If you leave the wires and cables, I am afraid that your food, clothing, housing and transportation will have problems. It can be seen that the role of wire and cable is very powerful now ! In recent years, the rapid development of China’s economy has greatly promoted the expansion of the wire and cable industry. The large market demand has resulted in the rampant rampage of counterfeit and shoddy products, resulting in many personal and property safety accidents. In order to improve the quality of wire and cable products, ensure the safe operation of the power system, and accelerate the steady development of the national economy, it is necessary to have comprehensive testing items and scientific testing methods.
Meanwhile, In accordance with the relevant provisions of the building electrical engineering construction quality acceptance specification, All raw materials, finished products, semi-finished products, equipment, etc. used in construction and installation projects must be carefully and carefully inspected when entering the site, and relevant records must be filled in before they can be used in construction. The cable flammability test and electrical power cord flex bending test has always been an important part of the national standard wire and cable. The more advanced the quality inspection department within a wire and cable company, the better and more trustworthy the wire and cable produced by the company. The stricter the third-party quality inspection department, the more conducive to the development of this industry.
|ASTM D4329-21||Standard Practice for Fluorescent Ultraviolet (UV) Lamp Apparatus Exposure of Plastics||Ultraviolet Test Equipment|
|IEC 60227-2||Polyvinyl chloride insulated cables of rated voltages up to and including 450/750 V – Part 2: Test methods||Flexing Test Machine|
|BS IEC 60695-10-2 IEC 60695||Fire Hazard Testing ~ Part 10: Guidance and test methods for the minimization of the effects of abnormal heat on electrotechnical products involved in fires｜Section 2: Method for testing products made from non-metallic material for resistance to heat using the ball pressure test||Glow Wire Test Apparatus|
|IEC 60068-2-32||Basic environmental testing procedures Part 2: Test- Test Ed: Free fall||Tumble Tester|
|ASTM F2357-10||Standard Test Method for Determining the Abrasion Resistance of Inks and Coatings on Membrane Switches Using the Norman Tool “RCA” Abrader||RCA Abrasion Wear Tester|
|IEC 60228||Conductors of insulated cables｜Cable Flammability Test and Electrical Power Cord Flex Bending Test Machine from Wewon Environmental Chambers Co., Ltd.｜Power Cord Flex Test Equipment from China Supplier Manufacturer||Accelerated Weathering Test Standards|
|CEI IEC 60245-2||Rubber insulated cables – Rated voltages up to and including 450/750 V – Part 2: Test methods||Flexible Cables Testing|
|IEC 60320-1||Appliance couplers for household and similar general purposes – Part 1: General requirements||Steam Aging Tester|
|IEC 60335-2-23||Household and Similar Electrical Appliances – Safety – Part 2-23: Particular Requirements For Appliances For Skin Or Hair Care||Horizontal Vertical Flame Test Chamber|
|IEC 60598-1||Luminaires – Part 1: General requirements and tests||IP65 Waterproof Test|
|IEC 60884-1||Plugs and socket-outlets for household and similar purposes – Part 1: General requirements||Temperature Rise Test|
|BS EN IEC 62133||Secondary cells and batteries containing alkaline or other non-acid electrolytes｜Safety requirements for portable sealed secondary cells, and for batteries made from them, for use in portable applications||Short Circuit Test Chamber|
|ISO 2248||Packaging – Complete, filled transport packages – Vertical impact test by dropping||Drop Test Machine|
|ISO 2759||ISO 2759 Board – Determination of bursting strength||Bursting Strength Tester|
|ISO 4892-3||Plastics – Methods of exposure to laboratory light sources｜Part 3: Fluorescent UV lamps||Accelerated Weathering Test Standards|
Important Indicators of Cable Flammability Test and Electrical Power Cord Flex Bending Test｜What Is the Most Critical Indicator to Measure the Quality Of Wire and Cable? How to Conduct Quality Screening For Wire and Cable ?
1 Measurement of wire DC Resistance: The conductive core of the wire and cable mainly transmits electrical energy or electrical signals. The resistance of the wire is the main indicator of its electrical performance. The core resistance of the wire is larger than that of the DC voltage due to the skin effect and the proximity effect surface when the AC voltage is applied, but the difference between the two is very small when the electric eye frequency is 50Hz.
Now the standard stipulates that it can only be required to detect whether the DC resistance or resistivity of the wire core exceeds the value specified in the standard. Some defects in the production process can be found through flammability tests for electrical cables: such as wire breakage or part of the single wire breakage; wire cross-section is not up to standard; product length is incorrect, etc.
2 Test of Insulation Resistance : Insulation resistance is an important indicator reflecting the insulation characteristics of wire and cable products. Flammability tests for electrical cables and insulation resistance test are closely related to the electrical strength of the product, dielectric loss, and the gradual deterioration of insulating materials under working conditions.
