Some standard content:
FL5950, Military Standard of Electronic Industry of the People's Republic of China
SJ20037—92
General Specification for Radio Frequency Fixed and Variable Inductors
Coils, fixed and variable, radiofrequency, general specificationfor
Published on February 1, 1992
China Electronics Industry Corporation
Implementation on May 1, 1992
1 Scope
1.1 Subject Content
General Specification for Radio Frequency Fixed and Variable Inductors of the People's Republic of China
Coils, fixed and variable, radiofrequency, general specificationfor
This specification specifies the general requirements for radio frequency fixed and variable inductors. 1.2 Scope of Application
: This specification applies to fixed and variable inductors used as independent inductance components in radio frequency circuits. 1.3 Classification
1.3.1 Model
SJ20037-92
The model of the inductor is represented by three letters, "LG" stands for fixed inductor, "LT" stands for variable inductor, followed by a lead form to distinguish the letter or code, for example, "A" stands for axial lead, "B" stands for radial lead. 1.3.2 Level
Inductors are divided into the following three levels:
Level 1 inductors resistant to immersion and moisture;
Level 2 inductors resistant to moisture;bzxZ.net
Level 3 inductors for sealed components.
1.3.3 Category
Inductors are divided into the following four categories according to their maximum operating temperature (temperature rise plus maximum ambient temperature): Category 0 85℃
105℃
125℃
>125℃
2 Reference documents
GB191--85
GB192--81
GB193—81
GB194~63
GB195—63
GB196--81||tt| |Packaging, storage and transportation pictorial signs
Basic tooth form of common thread
Diameter and pitch series of common thread (diameter 1~600mm) Diameter of common thread 0.25~0.9mm Basic size Common thread
Diameter 0.25~0.9mm Tolerance
Common thread
Basic size (diameter 1~600mm)
China Electronics Industry Corporation Issued on February 1, 1992 Implementation on May 1, 1992
GB197—81
GB 6109.2—85
GB 6109.3 — 85 | | tt | | GB6109.4 — 88 | | tt | 5—87
GJB360.6 — 87 | | tt | ||GJB360.20-8 7
GJB360.21—87
GJB360.23-87
GJB360.25—87
GJB360.27--87
GJB360.28--87
GJB360.2987
3 Requirements
3.1 Detailed specifications||t t||SJ20037-92
Tolerances and fits for common threads (diameter 1 to 35 mm)Polyester enameled round wire (copper, aluminum)
Acetal enameled round copper wire
Polyurethane enameled round copper wire
Polyimide enameled round copper wire
Environmental test methods for military equipment
Mold test
Counting sampling inspection procedures and tables| |tt||Test methods for electronic and electrical components
Test methods for electronic and electrical components
Test methods for electronic and electrical components
Test methods for electronic and electrical components
Test methods for electronic and electrical components
Test methods for electronic and electrical components
Test methods for electronic and electrical components
Test methods for electronic and electrical components
Test methods for electronic and electrical components
Test methods for electronic and electrical components
Test methods for electronic and electrical components
Test methods for electronic and electrical components
Test methods for electronic and electrical components
Test methods for electronic and electrical components
Test methods for electronic and electrical components
Test methods for electronic and electrical components
Test methods for electronic and electrical components
Test methods for electronic and electrical components
Test methods for electronic and electrical components
Test methods for electronic and electrical components
Method
Test methods for electronic and electrical components
Immersion test
Low pressure test
Moisture resistance test
Temperature shock test
High temperature life test
Flammability (external flame) test
Low frequency vibration test
High frequency vibration test
Weldability test
Welding heat resistance test
Terminal strength test
Impact (specified pulse) test
Solvent resistance test
Dielectric withstand voltage test
Insulation resistance test
DC resistance test
Specific product requirements shall comply with the provisions of this specification and the corresponding detailed specifications. If the requirements of this specification conflict with the detailed specifications, the detailed specifications shall prevail.
3.2 Qualification appraisal
Inductors submitted in accordance with this specification must be products that have been qualified and approved for production. 3.3 First Article
When specified in the contract or purchase order, first article inspection shall be carried out. 3.4 Materials
The materials used in inductors shall comply with the provisions of this specification. If a material is not specified, a material that enables the inductor to meet the requirements of this specification shall be used. The acceptance or approval of any material shall not be considered as a guarantee of product acceptance. 3.4.1 Substitution of Materials
If the manufacturer wishes to use a certain material to replace the specified material or component, it shall report to the user and provide the basis for the substitution. If necessary, the user may verify the feasibility of the substitution through tests, and the substitution may be implemented only after the user agrees. 3.4.2 Flammable Materials
SJ20037—92
The materials used to manufacture inductors shall be non-flammable and explosion-proof. 3.4.3 Corrosive Materials
Corrosive materials used in the manufacturing process must be removed or neutralized to ensure that no corrosion occurs due to the use of these materials. Whenever possible, corrosion-resistant materials should be used. 3.4.4 Threaded parts
The materials used for threaded parts should be corrosion-resistant, otherwise measures should be taken to prevent corrosion. 3.4.5 Screws, nuts and washers
All screws, nuts and washers used for fixing and termination should be corrosion-resistant, otherwise measures should be taken to prevent corrosion. 3.4.6 Wires
3.4.6.1 Electromagnetic wire
Electromagnetic wire should comply with the provisions of GB6109.2~6109.4 and GB6109.6. If the electromagnetic wire that must be used in the winding design is not included in the above standards, the user must agree. 3.4.7 Solder and flux
Solder should comply with the provisions of Appendix A of GJB360.18, and flux should comply with the provisions of Appendix B of GJB360.18. 3.5 Design and construction
Inductors shall conform to the specified design, construction and dimensions (see 3.1 or 6.2). 3.5.1 Threaded parts
Unless otherwise specified (see 3.1 and 6.2)All threaded parts shall conform to the provisions of GB192197. 3.5.1.1 Engagement of threaded parts
Unless otherwise specified (see 3.1 and 6.2), all threaded parts shall engage at least three full turns. 3.5.2 Terminals
Terminals shall conform to the specified shape and dimensions (see 3.1 and 6.2). 3.5.2.1 Winding ends
The connection of winding ends shall not rely solely on welding for mechanical strength. 3.5.3 Weight
The weight of the inductor shall not exceed that specified (see 3.1 and 6.2). 3.6 Temperature shock
Inductors shall conform to 4.7.2, all windings shall be electrically continuous, there shall be no dielectric breakdown and no damage to the protective coating, and the insulation resistance shall comply with the provisions of 3.9. 3.7 Dielectric Withstand Voltage
When the inductor is tested in accordance with the provisions of 4.7.3, there shall be no sparking, arcing, breakdown and other damage, and the leakage current shall not exceed 100μA.
3.8 Low Pressure (When Applicable)
When the inductor is tested in accordance with the provisions of 4.7.4, there shall be no sparking, arcing, breakdown and other damage, and the leakage current shall not exceed 100μA.
3.9 Insulation Resistance
When the inductor is tested in accordance with the provisions of 4.7.5, the insulation resistance shall not be less than 1000MQ. 3.10 Winding Electrical Continuity (When Applicable) When the inductor is tested in accordance with the provisions of 4.7.6, all windings shall remain electrically continuous. 3.11 Working torque (applicable only to variable inductors) 3—
SJ20037—92
When the inductor is tested in accordance with the provisions of 4.7.7, the required torque shall comply with the provisions of the detailed specification. 3.12 Electrical properties
The electrical properties shall comply with the provisions (see 3.1 and 4.7.8). 3.12.1 Inductance
When the inductor is tested in accordance with the provisions of 4.7.8., the inductance shall comply with the provisions (see 3.1 and 6.2). 3.12.2 Q value
When the inductor is tested in accordance with the provisions of 4.7.8.2, the Q value shall comply with the provisions (see 3.1 and 6.2). 3.12.3 Self-resonant frequency
When the inductor is tested in accordance with the provisions of 4.7.8.3, the self-resonant frequency shall not be lower than the specified minimum value (see 3.1 and 6.2). 3.12.4 Percent Coupling (When Specified)
When an inductor is tested as specified in 4.7.8.4 or 4.7.8.4.1, the percent coupling shall be as specified (see 3.1 and 6.2). 3.12.5 Change in Inductance with Incremental Current (When Specified)When an inductor is tested as specified in 4.7.8.5, the change in inductance shall not be greater than 5% of the inductance measured at zero dc current (see 3.1 and 6.2).
3.12.6 Effective Parallel Resistance (When Specified)When an inductor is tested as specified in 4.7.8.6, the effective parallel resistance shall be as specified (see 3.1). 3.12.7. DC Resistance
When an inductor is tested as specified in 4.7.8.7, the DC resistance shall be as specified (see 3.1 and 6.2). 3.13 Temperature Rise (applicable to cylindrical insulated inductors, when specified) When an inductor is tested as specified in 4.7.9 or 4.7.9.1, the temperature rise of any winding above the specified maximum ambient temperature shall not exceed the specified value (see 3.1 and 6.2), and there shall be no physical damage. 3.14 Overload
Inductors shall not show cracking, loose terminals, or other mechanical damage when tested as specified in 4.7.10. 3.15 Resistance to Welding Heat
Inductors shall not show mechanical damage or loose terminals when tested as specified in 4.7.11. 3.16 Terminal Strength
Inductors shall not show electrical discontinuity in windings, loose terminals, disconnection, or other mechanical damage when tested as specified in 4.7.12.
3.17 Life
Inductors shall not show mechanical damage when tested as specified in 4.7.13. For phenolic plastic core or iron core inductors, the change between the initial measurement of the electrical properties and the values measured after 250+h shall not exceed the specified initial limits, and the change between the measured values of the electrical properties from 250+h to 2000h shall not exceed the specified performance degradation limits (see 3.1). For ferrite core inductors, the change between the initial measurement of the electrical properties and the values measured after 2000h shall not exceed the specified performance degradation limits (see 3.1 and 6.4). 3.18 Low temperature storage
Inductors shall not have damage to the protective coating when tested as specified in 4.7.14, and the windings and lead terminals shall not be loose, nor shall there be other mechanical damage.
3.19 Vibration
Inductors shall not have electrical discontinuities (see 3.10) and shall not have physical or mechanical damage when tested as specified in 4.7.15.1 or 4.7.15.2.
3.20 Impact (specified pulse)
SJ20037—92
When the inductor is tested according to the provisions of 4.7.16, the winding shall not have electrical discontinuity (see 3.10) and shall not have physical or mechanical damage.
3.21 Immersion (applicable only to Class 1 inductors) When the inductor is tested according to the provisions of 4.717, the winding shall not have electrical discontinuity, signs of corrosion or other visible damage, there shall be no dielectric breakdown, and the insulation resistance shall not be less than 1000MQ. 3.22 Moisture resistance (applicable only to Class 1 and Class 2 inductors) When the inductor is tested according to the provisions of 4.7.18, the dielectric withstand voltage shall comply with the provisions of 3.7, the insulation resistance of Class 1 inductors shall comply with the provisions of 3.9, the insulation resistance of Class 2 inductors shall not be less than 100M0, the electrical properties shall comply with the provisions of 3.12, and there shall be no corrosion signs that affect mechanical and electrical operation. 3.23 Bacteria
All external materials shall be sterile growth nutrients or materials treated to prevent the growth of streptococci. The manufacturer shall provide an antibacterial certificate for external materials or show no streptococci growth on the surface of the materials when tested in accordance with 4.7.19. 3.24 Solderability
When the inductor is tested in accordance with 4.7.20, it shall comply with the provisions of GJB360.18 for the qualified criterion of solderability of the lead terminals. The electrical connection points shall be mechanically fixed before welding and shall maintain electrical continuity after welding. 3.25 Solvent resistance
When the inductor is tested in accordance with 4.7.21, there shall be no mechanical damage and the markings shall remain clear. 3.26 Flammability
When the inductor is tested in accordance with 4.7.22, there shall be no violent combustion that leads to violent explosive ignition and the coating shall be able to extinguish itself. If the inductor is burned by an external flame, it shall not be considered unqualified. Only when an explosion or burning material drips to produce explosive flames, or after the external flame is evacuated, the visible flame continues to burn for more than the allowed 3 minutes, it is considered unqualified.
3.27 Marking
Unless otherwise specified, the manufacturer's trademark, grade, category, inductance, and inductance deviation should be printed on the inductor. The marking content and representation method should comply with the provisions of the detailed specifications. 3.28 Processing quality
Inductors should be processed using a manufacturing process that can ensure consistent quality and should not affect their life, performance and appearance.
