This specification applies to AC fixed capacitors with metallized electrodes and polypropylene as dielectric, which are used in electronic equipment. This specification specifies the preferred ratings and characteristics of this type of capacitor, and selects appropriate quality assessment procedures, test and measurement methods, and general performance requirements based on GB2693 standard. The test severity and requirements specified in this sub-specification shall be quoted in the detailed specification, which must be of the same or higher performance level, and no reduction in performance level is allowed. GB/T 14579-1993 Fixed capacitors for electronic equipment Part 17: Sub-specification Metallized polypropylene film dielectric AC and pulse fixed capacitors GB/T14579-1993 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Fixed capacitors for use in electronic equipment
Part 17: Seclional specification Fixed metallized polypropylene rilm dielectric a.c. and pulse fixed capacitors 1 General
1.1 Scope
GB/T 14579.-93
IEC 384-17(1987)
QC301300
This specification applies to fixed AC capacitors with metallized electrodes and polypropylene as dielectric, which are used in electronic equipment. Note: Capacitors with metal pins and metallized electrodes are also included in the scope of this specification. This type of capacitor may have "self-healing characteristics" depending on the conditions of use. The capacitors included in this specification are mainly intended for use under AC voltage and (or) pulse conditions, with a maximum reactive power of 1000Var and a maximum peak voltage of 3000V. This specification does not include capacitors with a reactive power greater than 20μF. This specification does not include capacitors with a reactive power exceeding 500Var at 501Iz, unless their maximum reactive power is less than 50oVal at 50Hz
The maximum peak voltage is 2500V. This standard includes two performance levels of capacitors: Level 1 for long life and Level 2 for general use. This specification does not include fixed capacitors for suppressing electromagnetic interference and capacitors for preventing electric shock. 1.2 This specification specifies the preferred ratings and characteristics of this type of capacitor, and selects appropriate quality assessment procedures, test and measurement methods, and general performance requirements based on GB2693 standard. The test severity and requirements specified in this sub-specification cited in the detailed specification must be of the same or higher performance level, and no reduction in performance level is allowed. 1.3 Reference standards
GB3211
Preferred numbers and priority number systems
GB 2471
GB 2691
GB2693
IEC 68-1
Nominal resistance series of resistors and nominal capacity series of fixed capacitors for electronic equipment and their allowable deviation seriesResistors and capacitors marking content and marking methodFixed capacitors for electronic equipment Part 1: General specification (for certification purposes)Basic environmental test procedures Part 1: GeneralIEC 68-2-1i
Test A Cold
IEC 68-2-2 Test B Dry heat
IEC68-23 Test Ca Steady-state heat
IEC 68-2-6: Test Fc Vibration (sinusoidal) 1E 68-2-13
IFEC 68-2-14
Test M
[Low pressure
Test rapid change of humidity
Approved by the State Administration of Technical Supervision on August 27, 1993 and implemented on April 1, 1994
IEC.68-2 20 Test T pot welding
IEC 68-2-21
GB/T14579—93
Test lead-out terminal and whole assembly installation strength
IEC 68-2-27 Test Eb
IEC 68-2-30 Test Db Cyclic Damp Heat
IFC410 Sampling Plan and Procedure for Inspection by Counting IECQ/QC001001 IEC Electronic Component Quality Assessment System (IECQ) Basic Regulations IECQ/QC00[002 IEC Electronic Component Quality Assessment System (IECQ) Procedure Rules Note: Except for IEC68, ​​the above standards adopt the current versions. For IEC68, ​​the version referenced in the corresponding test clause of the general specification should be used. 1.4 Contents to be specified in the detailed specification
The detailed specification should be written based on the relevant blank detailed specification. The requirements specified in the detailed specification should not be lower than the requirements of the general specification sub-specification or blank detailed specification. When more stringent requirements are included, these requirements should be included in 1.9 of the detailed specification and explained in the test list. Note: For convenience, the contents specified in 1.4.1 can be expressed in a table. Each detailed specification should specify the following contents. The various referenced values ​​should be selected from the values ​​specified in the corresponding clauses of this sub-specification. 1.4.1 Outline Drawing and Dimensions
To facilitate identification and comparison with other capacitors, an outline drawing of the capacitor shall be provided. The detailed specification shall also specify the dimensions and their allowable deviations that affect interchangeability and installation. Usually, the length, width and height of the capacitor body and the spacing of the leads shall be given. For cylindrical capacitors, the length, diameter and lead size of the body shall be given. When necessary, for example, when the detailed specification includes several items (capacitance value and voltage value range), the dimensions and their allowable deviations shall be placed in a table below the outline drawing. When the outline dimensions are different from the above form, the detailed specification shall specify the dimensional data sufficient to describe the capacitor. When the capacitor is not designed for use on a printed circuit board, it shall be clearly stated in the detailed specification. 1.4-2 Installation
The detailed specification shall specify the installation method for normal use and for vibration, collision and impact tests. The capacitor shall be installed in the normal manner.
