detail specification. 5) The relationship between the number of samples and the weight range is as follows: m15g
15 g
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