4 Quality assurance regulations
4.1 Inspection responsibilities
Unless otherwise specified in the contract or order, the manufacturer shall be responsible for completing all inspection contents specified in this specification. If necessary, the ordering party or the superior appraisal agency has the right to inspect any item in the specification. 4.2 Inspection classification
The inspections specified in this specification are divided into:
a. Identification inspection (see 4.4);
b. First piece inspection (when specified) (see 4.5);c. Quality consistency inspection (see 4.6).
4.3 Inspection conditions
Unless otherwise specified in this specification, all inspections shall be carried out under the test conditions specified in the general requirements of GJB360.15
4.3.1 Test voltage
SJ20037-92
The harmonic distortion of the test voltage shall not exceed 5%. 4.3.2 Test frequency
When the test frequency does not specify a deviation, the deviation of all frequencies shall be ±0.1% of the specified value. 4.3.3 Demagnetization
Demagnetization is allowed when it is necessary to overcome the influence of residual magnetism. 4.4 Qualification Test
Qualification test shall be conducted in a laboratory approved by the superior qualification organization, and the samples shall be made by the equipment and process used in normal production. The qualification test shall be in accordance with the provisions of Table 1 and Appendix A. 4.4.1 Sample size
The sample size of inductors submitted for qualification test shall comply with the provisions of Table 1 and Appendix A of this specification. 4.4.2 Test procedure
The samples shall be subjected to qualification test in the order specified in Table 1. Except for samples in groups 5 and 6, all other groups of samples shall be subjected to group 1 test. Then, the samples shall be divided into 2 to 4 groups according to Table 1 and the tests specified in each group shall be carried out. 4.4.2.1 Standard samples
If standard samples are specified (see 3.1 and 6.2), the three inductors with the electrical properties closest to the specified values shall be selected from the samples that have passed group 1 test in Table 1 as standard samples, and their respective characteristic values shall be marked on the body or on the attached label. Two of them are kept by the superior appraisal agency for storage, and the other one is returned to the manufacturer (see 6.3) for comparison with the electrical properties measured by the quality consistency inspection (see 3.1 and 6.2). 4.4.3 Number of failures
Failure of one or more inductors shall be grounds for refusal to grant qualification approval. Table!
Qualification test
Test or test
Temperature shock
Dielectric withstand voltage
Low air pressure
Insulation resistance
Working torque (when applicable)
Electrical properties (initial value)
Self-resonant frequency
DC resistance
Other electrical properties (see 3.1) (initial value) Coupling percentage (when specified)
Incremental current Inductance change (when specified)
Effective parallel resistance (when specified)
Appearance and mechanical inspection (external)
Requirement clause
3.1,3.4~3.5.3
3.27,3.28
Method clause
Number of test samples\
All samples
(Except samples in group 5.6)
Inspection or test
"Overload"
Resistance to soldering heat||t t||Terminal strength
Electrical properties (final value)
Low temperature storage (-65℃)
Impact (specified pulse)
Electrical properties (final value)
Appearance and mechanical inspection (external)
Appearance and mechanical inspection (internal)
(2 samples)
Mold"
Solderability (2 leads)1)
Flux resistance\
Flammability (Take 3 samples after solderability test)
SJ20037--32
Continued Table 1
Requirement Clauses
3.1,3.4~3.5.3,
3.27.3.28
Identification Test
Method Clauses
3.1,3.4~3.4.6.1
Note: 1) These samples should be clean samples that have not been subjected to other tests. 4.7.1.2
2) After the overload test, the electrical performance test (final value) should be placed for 24 hours. 3) The requirements for the fungus test can be submitted with a certificate or a fungus test. 4) Submit in combination according to Appendix A (see A2.1.2). 4.4.4 Qualification Maintenance
Number of Test Samples"
The Contractor shall prepare a summary of the quality consistency test in the form of a qualification maintenance report every six months and submit it to the superior appraisal agency as the basis for qualification maintenance.
