1 General provisions
1.1 Scope
This standard is applicable to complete filter units for radio interference suppression as included in GB/T 15287.
1.2 Purpose
The purpose of this standard is to specify the standard requirements for protection against electric shock hazards of filter for radio interference suppression, specify the standard rated value and characteristics, select applicable test methods from GB/T 15287, and give the general performance requirements of filter for radio interference suppression. The test severity and performance requirements specified in the detail specification shall be equal to or higher than the performance level of this sectional specification, for lower performance levels are not permitted. In addition, ensure that the minimum requirements for protection against electric shock hazards specified therein must be applied.
1.3 Related documents
GB 321 (ISO 3) Preferred numbers - Series of preferred numbers
GB 2471 (IEC 63) Resistors for electronic equipments - Nominal resistance value series and nominal capacity series of fixed capacitance and their allowable deviation
GB 2691 (IEC 62) Resistors and capacitors - Marking: contents and methods
GB 2693 (IEC 384-1) Fixed capacitors for use in electronic equipment - Part 1: Generic specification (Available for certification)
GB/T 15287 (IEC 939-1) Complete filter units for radio interference suppression - Part 1: Generic specification
IEC 60-1 High-voltage test techniques - Part 1: General definitions and test requirements
IEC 68 Basic environmental testing procedures
IEC 85 Thermal evaluation and classification of electrical insulation
IEC 279 Measurement of the winding resistance of an a.c. machine during operation at alternating voltage
IEC 384-14 (1981) Fixed capacitors for use in electronic equipment - Part 14: Sectional specification - Fixed capacitors for electromagnetic interference suppression and connection to the supply mains
IEC 938-2 Fixed inductors for radio interference suppression - Part 2: Sectional specification - Selection of methods of test and general requirements
1.4 Information to be given in a detail specification
Detail specifications shall be derived from the relevant blank detail specification.
Detail specifications shall not specify requirements inferior to those specified in the generic or sectional specification. When more severe requirements are included, they shall be listed in 1.8 of the detail specification and indicated in the schedule, for example by an asterisk.
Note: The information given in 1.4.1 may, for convenience, be presented in tabular form.
The following information shall be given in each detail specification and the values quoted shall be preferentially selected from those given in the relevant clause of this sectional specification.
1.4.1 Outline drawing and dimension
An outline drawing of the filter shall be provided as an auxiliary means for easy identification and comparison with other filters. The dimensions affecting interchangeability and installation as well as their permissible deviations shall be given in the drawing. All dimensions shall be given in millimeters (mm) preferentially, 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 filter, the diameter and length of the main body and the diameter of the termination of the filter shall be given. If necessary, for example, when the number of items (filter parameter value / voltage range) included in the detailed specification is more than one, its size and its permissible deviation shall be listed in a table following the figure.
When the outline structure is different from the above, the detailed specification shall give sufficient dimensional data to describe the filter.
1.4.2 Installation
The filter shall be installed by the normal installation method. When the filter is an axial termination, the distance between the filter body and the installation point of the termination shall be (6±1)mm. The design of a certain filter may require special installation fixtures during application, in which case, the detailed specification shall give the figure of such installation fixtures, and such installation fixtures shall be used in vibration, bump and impact tests.
1 General provisions
2 Preferred rated values and characteristics
3 Quality assessment procedures
4 Test and measurement procedures
Annex A Circuit example of AC filter voltage durability test (Supplement)
Annex B Circuit examples suitable for charge and discharge tests (Supplement)
Annex C Circuit examples suitable for impulse tests (Supplement)
Annex D Record of lot release certificates and quality conformance inspection (Reference)
Additional explanation:
