ECA 479-A-1993 Film-Paper Film Dielectric Capacitors for 50 60 Hz Voltage Doubler Power Supplies.pdf

1、4: I Q, h * I 4: w EIA 479-A 93 W 3234600 0506974 63T W RcpmdudByGLOML ENGINEERING DOCUMENTS Wh The Pumissian of EIA Under Royalty Ammeni ANSI1 EIA-479-A-1993 APPROVED: March 29, 1993 EIA STANDARD Film-Paper, Film Dielectric Capacitors for 50/60 Hz Voltage Doubler Power Supplies EIA-479-A (Revision

2、of EU-479) MAY 1993 ELECTRONIC INDUSTRIES ASSOCIATION ENGINEERING DEPARTMENT EIA 479-A 93 3234600 0506975 576 W NOTICE O EIA Engineering Standards and Publications are designed to serve the public interest through eliminating misunderstandings between manufacturers and purchasers, facilitating inter

3、changeability and improvement of products, and assisting the purchaser in selecting and obtaining with minimum delay the proper product for his particular need. Existence of such Standards and Publications shall not in any respect preclude any member or nonmember of EIA from manufacturing or selling

4、 products not conforming to such Standards and Publications, nor shall the existence of such Standards and Publications preclude their voluntary use by those other than EIA members, whether the standard is to be used either domestically or internationally. Recommended Standards and Publications are

5、adopted by EIA in accordance with the American National Standards Institute (ANSI) patent policy. By such action, EIA does not assume any liability to any patent owner, nor does it assume any obligation whatever to parties adopting the Recommended Standard or Publication. This EIA Standard is consid

6、ered to have International Standardization implication, but the International Electrotechnical Commission activity has not progressed to the point where a valid comparison between the EIA Standard and the IEC document can be made. This Standard does not purport to address all safety problems associa

7、ted with its use or all applicable regulatory requirements. It is the responsibility of the user of this Standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations before its use. Published by ELECTRONIC INDUSTRIES ASSOCIATION 1993 Engi

8、neering Department 2001 Pennsylvania Ave. N.W., Washington, D.C. 26 PRICE: Please refer to the current Catalog of EIA & JEDEC STANDARDS & ENGINEERING PUBLICATIONS or call Global Engineering Documents, USA and Canada (1-800-854-71 79) International (303-792-21 81) All rights reserved Printed in U.S.A

9、. EIA 479-A 93 = 3234600 0506976 402 PLEASE! DONT VIOLATE THE LAW! This document is copyrighted by the EL4 and may not be reproduced without permission. Organizations may obtain permission to reproduce a limited number of copies through entering into a license agreement with the ELL For information,

10、 contact: EIA Engineering Publications OfFce 2001 Pennsylvania Ave., N.W. Washington, D.C. Zoo06 (202)457-4963 EIA 477-A 93 3234LOO 0506977 349 = FI LM-PAPER, FI LM DIELECTRIC CAPACITORS FOR 50/ Hz VOLTAGE DOUBLER POWER SUPPLIES CONTENTS Section 1. Scope 2. Definitions 3. Standard Designations 4. Ap

11、plicable Documents 5. Standard Test Conditions 6. Quality Assurance 7. Visual and Mechanical Examination 8. Marking 9. Dielectric Withstanding Voitage Test - 1 O. Capacitance Test 11. Dissipation Factor Test 12. Seal Test 13. Corona Test 14. Vibration Test 15. Salt Spray Test 16. Protective Device 1

12、7. Solderability 18. Terminal Strength 19. Humidity Test 20. Capacitance Change with Temperature 21. Accelerated Life Test 22. Application Notes i EIA-479-A Paae 1 1 2 5 5 5 7 7 8 8 8 8 8 9 9 9 9 9 9 10 10 11 EIA 479-A 93 = 3234600 0506978 285 EIA-479-A FILM-PAPER, FILM DIELECTRRIC CAPACITORS FOR 50