4.5 First Article Inspection (when specified)
The first article inspection shall be carried out by the superior appraisal agency after the contract is signed and before formal production (see 6.2). The samples for the first article inspection shall be inductors produced using general equipment and processes. Approval of the first article inspection Only valid for contracts or order documents requiring identification. If it is to be extended to other contracts or order documents, it must be approved by the user department. 4.5.1 Sample size
Unless otherwise specified (see 6.2), the sample size of inductors submitted for first-article inspection shall be in accordance with the provisions of 4.4.1. 4.5.2 Inspection procedure
SJ20037—92
Unless otherwise specified (6.2), the test procedure shall be in accordance with the provisions of 4.4.2 and Table 1. 4.5.3 Number of failures
One or more Failure of an inductor shall not be grounds for refusal of approval. 4.6 Quality consistency inspection
4.6.1 Batch inspection
The batch inspection of inductors consists of Group A and Group B inspections. 4.6.1.1 The inspection batch
shall consist of inductors of the same type and produced under substantially the same conditions, made of the same materials, with the same detailed specifications and submitted for inspection at the same time. The manufacturer may combine inductors of different inductances and different inductance deviations. The inductance value of the sample shall be approximately representative of the production of the cycle. Inductance value of the batch. 4.6.1.2 Group A inspection
Group A inspection consists of the items and sequence specified in Table 2. Table 2 Group A inspection
Inspection or test
"Temperature shock"
Working torque (when applicable)
Electrical properties (initial value)
Appearance and mechanical inspection (external)
Required clauses
3.1.3.4~3.5.3,
3.27,3.28
Note: 1! Measurement after temperature shock, not applicable. 4.6.1.2.1 Sampling Plan
Method Clause
AQL (Percentage of Defective Products)
Major Defects
Minor Defects
The sampling and inspection of inductors shall comply with the GJB179 normal sampling plan general inspection level I, the acceptable quality level (AQL) shall be as specified in Table 2, and the major defects and minor defects shall be as specified in GJB179. 4.6.1.2.2 Rejected Lot
If an inspection lot is rejected, the contractor may rework it to correct the defects, or remove the defective products and submit them for inspection again. The re-inspection lot shall be subject to stricter inspection. Such a lot shall be distinguished from the newly submitted lot and shall be marked as a re-inspection lot. 4.6.1.3 Group B Inspection
Group B inspection consists of the items and sequence specified in Table 3. The samples for Group B inspection shall be the samples that have passed Group A inspection. Table 3 Group B inspection
Dielectric withstand voltage
Low pressure
Insulation resistance
Electrical properties (initial value)
4.6.1.3.1 Sampling plan
Requirement clause
Method clause
SJ20037-92
Sampling plan according to GJB179 One normal sampling Special inspection level S-4. AQL is 2.5.4.6.1.3.2 Rejected batch
If an inspection batch is rejected, the contractor may rework it to correct the defects, or remove the defective products and submit it for inspection again. The re-inspection batch should be subject to stricter inspection. Such a batch should be distinguished from the newly submitted batch and should be marked as a re-inspection batch. 4.6.1.3.3 Sample Handling
Samples that have passed the Group B test can be delivered in accordance with the contract or order documents as long as the batch passes the test, the electrical properties of the samples remain within the specified range, and meet the appearance and mechanical inspection requirements, and the lead-out terminals are clean and flat. 4.6.2 Periodic Inspection
Periodic inspection consists of Group C inspection. Except as provided in 4.6.2.1.4, products that have passed the Group A and Group B inspections shall not be delayed in delivery due to waiting for the results of the Group C inspection. 4.6.2.1 Group C Inspection
Group C inspection shall be carried out in accordance with the items and sequence specified in Table 4. Samples shall be taken from batches that have passed the Group A and Group B inspections for Group C inspection.
Table 4C Group Inspection
Inspection or test
1 Group (every quarter)
Electrical properties (initial value)
Resistance to welding heat
Terminal strength
Electrical properties (final value)
2 Group (every quarter)
Electrical properties (initial value)
Low temperature storage
Shock (specified pulse)
Electrical properties (final value)
Appearance and mechanical inspection
(internal)
3 Group (every six months)
Degree shock2)
Electrical Performance (initial value)
Electrical performance (final value)
4 groups (every six months)\)
Solderability (2 leads)
Solvent resistance
Flammability
Requirement clause
3.1,3.4~3.4.6,
Method clause
Number of samples to be tested
16 samples with the highest inductance value
6 samples with the lowest inductance value
6 samples with the highest inductance value
6 samples with the lowest inductance value
Number of unqualified products allowed
Note: 1) Only 2 samples need to be dissected.