1.4.3 Ratings and Characteristics
The ratings and characteristics shall comply with the relevant provisions of this specification and the following requirements. 1.4.3.1 Nominal Capacitance Range
See 2.2.1,
Note: When the detailed specification allows different capacitance specifications for the product, the following statement should be added: "The various numerical specifications within each capacitance range should be given in the list of qualified products for inspection".
1.4.3.2 Sinusoidal Current (When Applicable)
The detailed specification shall specify the derating curves for sinusoidal current and 70°C, sinusoidal current and frequency, and sinusoidal current and capacitance.
1.4.3.3 Special Characteristics
If special characteristics are considered necessary to fully describe the design and application purpose of the component, these additional characteristics should be listed. 1.4.3.4 Welding
The detailed specification shall specify the test methods, severity and requirements for weldability and resistance to welding heat. 1.4.4 Marking
The detailed specification shall specify the marking contents on the container and packaging. If it is different from 1.6 of this specification, it shall be clearly stated. 1.5 Terminology
In addition to the terms and definitions of GB 2693, the following also apply. 1.5-1 Performance level
1.5.1.11-level performance capacitor (long life) GB/T 14579-93
Capacitors for long life use with strict requirements on electrical parameters. 1.5.1.22-level performance capacitor (general use) Capacitors for general use that do not require electrical parameters as strict as those of Class 1 capacitors. 1.5.2 Stability level
The stability level is defined as the drift of capacitance after climatic and mechanical tests, and after durability tests. The performance level and stability level shall be stated in the detailed specification.
1.5.3 Combination of performance level and stability level (when stability level is required for AC and pulse capacitors). The following table lists the combinations of performance level and stability level (preferred values): Performance level
Stability level
Combination symbol
The three combinations of performance level and stability level are related to the values ​​of power, stability and loss tangent. The differences in the characteristics of the three combinations are explained in Section 2.
1.5.4 Rated voltage
Method: The sum of the AC voltage and the peak impulse voltage applied to the capacitor shall not exceed the rated voltage. 1.5.4.1 The rated DC voltage
is the maximum DC voltage that can be applied continuously to the capacitor at the rated temperature. 1.5.4.2 The rated AC voltage
is the maximum RMS voltage that can be applied continuously to the capacitor at the rated temperature and a given frequency. 1.5.4.3 The rated impulse voltage
is the peak impulse voltage that can be applied continuously to the capacitor at the rated temperature and a given frequency. 1.5.5 Rated voltage pulse slope (
(if applicable))
is the maximum permissible value of the pulse voltage slope at the rated temperature (the temperature does not cause a significant increase in the repetition frequency).
1.6 Marking
shall be in accordance with Article 2.4 of GB 2693 and the following provisions. 1.6.1 The contents listed in the mark are usually selected from the following items. The relative importance of each item is expressed in the order in which it is listed:
Nominal capacitance:
Rated AC and (or pulse voltage (AC voltage can be represented by the symbol ~) and the corresponding rate, potential difference from the nominal capacitance allowable deviation at 50Hz;
Rated voltage pulse slope (if applicable);
Rated current and corresponding rate (if applicable); Manufacturing year, month (or week);
Manufacturer's name or trademark,
Climate category;
Model name:
Detailed specification number.
1.6.2 The capacitor should be clearly marked. Items 8, b and c of the above content, and the remaining items deemed necessary should be marked as much as possible. Duplication of content should be avoided in the marking on the capacitor.