13、/60 Hz VOLTAGE DOUBLER POWER SUPPLIES CONTENTS (continued) Ref ere n ce APPENDIX A APPENDIX B APPENDIX C APPENDIX D APPENDIX E Section Typical Terminal Configuration Typical Capacitor Ratings Used for Microwave Oven Power Supplies Determination of Capacitor Voltage Rating Case Dimension Details Moun

14、ting Bracket Details II Paae 14 15 16 17 18 EIA Li77-A 93 W 3234600 0506779 LLL W EIA-479-A Page 1 FILM-PAPER, FILM, DIELECTRIC CAPACITORS FOR 50/60 Hz VOLTAGE DOUBLER POWER SUPPLIES (From EIA Standard Proposal No. 2814, formulated under the cognizance of EIA P-2.2 Subcommittee on Plastic and Paper

15、Dielectric Capacitors) 1. 2. 2.1 a 2.2 2.3 SCOPE This standard describes the requirements for film-paper and film dielectric capacitors impregnated and/or filled with non-PCB oil. They are intended for use in half wave or full wave voltage doubler power supplies of microwave ovens or other equipment

16、 operated from 50-60 Hz power lines. DEFI NITIONS Rated Voltage Rated voltage is the maximum steady-state root-mean-square (rms) operating voltage and is equal to the: peak-to-peak voltage/(2*(2).5) Rated voltage shall not include the dc component of an application. Peak-to-peak voltage is the maxim

17、um total change in voltage applied between the capacitor terminal during repetitive cycles. Rated Case Temperatures Rated case temperature is the maximum allowable hot spot developed at any point on the case surface. Service Life Objective The service life objective is the design life capability as

18、determined by accelerated life tests and/or data from field performance. (See 22.1). E IA-479-A Page 2 3. 3.1 3.2 EIA 479-A 93 m 3234600 05Ob980 733 m e STANDARD DESIGNATION EIA Standard designation shall consist of eight constituent parts as illustrated below and options indicated below: 4790076 Dl

19、PIH PRGorg -0moNs Life Ob/ccrlve Case type shall be identified by a single letter. All cases shall be of deep drawn or extruded construction with double-rolled cover seams. NOMINAL DIMENSION OVER SEAM COVER Case Inches Millimeters Shape A B C D 3.3 3.4 2.1 6 x 1.31 54.9 x 33.3 (1 - 1/4“) Flat Oval 2

20、.69 x 1.56 68.3 x 39.6 (1 - l/P) Flat Oval 2.91 x 1.91 73.9 x 48.5 (1 - 3/49 Flat Oval 3.66 x 1.97 93.0 x 50.0 (2) Flat Oval Rating numbers are noted on a parts list sheet in Appendix B, for each capacitance and voltage rating. This is a three digit sequential nonsignificant number that has been ass

21、igned by EIA. Characteristic shall be identified by a single letter to denote the rated case temperature range of the capacitor as shown below: Case Operating Storage O to +60 degrees C Characteristic Temperature Ranae TemDerature Ranae M -55 to +60 degrees C D O to +70 degrees C -55 to +70 degrees

22、C P O to +85 degrees C -55 to +85 degrees C EIA 477-A 73 3234600 050678L 87T H EIA-479-A Page 3 3.5 Service life objective shall be identified by a single digit code as shown below: Code 1 2 3 4 Life Obiective 1,000 hours 1,500 hours 2,000 hours 3,000 hours 3.6 Finish shall be identified by a single

23、 letter as shown below. Letter TvDe of Finish N No finish subsequent to case fabrication P Underwriters Laboratories Recognized Paint 3.7 Terminals shall be identified by a single digit code as shown below: Code Terminals 1 Standard insulating cup 1/4“ quick connect two tines 2 Standard insulating c

24、up 1/4“ quick connect four tines 3 Standard insulating cup 1/4“ quick connect three tines and forked solder lug 5 same as code 1 except high insulating cup 6 Standard insulating cup 1/4“ quick connect two tines one terminal - three tines second terminal 7 Same as code 2 except high insulating cup 8

