GB/T 17702-2021Capacitors for power electronics (English PDF)

Foreword

This document is in accordance with GB/T 1.1-2020 "Guidelines for Standardization Part 1.Structure and Drafting Rules of Standardization Documents".

To be drafted.

This document replaces GB/T 17702-2013 "Power Electronic Capacitors", compared with GB/T 17702-2013, except for structural adjustment and compilation

In addition to the editorial changes, the main technical changes are as follows.

---Modified the content of the scope (see Chapter 1, Chapter 1 of the.2013 edition);

---Updated normative reference documents (see Chapter 2, Chapter 2 of the.2013 edition);

---Added the terms and definitions of "safety protection", "thermal balance", "thermal time constant" and "hot spot temperature" (see Chapter 3);

--- Deleted the time regulation in the impulse discharge test (see 5.9 in the.2013 edition);

---Further clarified the requirements for cooling temperature in the thermal stability test and measurement procedure, and aimed at pure AC capacitors with a single frequency

The maximum reactive power is specified (see 5.10.2, 5.10.2 in the.2013 edition);

---Modified the test voltage value of the AC capacitor in the self-healing test, 1.5UN was revised to 2.15UN (see 5.11, 5.11 in the.2013 edition);

---Added the relevant provisions of the thermal balance and interruption voltage in the durability test, and clarified the "Final measurement of the ambient temperature and the initial measurement

The deviation of the ambient temperature record of the quantity should be within +/-2 degrees C" (see 5.15, 5.15 of the.2013 edition);

--- In the criterion of the destruction test, amend "Self-healing capacitors of isolated design or special non-isolated design" to "use fused isolation

Self-healing capacitors designed to be separated" (see 5.16.2, 5.16.2 in the.2013 edition).

The translation method used in this document is equivalent to IEC 61071.2017 "Power Electronic Capacitors".

The Chinese documents that have consistent correspondence with the normatively cited international documents in this document are as follows.

---GB/T 2423.3-2016 Environmental Test Part 2.Test Method Test Cab. Constant Humidity Test (IEC 60068-

2-78.2012, IDT);

---GB/T 2423.10-2019 Environmental Test Part 2.Test Method Test Fc. Vibration (Sine) (IEC 60068-2-

6.2007, IDT);

---GB/T 2423.22-2012 Environmental Test Part 2.Test Method Test N. Temperature Change (IEC 60068-2-14.

2009, IDT);

---GB/T 2423.28-2005 Environmental testing of electrical and electronic products Part 2.Test method Test T. Soldering

(IEC 60068-2-20.1979, IDT);

---GB/T 2423.60-2008 Environmental testing of electrical and electronic products Part 2.Test method Test U. Lead and integral

Strength of body mounting parts (IEC 60068-2-21.2006, IDT);

---GB/T 5169.11-2017 Fire hazard test for electric and electronic products Part 11.Glow wire/hot wire basic test method

Glow wire flammability test method (GWEPT) of finished products (IEC 60695-2-11.2014, IDT);

---GB/T 5169.12-2013 Fire hazard test of electric and electronic products Part 12.Glow wire/hot wire basic test method

Glow-wire flammability index (GWFI) test method of materials (IEC 60695-2-12.2010, IDT);

---GB/T 13539.1-2015 Low-voltage fuses Part 1.Basic requirements (IEC 60269-1.2009, IDT);

---GB/T 14048.1-2012 Low-voltage switchgear and control equipment Part 1.General (IEC 60947-1.2011,

MOD);

---GB/T 16935.1-2008 Insulation coordination of equipment in low-voltage systems Part 1.Principles, requirements and tests (IEC 60664-

1.2007, IDT).

This document has made the following editorial changes.

- "2.5UN" error in 5.11, it should be "2.5UN or 2.5UNDC", this document is revised to "2.5UN or 2.5UNDC";

---5.15.2 "UN" is wrong, it should be "UN or UNDC", this document is revised to "UN or UNDC";

---5.15.5, "+/-2?" is wrong, it should be "+/-2 degrees C", this document is revised to "+/-2 degrees C";

--- "UN" in Table 5 of Chapter 6 is wrong, it should be "UN or UNDC", this document is revised to "UN or UNDC".

1 Scope

This document applies to capacitors for power electronics applications.

The operating frequency of the system using these capacitors is usually lower than 15kHz, and the pulse frequency may reach 5 times the operating frequency~

10 times.

This document divides capacitors installed as components in the case into AC capacitors and DC capacitors.

This document covers a wide range of capacitor technologies and their multiple applications, such as. overvoltage protection, DC and filtering, switching circuits, energy storage

And auxiliary converter, etc.

This document does not apply to.

---Capacitors for induction heating devices operating at frequencies below 50kHz (see IEC 60110-1 and IEC 60110-2);

---Capacitors for motors and similar applications (see IEC 60252-1 and IEC 60252-2);

---Capacitors used in the circuit to block one or more harmonics in the power grid;

---Small AC capacitors for fluorescent lamps and discharge lamps (see IEC 61048 and IEC 61049);

---Capacitors for suppressing radio interference (see IEC 60384-14);

---Shunt capacitors for AC power systems with a nominal voltage above 1000V (see IEC 60871-1 and IEC TS60871-2);

--- Self-healing shunt capacitors for AC power systems with a nominal voltage of 1000V and below (see IEC 60831-1 and IEC 60831-2);

---Non-self-healing shunt capacitors for AC power systems with a nominal voltage of 1000V and below (see IEC 60931-1 and

IEC 60931-2);

---Electronic capacitors not used in power circuits;

---Series capacitors for power systems (see IEC 60143);

---Coupling capacitor and capacitive voltage divider (see IEC 60358-1);

--- Microwave oven capacitors (see IEC 61270-1);

---Capacitors for rail transit [see IEC 61881 (all parts)].

Application examples are given in 9.1.

2 Normative references

The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations

Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to

This document.

IEC 60068-2-6 Environmental Testing Part 2-6.Test Test Fc. Vibration (Sine) (Environmentaltesting-Part

2-6.Tests-TestFc.Vibration(sinusoidal)]

IEC 60068-2-14 Environmental Testing Part 2-14.Test Test N. Temperature Change (Environmentaltesting-Part

2-14.Tests-TestN.Changeoftemperature)

IEC 60068-2-20 Environmental Testing Part 2-20.Test Test T. Solderability and resistance to soldering heat of components with leads

Test methods (Environmentaltesting-Part 2-20.Tests-TestT.Testmethodsforsolderabilityandresist-

ancetosolderingheatofdeviceswithleads)

IEC 60068-2-21 Environmental Test Part 2-21.Test Test U. Strength of Leading Ends and Overall Mounting Parts