GB/T 14579—93
1.6.3 The packaging of capacitors shall be clearly marked with all items listed in 1.6.1. 1.6.4 The addition of any additional mark shall not cause confusion. 2 Preferred ratings and characteristics
2.1: Preferred characteristics
The values ​​given in the detailed specifications shall be selected from the following ranges. 2.1.1 Preferred climate categories
Capacitors covered by this specification shall be classified into climate categories in accordance with the provisions of 1EC68-1 General Rules, lower category overflow and upper category temperature and steady-state damp heat test The duration of the test should be selected within the following ranges, lower category temperature: -55°C, -40°C, -25°C and -10°C: F. upper category temperature: +70°C, +85°C and +100: Duration of steady-state damp heat test: 4, 10, 21 and 56d; the severity of the cold and hot tests is the corresponding lower category temperature and upper category temperature. 2-2 Preferred rated values ​​
2.2.1 Nominal capacitance (Ci)
The preferred value of the nominal capacitance base is selected from the E series given in GB2471. 2.2.2 Allowable deviation of nominal capacitance
The preferred allowable deviation of the nominal capacitance is ±20%, ±10%, 1.5%, ±2%, ±1%. 2.2.3 Nominal capacitance and related allowable deviations The preferred combination of capacitance series and allowable deviations is shown in the following table.
2.2.4 Rated AC voltage (UR. or UR-) The frequency of the rated AC voltage should be 50/60Hz, unless the detailed specification specifies a higher frequency. The rated AC voltage (RMS value) should be selected from the R10 or R20 specified in GB321 "Preferred series" The detailed specification should specify the allowable Derating curves for the rms voltage-temperature (above rated voltage), and the rms voltage-frequency relationship (if applicable).
2.2.5 Category AC voltage (U/ca. or Uc-) 1 When the category limit is equal to 85°C, the category AC voltage is equal to the rated AC voltage. At the upper category temperature of 100°C, the category AC voltage is equal to 0.7UR--.
2.2.6 Rated temperature
When the upper category temperature is equal to or greater than 85°C, the rated temperature is 85°C; for the upper category temperature <85°C, the rated temperature is equal to +10 of the upper category temperature.
Note: The rated temperature of the AC is 15°C lower than the rated temperature of the DC. 2.2.7 Rated AC current (when required in the detailed specification) The detailed specification shall specify:
-Frequency:
GB/T 14579-93
--Rated RMS value of AC current at specified frequency (selected according to R10 or R20 series); -Derating curve of AC current ambient temperature for capacitors. 3 Quality assessment procedure
3.1 Initial stage of manufacture
The initial stage of manufacture is the winding of the capacitor core or an equivalent operation. 3.2 Structurally similar components
Structurally similar capacitors are capacitors produced by the same process and materials. They may have different case sizes or different ratings.
3.3 Record of certification of release of batches
When specified in the detailed specification and required by the ordering party, the contents required in 3.5.1 of GB2693 shall be applicable. After the durability test, the parameters that need to provide the change are the change in capacitance, loss tangent, and insulation resistance. 3.4 Approval
The procedure for the approval test is as specified in 3.4 of GB2693. The list of tests used for approval based on batch and periodic tests is given in 3.5 of this specification. The list procedure using a fixed number of samples is given in 3.4.1 or 3.4.2 below. 3.4.7 Approval based on a fixed sample size procedure. Sampling:
The fixed number of samples procedure is specified in 3.4.2h1 of GB2693. The sample should be a representative product of the range of capacitors required for approval, which may or may not be covered by the detailed specification. The sample shall consist of samples of the lowest and highest voltages and of the minimum and maximum capacitances at these voltages. When there are more than four rated voltages, the intermediate voltages shall also be tested. Thus, in order to approve a range of products, four or six values ​​(capacitance/voltage combinations) may be tested. When the range consists of less than four values, the number of samples tested shall be equal to the number required for the four values. The following backup samples are permitted:
a. Only one sample of each value may be used to replace the permitted nonconforming products in the group. b. One sample of each value may be used to replace the sample which is nonconforming due to reasons not attributable to the manufacturer. The number of samples specified in the group is provided on the assumption that all the values ​​are tested. If this is not the case, the number of samples may be reduced accordingly.
When a test group is added to the list of test approval tests, the number of samples required for the group shall also be increased by the number required for the additional test group.