25、Same as code 3 except high insulating cup 9 Same as code 6 except high insulating cup NOTE: See Appendix for details of standard and high insulating cups. EIA 479-A 73 3234b00 0506982 706 ElA-479-A Page 4 3.8 Capacitance tolerance shall be identified with a single letter as shown below: Code Letter

26、Capacitance Tolerance E H L f 4% +6% f 3% A Tolerance color code may be requested. This color code will be placed on the cover surface of the capacitor. The color code shall be as shown below: Capacitance Range from Nominal Color Code Code E CodeH Code L Black -4% to -2% -6% to -3% N/A White -2% to

27、o -3% to o -3% to o Yellow o to +2?h Oto +3% oto +3% Red +2to +4% +3% to +6% N/A 3.9 Design options are described in 3.9.1 through 3.9.6. 3.9.1. The protective device shall be identified by the letter “P“. 3.9.1.1 This protective device is intended to prevent case rupture and expulsion of internal m

28、aterial when used within the current and vottage fault rating of this device. 3.9.1.2 A minimum clearance above the capacitor terminals is required for effective operation of the protective device. Manufacturer should be consulted for minimum recommended clearance after installation. 3.9.2 Discharge

29、 resistor shall be identified by the letter “R“ and shall discharge the capacitor to less that 50 volts within 60 seconds after disconnection of the capacitor from the voitage supply. The resistor may be connected either internally or externally at the option of the user. 3.9.3 Ground lug shall be i

30、dentified by the letter “G“. (see Appendix for ground lug details.) 3.9.4 Diode, internally connected, shall be identified by the letter “D“. Characteristics and requirements for the diode shall be specified by the user. 4. 5. 6. 6.1 6.2 EIA 479-A 93 MM 3234b0i3 050bY3 642 EIA-479-A Page 5 APPLICABL

31、E DOCUMENTS The latest revisions of the following standards when specified, form part of this document. (a) EIA Recommended Standard EIA-186-E “Standard Test Methods for Electronic Passive Component Parts - General Instructions and Index of Test Methods“. (b) EIA Source Code and Date Book. (c) NEMA

32、Standard Publication DC2-1976, Residential Controls (Quick-Connect Terminals). (d) British Standard BS5057-1973. EIA Recommended Standards and Publications may be obtained from Global Engineering Documents, 15 Inverness Way East, Englewood, CO 801 12-5704. NEMA Publications may be obtained from the

33、National Electrical Manufacturers Association, 2101 L Street, N.W., Suite 300, Washington D.C. 20037. British Standards Institution documents may be obtained from Publications Manager, 101 Pentonville Road, London NI 9ND, ENGLAND. STANDARD TEST CONDITIONS Standard atmospheric conditions under which

34、tests are to be conducted or referred shall be as shown below unless otherwise specified. Temperature: Barometric Pressure: Relative Humidity: Lower than 75% 15 C to 35 C(referred to 23“ C values) 860 to 1060 mbar 650 to 800 mm of mercury QUALITY ASSURANCE Recommended order of tests shall be as show

35、n in Table 1. No sample shall be subjected to more than one group of tests in Group 2, and Group 3 or Group 4. Number of samples and allowable failures shall be as determined by agreement between the user and the supplier. EIA 479-A 93 3234600 0506384 583 m e EIA-479-A Page 6 TABLE 1 QUAUM ASSURANCE

36、 TEST PROGRAMS (1 00% of Sample) GROUP 1 Mechanical inspection Marking Dielectric Withstand Voltage Capacitance Dissipation Factor Seal Requirements Section 7 Section 8 Section 9 Section 10 Section 11 Section 12 (25% of Sample) GROUP 2 Corona Test Salt Spray Vibration Terminal Strength Section 13 Se

37、ction 15 Section 14 Section 18 (25% of Sample) GROUP 3 Solderability Humidity Test of Protective Device Section 17 Section 19 Section 16 (50% of Sample) GROUP 4 Low Temperature Capacitance Change High Temperature Capacitance Change Accelerated Life Test Section 20 Section 20 Section 21 EIA 479-A 93

