Quality Identification of Capacitor Components

Capacitive component is a component that stores charge and electrical energy. It can be composed of two metal plates with a conductive layer and an intermediate isolation layer. The middle isolation layer can be made of various materials such as air, paper media, plastic, alumina, etc. The main feature of these materials is good insulation performance.

Capacitive components have some special characteristics, which determine their application in electronic circuits. One of the main functions of capacitive components is to store electric charge. When a capacitive component is in a charged state, charge accumulates in the dielectric between the conductor plates. This allows the capacitive component to release the stored charge when needed.

Zhongke Testing provides quality appraisal services for capacitor components and has judicial appraisal qualifications.

A home appliance company purchased a batch of capacitors as components for refrigerators. However, during use, the capacitance capacity attenuated, resulting in serious returns of the batch of refrigerators, and the home appliance company suffered economic losses. The home appliance company sued the capacitor supply company, demanding compensation for its economic losses. Therefore, the court entrusted our company to identify whether the batch of capacitors complied with relevant standards. The
expert team conducted quality analysis on this batch of capacitors in accordance with national standards. After testing, they came to the following conclusion: During normal use, the insulation resistance between the capacitor electrodes decreases, resulting in local dielectric breakdown of the internal metallized film. The breakdown of this metallized film is the main reason for the decrease in capacitor capacity.

GB/T 2693-2001 IEC 60384-1:2016 Fixed capacitors for electronic equipment Part 1: General specification
GB/T 6346.14-2015 IEC 60384-14:2016 Fixed capacitors for electronic equipment Part 14: Sub-specification Fixed capacitors for suppressing electromagnetic interference from power supplies
GB/T 3667.1-2016 IEC 60252-1: 2013 AC motor capacitors Part 1: General - Performance, testing and ratings - Safety requirements - Installation and operation guidelines
GB/T 18489-2008 IEC 61048:2006 General requirements and safety requirements for capacitors for tubular fluorescent lamps and other discharge lamp circuits
GB/T 4787-2010 IEC 62146-1:2016 Voltage equalizing capacitors for high-voltage AC circuit breakers
JB/T 8168-1999 Pulse capacitors and DC capacitors
JB/T 7112-2000 Assembled high voltage shunt capacitor
GB/T 17886.1-1999 IEC 60931-1: 1996 Non-self-healing shunt capacitors for AC power systems with nominal voltage 1kV and below Part 1: General principles - Performance, testing and ratings - Safety requirements - Installation and operation guidelines
GB/T 11024.1-2019 IEC 60871-1: 2014 Parallel capacitors for AC power systems with nominal voltage above 1000V Part 1: General provisions
GB/T 6115.1-2008 IEC 60143-1: 2015 Series capacitors for power systems Part 1: General provisions
0GB/T 3984.1-2004 IEC 60110-1:1998 Power capacitors for induction heating devices Part 1: General provisions
1GB/T 12747.1-2017 IEC 60831-1:2014 Self-healing shunt capacitors for AC power systems with a nominal voltage of 1000V and below Part 1: General provisions Performance, test and rating safety requirements Installation and operating guidelines
2GB/T 3667.1-2016 IEC 60252-1:2010+AMD1:2013 AC motor capacitors Part 1: General - Performance, testing and ratings - Safety requirements - Installation and operating guidelines
3GB/T 17702-2013 IEC 61071:2017 Power electronic capacitors
4GB/T 9324-1996 Fixed capacitors for electronic equipment Part 10: Sub-specification: Multilayer chip ceramic capacitors
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