Table 1 specifies the number of nonconforming products allowed for the number of samples tested in each group or subgroup for the "identification and approval test". 3.4.2 Tests
Capacitors covered by a detailed specification must undergo the full series of tests specified in Tables 1 and 2 during identification and approval. The tests in each group shall be carried out in the specified order. All samples shall be subjected to group 0 tests and then divided into other groups. Samples found to be nonconforming in group 0 tests shall not be used in other groups. When a capacitor fails to meet all or part of the tests in a certain test group, it is considered a "nonconforming product". When the number of nonconforming products does not exceed the allowable number of nonconforming products specified in each group or subgroup and the total allowable number of nonconforming products, the identification and approval shall be given.
Note: Tables 1 and 2 together form a fixed number of sample test schedules, where Table 1 includes details of sampling and the number of permissible nonconforming items for different tests or test groups, while Table 2 gives a complete summary of the test conditions and performance requirements together with the detailed provisions of the tests included in Chapter 4, and also indicates the selection that must be made in the detailed specification, such as test methods and test conditions. The test conditions and performance requirements in the fixed number of sample test schedules should be the same as those specified for quality consistency inspection in the detailed specification of Group No.
GB/T 14579-93
. Table 1 Sampling plan and allowable number of unqualified products for identification and approval test of AC and pulse capacitors Number of samples (n) and allowable number of unqualified products (pl) This specification
Test item
Appearance inspection
Capacitance
Loss angle
Withstand voltage
Insulation resistance
Electromagnetic 5
Backup sample
Terminal strength
Resistance to welding heat
Component resistant to olefins
Portable
Marking resistant to flux
Rapid temperature change
Collision!
Climate sequence
Steady-state damp heat
Endurance test at 50Hz/60Hz AC voltage Endurance test with stop current or voltage\ Pulse durability test
Temperature characteristics"
Charging and discharging\
Juice: 1) As per the detailed specification requirements
2) For any value, no more than 1 failure is allowed. 3) For capacitance/voltage combination, see 3.4.1 4 for each detection"
t F5)\
4) This test is not required when a pulse durability test is required. 5) Perform if required in the detailed specification. Four values ​​or less than four
values ​​test"
(—20)5)
(+20)§
Six values ​​test"
(+30)）
CB/T 14579—93
Table 2 List of identification and approval tests
Note: The test clause number and performance requirements are quoted from the table in Chapter 4:D-destructive; D-non-destructive. Clause number and
Test items
(See Note (i))
4.1 External inspection
4.1 Dimensional details)
4.2.2 Capacitance
4.2.3 Loss factor cut-off (tg)
4.2.1 Withstand voltage
4.2-4 Insulation resistance
1.2.5 Inductance
If applicable)
【If applicable)
4.3.1 Initial test
||4.3 Terminal strength
4.4 Resistance to soldering heat
4.4.2 Final product
Test conditions
(See Note@)
Frequency: 1l1z
Method: As per detailed specification
Method: As per detailed specification
Method: As per detailed specification
Capacitance
Loss tangent:
For (1μF
at 1kHz
at 10kHz
Appearance inspection
Aging
Method: According to detailed specification
(IA or 1B)
Appearance inspection
Electrical measurement
! Loss tangent
Test and measurement procedures,
Number of samples (n)
And the number of unqualified products
See Table 1
Energy requirements
(See Note)
See 1.1 Marking is clear and in accordance with See detailed specifications for the provisions of the detailed specifications
Within the specified deviation
According to Article 4.2.3.2
No breakdown or arcing
According to Article 4.2.4.2
Inductance: mH
(See detailed specifications)
No impregnation material is vacated to form
Harmful deformation of the shell
See table]
No visible damage
No visible damage
Clear markings
AC/.According to 4. 3.1 Measured values: For 1.1 level: 1% 1.2 level ≤ 2% 2 level: 3% Compared with the measured values ​​in 4.3.1, 1.g is increased: For [μF] Item number and Test item (see Note ()) 4.14 Component resistance to solvents (if applicable) 4.5 Solderability 1.15 Standard resistance to solvents (if applicable) 4.6.1 Initial measurement 5 Rapid temperature change 4.7 Vibration GB/T 14579--93
Continued Table 2
Number of samples (）
Test items
(See Note)
Solvent temperature..