SJ20037-—92
2) Unqualified products due to temperature shock must be replaced before life test. 3) Nine samples of any inductance value shall be tested in four groups, of which six are for solderability and three are for solvent resistance. Three samples after solderability test shall be tested for flammability.
4.6.2.1.1 Sampling plan
Inductors of the same model, same core material and same detailed specification shall be sampled according to the provisions of each group in Table 4. Inductors delivered more than 24 months shall also be tested in Group C according to Table 4. 4.6.2.1.2 The number of unqualified products in Group C test shall not exceed the provisions of Table 4. 4.6.2.1.3 Sample handling
Samples that have undergone Group C test shall not be delivered according to the contract or order documents. 4.6.2.1.4 Failure
If the sample fails the Group C test, the acceptance and delivery of the product shall be stopped. The contractor shall notify the qualification appraisal unit of the failure. After taking corrective measures, all tests or inspections shall be repeated according to the opinion of the qualification appraisal unit, or only the failed items shall be tested or inspected (determined by the superior appraisal agency or the user). If the test is still unqualified, the failure shall be notified to the qualification appraisal unit. 4.7 Inspection method
4.7.1 Appearance and mechanical inspection
4.7.1.1 External inspection
The weight, material, external design, structure, overall dimensions, marking and processing quality of the inductor shall be inspected to see if they meet the specified requirements (see 3.1, 3.4~3.5.33.27 and 3.28). 4.7.1.2 Internal Inspection
The inductor material, internal design, structure and processing quality shall be inspected to see whether they meet the specified requirements (see 3.1, 3.4~3.4.6.1, 3.27).
4.7.2 Temperature Shock (see 3.6)
The inductor shall be tested in accordance with the provisions of GJB360.7. The following details and exceptions shall be used during the test: a. Test condition A-1 is used for identification inspection and group C inspection under "use status" (see 6.6); test condition A is used for group A inspection not under "use status". Step 3 shall be carried out at the highest temperature of the class. b. Post-cycle measurements shall be made according to 4.7.6, 4.7.3 and 4.7.5 to determine the winding electrical continuity, dielectric withstand voltage and insulation resistance.
4.7.3 Dielectric withstand voltage (see 3.7)
Inductors shall be tested in accordance with the provisions of GJB360.27. The following details shall be used during the test: a. Special preparation or conditions The cylindrical insulated inductor is fixed in a 90° metal V-groove using a metal strip with a conductive moisture-proof elastic material liner with a thickness of 1.9mm. The dielectric constant of the liner material is less than 1000Ω-cm, and the liner material is close to the inductor and connected to the surface of the metal strip. The inductor body should not extend beyond the V-groove or the elastic material. The surface of the V-groove should be free of dirt. The inductor leads should be placed so that the distance between them and any point of the V-groove is not less than the difference between the inductor radius and the lead radius. The metal V-groove should be non-corrosive. b. Test voltage Unless otherwise specified (see 3.1 and 6.2), the AC test voltage shall be at least 1000V. The leakage current shall not exceed 100uA, and the voltage application duration shall be at least 60s. c. Test voltage application point Unless otherwise specified (see 3.1 and 6.2), the test voltage shall be applied between the interconnected inductor lead terminals and the V-groove, and the V-groove and metal strip shall be at ground potential. 10
SJ20037-92
d. Post-test inspection shall inspect the inductor for damage caused by sparking, arcing, breakdown or other damage. 4.7.4 Low pressure (when applicable) (see 3.8) For inductors designed to operate at altitudes above 3048m, the test shall be carried out in accordance with the provisions of GJB360.5. The following details and exceptions shall be applied during the test:
a. Special preparation or conditions The cylindrical insulated inductor shall be fixed in a 90° metal V-groove using a metal strip with a conductive moisture-proof elastic material liner with a thickness of 1.9mm. The resistivity of the liner material is less than 10002-cm, and the liner material is close to the inductor and connected to the surface of the metal strip. The inductor body shall not protrude beyond the V-groove or the elastic material. The surface of the V-groove shall be free of dirt. The inductor leads shall be placed so that the distance between them and any point of the V-groove is not less than the difference between the radius of the inductor and the radius of the lead.
b. Test conditions shall be as specified in the detailed specification (see 3.1 and 6.2). Low pressure test Unless otherwise specified (see 3.1 and 6.2), the inductor shall be subjected to an AC test voltage of 50c.