38、3234600 0506985 415 H 7. 7.1 7.2 7.3 8. EIA-479-A Page 7 VISUAL AND MECHANICAL EXAMINATION Dimensions shall be within the tolerance allowed. Marking shall be legible, complete and correct. Physical appearance shall be uniform in quality and capacitors shall be free from pits, corrosion, cracks, roug

39、h edges and other defects that will affect life, serviceability or appearance. MARKING Marking shall be permanent ink or metal stamping and shall consist of the following items: Nominal capacitance in microfarads (pF) Rated voltage in volts (rms) Rated frequency in Hz (only if not 50 - 60 Hz) Name o

40、r symbol of manufacturer Manufacturers part number EIA date code identification. Maximum temperature rating O C (where required) Underwriters Laboratories paint identification (where required) Protective device (where required) Non-PCB identification. EIA 479-A 93 = 3234600 0506786 351 EIA-479-A Pag

41、e 8 9. 9.1 9.2 1 o. 11. 12. 12.1 12.2 13. DIELECTRIC WITHSTANDING VOLTAGE TESTS Between terminals - Capacitors shall be capable of withstanding the application of a dc voltage equal to three times rated ac voltage rating for one minute. Capacitors shall be discharged through a 10,O ohm resistor to l

42、imit the current. Terminals to case - Capacitors with standard cup terminal insulators shall be capable of withstanding 10 kV dc for one minute. Capacitors with high cup terminal insulators shall be capable of withstanding 13 kV dc for one minute. CAPACITANCE TEST Capacitance measurement shall be ma

43、de on an ac bridge of 600 Vac 60 Hz voltage applied or shall be referred to such measurement. Values of capacitance measured shall be within the specified tolerance at or referred to a temperature of 23“ C. Accuracy of measurement shall be k 0.5%. DISSIPATION FACTOR TEST Dissipation factor DF of eac

44、h capacitor shall not exceed 0.3% for film-paper dielectric when measured with 600 Vac Hz voltage applied to any temperature between 23“ C and 80“ C. The average DF at 65 C shall not exceed the average DF at 23“ C. SEAL TEST Capacitors shall be capable of withstanding a temperature of IO“ C over rat

45、ed case temperature in circulating air for a 10 minute period past the time the entire capacitor has reached that temperature without evidence of leakage of the impregnant. Capacitors shall be capable of Withstanding two thermal cycles each consisting of 24 hours at -55“ C followed by 24 hours at ro

46、om temperature without evidence of leakage of the impregnant. CORONA TEST Capacitors shall be capable of meeting corona inception voltage (CIV) and corona extinguishing voltage (CEV) requirements using test facilities, procedures and limits agreed to between user and the supplier. EIA 477-A 73 32346

47、00 0506787 298 14. 14.1 14.2 15. 16. 17. 18. 19. 19.1 19.2 EIA-479-A Page 9 VIBRATION TEST Capacitors shall be capable of withstanding the vibration test of EIA Recommended Standard EIA-l6-7E, Type 111 except for thirty minutes per plane without physical or electrical damage. Capacitors shall be tes

48、ted in accordance with Sections 9, 10 and 11 at the completion of 14.1 . SALT SPRAY TEST Painted finished shall be capable of withstanding 500 hours sait spray test per EIA Recommended Standard EIA-186-5E, Type li test, with less that 5% of the case surface showing finish breakdown or case failure w

49、hen rust is removed. Test shall be conducted with 5% salt in the water at a temperature of 35“ C. PROTECTIVE DEVICE Protective device shall meet test requirements as agreed to between the user and the supplier. SOLDERABILITY Solder type terminals shall be easily soldered using tin-lead solders with noncorrosive fluxes and standard soldering techniques. TERMINAL STRENGTH Terminals shall be capable of withstanding 3 inch-pounds-force (3.5 kg-cm) of torque and 50 pounds-force (26.7 kg) of axial compression and puli without damage. Cover shall be supported against deflection d