Method: 2
No aging
Method: According to detailed specification
Solvent temperature
Method: 1
Washing material: Degreasing structure
Recovery time
Capacitance
Report loss angle tangent:
For ten Cr>lμF:
At 1kHz
CkμF:
8A—lower category temperature
=upper category temperature
5 cycles
Duration time, 30min
Appearance inspection
Installation method: as per detailed specification
Burying procedures
And the number of unqualified products allowed
See Table 1
See Table 1
1.1 Grade: ≤0.001
1. 2 Grade: 1102
2 Grade: ≤0.004
Performance requirements
(See Note (1))
For Ck1μF, see detailed specification
See detailed specification
Plating is good. As applicable, the solder should flow freely when the terminal is wetted, or the solder should flow inside.
Marking is clear
No visible damage
Clause number and
Test items
(See Note ()
4.7.2 Final pull
4.8 Collision (or impact, see 4.9)
4.9 Breakout (or bump, see 4.8)
4.R.3 or 4.9.3
Final shear test
4.10 Climate sequence
4.10.2 Dry heat
4.10, 3 cycle damp heat test Db,
First cycle
4.10.4 Cold
GB/T 14579---93
Continued Table 2
Product group (n)
Test conditions
(see note)
Tide rate range. From Hz to
Amplitude, 0.75mm or
Acceleration: 98t/(take the smaller severity)
Total duration: 6h
Appearance inspection
Installation method: as per detailed specification
Number of collisions
Acceleration: m/a2
Pulse duration. ms
Installation method: as per detailed specification
Acceleration*m/g*
Pulse duration.* ms
Appearance inspection
Capacitance
Loss tangent
Insulation resistance
Temperature: upper limit category temperature
Duration: 16h
Temperature, lower limit category overflow
and the number of unqualified products allowedWww.bzxZ.net
see Table 1
No visible damage
No visible damage
Performance requirements
(see note)
AC/C According to the measured values ​​in 4.6.1:
For 1.1 level ≤1%
1.2 level: ≤2%
2 level: ≤3%
Compared with the measured values ​​in 4.6.1, the tg number is increased:1 For Cn≤1μF:
1.1; etc. 0.001
1.2 level: ≤0.002
2 level: 50.001
For Cα>1μF: according to the detailed specification
24.2.1.2 50% of the values ​​specified in the clause See Table 1 Clause number and Test items (see the company) 4.10.5 Low pressure (if detailed specification requirements] 4.10.5,3 Intermediate measurement 4.10.6 Cyclic damp heat, test Db Remaining cycles 4.10.6.2 Final measurement 4.11 Steady-state damp heat 4.11,1 Initial measurement
GB/T14579—93
Continued Table 2
Number of samples (n)
Test conditions
(see notes)
Duration: 2h
Low pressure: 8.5kPa
(85mbar)
Appearance inspection
Appearance inspection
Capacitance
Loss angle cut-off
Insulation resistance
Capacitance
Loss angle tangent: at 1kHz
Appearance inspection
Capacitance
Loss angle cut
Insulation resistance
And allowable margin
Qualified number
See Table 1
See Table 1
Performance requirements
(See Note ①)
No permanent breakdown, flying or harmful deformation of the shell. No visible damage
Clear marking
AC/C according to 4. 4.2, 4.B.3 or 4.9.3 (applicable> measured value
For 1.1 level; ≤1%
1.2 level; ≤3%
2 level: ≤5%
Compared with the measured value of 4.3.1 or 4.6.1 (as applicable), the t number is increased:
For C1μF
1.1 level: ≤0.0015
1.2 level, ≤003
2 level 0.005
For>1uF according to the detailed specification
24.2.4.2 50% of the value specified
No visible damage, clear marking
△C/C and 4.Compared with the values ​​measured in 4.11.1, tg3 increases for CIF, ≤0.001 for 1st level, ≤0.001 for 2nd level, 0.002 for C>uF, according to 50% of the values ​​specified in 4.2.4.2 of the detailed specification, tea model and test item (see Note ①). 4.12.150/60H AC voltage durability (if applicable). 4.12.1. I Initial measurement
4.12.1.3 Final measurement
3R-group
4.12.2 Endurance test with sinusoidal current or voltage (if applicable)
4,12.2.1 Initial measurement
4.12.2.3 Final measurement
CB/T 1457993
Continued Table 2
Number of samples (n)
Test conditions
(See Note@)
Duration: 1000h
Capacitance
Power loss tangent:
For CR>1μF:
At 1kHz
At 10kiz
Appearance inspection
Capacitance
Power loss tangent
Insulation resistance
Duration, 1000h
Frequency.Hz
Capacitance
Power consumption tangent:
For Ck>1μF:
At 1kHz
At 10kHz
Appearance inspection
Capacitance
And the number of unqualified products allowed
See Table 1
See Table 1
No visible congestion
Clear marking
Performance requirements
(See Note 0))
2C/C Compared with the values ​​measured in Article 4.12.1.1:For Level 1: ≤5%
Level 2: ≤10%
Compared with the values ​​measured in Article 4.12.1.1, tg increasesFor cIμF:
Level 1: 0.0015
Level 2: ≤0.003
For C>1iF according to the detailed specification
≥50% of the values ​​specified in Article 4.2.4.2..