Hz, minimum 200V (effective value) at a pressure of 4.39kPa for at least 60s. d. Test voltage application point Unless otherwise specified (see 3.1 and 6.2), the test voltage shall be applied between the interconnected inductor leads and the V-groove, with the V-groove and the metal strip at ground potential. Post-test inspection shall inspect the inductor for damage caused by sparking, arcing, breakdown or other damage. e.
4.7.5 Insulation resistance (see 3.9)
Inductors shall be tested in accordance with the provisions of GJB360.28. The following details and exceptions shall be applied during the test. Test condition B, but for inductors with a dielectric withstand test voltage less than 500V (see 3.1), test condition a shall be used.
Measuring points Unless otherwise specified (see 3.1 and 6.2), measurements shall be made between insulation points. For cylindrical inductors, measurements shall be made between the inductor winding and the metal strip in the inductor connection device specified in Figure 1, or between the interconnected lead terminals and the V-groove (see 4.7.4d). Non-conductive rod
Metal strip
-Conductive elastic material
Inductor under test
Figure 1 Mounting of inductor during polarization
4.7.6 Winding electrical continuity (see 3.10) All windings of inductors shall be tested for electrical continuity by a suitable method. During the test, the test current applied to the inductor shall not exceed the rated value or the incremental current value (when specified, see 3.1), whichever is less. For ferrite core inductors, the following test circuit shall be used to limit the test current to less than 0.6 mA. 11
Hz, minimum 200V (effective value) AC test voltage, lasting at least 60s. d. Test voltage application point Unless otherwise specified (see 3.1 and 6.2), the test voltage shall be applied between the interconnected inductor lead terminals and the V-groove, and the V-groove and the metal strip shall be at ground potential. Post-test inspection shall inspect the inductor for damage caused by sparking, arcing, breakdown or other damage. e.
4.7.5 Insulation resistance (see 3.9)
Inductors shall be tested in accordance with the provisions of GJB360.28. The following details and exceptions shall be used during the test. Test condition B, but for inductors with a dielectric withstand test voltage less than 500V (see 3.1), test condition a shall be used.
Measurement point Unless otherwise specified (see 3.1 and 6.2), measurements shall be made between insulation points. For cylindrical inductors, the measurements shall be made between the inductor winding and the metal strip in the inductor connection device specified in Figure 1, or between the interconnected lead terminals and the V-groove (see 4.7.4d). Non-conductive rod
Metal strip
-Conductive elastic material
Inductor under test
Figure 1 Mounting of inductor during polarization
4.7.6 Electrical continuity of windings (see 3.10) All windings of inductors shall be tested for electrical continuity by suitable methods. During the test, the test current applied to the inductor shall not exceed the rated value or the incremental current value (when specified, see 3.1), whichever is less. For ferrite core inductors, the following test circuit shall be used to limit the test current to less than 0.6 mA. 11
Hz, minimum 200V (effective value) AC test voltage, lasting at least 60s. d. Test voltage application point Unless otherwise specified (see 3.1 and 6.2), the test voltage shall be applied between the interconnected inductor lead terminals and the V-groove, and the V-groove and the metal strip shall be at ground potential. Post-test inspection shall inspect the inductor for damage caused by sparking, arcing, breakdown or other damage. e.
4.7.5 Insulation resistance (see 3.9)
Inductors shall be tested in accordance with the provisions of GJB360.28. The following details and exceptions shall be used during the test. Test condition B, but for inductors with a dielectric withstand test voltage less than 500V (see 3.1), test condition a shall be used.
Measurement point Unless otherwise specified (see 3.1 and 6.2), measurements shall be made between insulation points. For cylindrical inductors, the measurements shall be made between the inductor winding and the metal strip in the inductor connection device specified in Figure 1, or between the interconnected lead terminals and the V-groove (see 4.7.4d). Non-conductive rod
Metal strip
-Conductive elastic material
Inductor under test
Figure 1 Mounting of inductor during polarization
4.7.6 Electrical continuity of windings (see 3.10) All windings of inductors shall be tested for electrical continuity by suitable methods. During the test, the test current applied to the inductor shall not exceed the rated value or the incremental current value (when specified, see 3.1), whichever is less. For ferrite core inductors, the following test circuit shall be used to limit the test current to less than 0.6 mA. 11
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