No visible interference
Clear marking
aC/CCompared with the values ​​measured in Article 4.12.2.1: 3C41
Clause number and
Test item!
(See foreign)
4.12.3 Pulse durability test
(Recommended and applicable)
4.12.3.1 Initial measurement
4.12.3.3 Final measurement
GB/T 14579—93
Continued Table 2
Number of samples (n)
Test conditions
(See Note)
Positive average loss angle
Insulation resistance
Duration: 10001
Repetitive pulse rate.-Hz
Discharge time constant: According to
Applied peak voltage: Equal to
Rated peak voltage (see detailed specifications)
Capacitor
Loss angle cutoff:
For Ck>1μF
At 1kHz
CRsμF:
At 10kHz
Appearance inspection
Capacitance
Loss angle cutoff
Insulation resistance| |tt||And the number of unqualified products allowed
See Table 1
See Table 1
For Level 1: 55%
Level 2: ≤10%
Performance requirements
(See foreign)
Compared with the measured values ​​in Article 4.12.2.1, the museum adds: For ClaF:
Level 1: #0.0015| |tt||Grade 2, 0.003
For C>1μF: According to the detailed specification
50% of the value specified in Article 24.2.4.2
No visible damage
Clear marking
△C/C Compared with the value measured in Article 4.12.3.1: For Grade 1: 5%
Grade 2+≤103%
Compared with the value measured in Article 4.12.3.1, tgo increase: For ≤1μF
Grade 1: 0.0015
Grade 2: 0.003
For C1μF: According to the detailed specification
50% of the value specified in Article 24.2.4, 2
At 10kHz
Appearance inspection
Capacitance
Loss angle cut-off
Insulation resistance
And the number of unqualified products allowed
See Table 1
See Table 1
For level 1: 55%
Level 2: ≤10%
Performance requirements
(See foreign)
Compare with the measured values ​​in 4.12.2.1, Addition: For ClaF:
Grade 1: #0.0015
Grade 2, 0.003
For C>1μF: According to the detailed specification
50% of the value specified in Article 24.2.4.2
No visible damage
Clear marking
△C/C Compared with the value measured in Article 4.12.3.1: For Grade 1: Sensitivity 5%
Grade 2 + ≤103%
Compared with the value measured in Article 4.12.3.1, tgo Addition: For ≤1μF
Grade 1: 0.0015
Grade 2: 0.003
For C1μF: According to the detailed specification
50% of the value specified in Article 24.2.4, 2
At 10kHz
Appearance inspection
Capacitance
Loss angle cut-off
Insulation resistance
And the number of unqualified products allowed
See Table 1
See Table 1
For level 1: 55%
Level 2: ≤10%
Performance requirements
(See foreign)
Compare with the measured values ​​in 4.12.2.1, Addition: For ClaF:
Grade 1: #0.0015
Grade 2, 0.003
For C>1μF: According to the detailed specification
50% of the value specified in Article 24.2.4.2
No visible damage
Clear marking
△C/C Compared with the value measured in Article 4.12.3.1: For Grade 1: Sensitivity 5%
Grade 2 + ≤103%
Compared with the value measured in Article 4.12.3.1, tgo Addition: For ≤1μF
Grade 1: 0.0015
Grade 2: 0.003
For C1μF: According to the detailed specification
50% of the value specified in Article 24.2.4, 2
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