For communication cables, if the insulation resistance between lines is too low, it will also increase loop attenuation, crosstalk between loops, and long-distance power supply leakage on the conductive core. Therefore, the insulation resistance should be higher than the specified value.
|ISO 11507||Paints and varnishes ~ Exposure of coatings to artificial weathering｜Exposure to fluorescent UV lamps and water||Accelerated Weathering Tester|
|UL 13||UL13 Standard for Safety Power-Limited Circuit Cables||Horizontal Vertical Flame Chamber|
|UL 62||UL Standard for Safety for Flexible Cords and Cables, UL 62||Cable Flammability Test|
|UL 310||UL Standard for Safety for Electrical Quick-Connect Terminals, UL 310||Cable Flammability Test|
|UL 444||UL Standard for Safety for Communications Cables, UL 444||Flammability Chamber|
|UL 498||UL Standard for Safety for Attachment Plugs and Receptacles, UL 498||Electrical Power Cord Flex Bending Test|
|UL 510||UL Standard for Safety for Polyvinyl Chloride, Polyethylene, and Rubber Insulating Tape, UL 510||Horizontal Flame Chamber|
|UL 697||UL Standard for Safety for Toy Transformers, UL 697||Electrical Power Cord Flex Bending Test|
|UL 746A||Standard for Safety｜Polymeric Materials – Short Term Property Evaluations||Electrical Power Cord Flex Bending Test|
|UL 1581||Standard for Safety｜Reference Standard for Electrical Wires, Cables,and Flexible Cords||VW-1 Flame Test|
|UL 1642||UL Standard for Safety for Lithium Batteries, UL 1642||Gravity Impact Tester|
|UL 2054||UL Standard for Safety for Household and Commercial Batteries, UL 2054||Environmental Chambers Testing Standards|
|DIN 40050-9 CN||Cables of rated voltage up to and including 450/750 V and having thermoplastic insulation｜Part 14: Flexible cables (cords), insulated and sheathed with halogen-free thermoplastic compounds (Chinese Version)||Standard Operating Procedure (SOP) and Standard Test Method (STM) for IP X9K Test|
|DIN 40050-9||Cables of rated voltage up to and including 450/750 V and having thermoplastic insulation｜Part 14: Flexible cables (cords), insulated and sheathed with halogen-free thermoplastic compounds||IP X7 X8 Pressurized Immersion Test, Simulate 30 Meters Water Pressure|
|DIN VDE 0281-14||Cables of rated voltage up to and including 450/750 V and having thermoplastic insulation｜Part 14: Flexible cables (cords), insulated and sheathed with halogen-free thermoplastic compounds; German version HD 21.14 S1:2003||Cable Flammability Test and Electrical Power Cord Flex Bending Test|
3 Measurement of Capacitance and Dissipation Factor: When AC voltage is applied to the cable, current flows through it. When the amplitude and frequency of the voltage are constant, the magnitude of the capacitor current is proportional to the capacitance of the cable. For ultra-high voltage cables, the current of this capacitor may reach a value comparable to the rated current, which becomes an important factor limiting the cable capacity and transmission distance. So the capacitance of the cable is also one of the main electrical performance parameters of the cable.
Through the measurement of capacitance and dissipation factor, various insulation deterioration phenomena such as insulation damping, insulation layer and shielding layer falling off can be found. Therefore, capacitance and power code flex tests are carried out in both cable manufacturing and cable operation.
4 Dielectric Strength Test: The dielectric strength of wires and cables refers to the ability of the insulating structure and insulating materials to withstand the action of an electric field without breakdown damage. Make wire and cable certification testing To ensure the safe operation of the product, all insulation types of wire and cable are generally subject to dielectric strength testing.
Dielectric strength test can be divided into withstand voltage test and breakdown test. The voltage for a long time is generally higher than the rated working voltage of the test product. The specific voltage value and withstand voltage time are stipulated in the wire and cable standards. Through the withstand voltage test, you can test the reliability of the product running under the working voltage, find serious defects in the insulation, and also find some shortcomings in the production process.
|DIN VDE 0295||Conductors of cables, wires and flexible cords for power installaion||Cable Flammability Test|
|DIN VDE 0472||Testing of cables, wires and flexible cords; dielectric strength on cables, wires and cords for telecommunication systems||Bending Test Machine|
|DIN VDE 0620-1||Plugs and socket-outlets for household and similar purposes｜Part 1: General requirements||Glow Wire Test Apparatus|
|JIS A 5430||JIS A 5430: 2004 (SKC/JSA) Fiber reinforced cement boards||Drop Weight Impact Tester|
|JIS C 0044||JIS C 0044 (IEC 68- 2 -32: 1975) Environmental testing Part 2 : Tests. Test Ed : Free fall||Tumble Test Machine|
|JIS C 8306||Testing methods for wiring devices JIS C 8306- 1996 Translated and Published by Japanese Standards Association||Cable Flammability Test|
|JIS K 6745||JIS K 6745: 2008 (JPSA/JPIF/JSA) Plastics-Unplasticized poly (vinyl chloride) sheets||Falling Weight Impact Tester|
|JIS Z 0202||Japanese Industrial Standard Method Of Drop Test For Packaged Freights||Drop Test Machine|
|SAE J2020-2003||Accelerated Exposure of Automotive Exterior Materials Using a Fluorescent UV and Condensation Apparatus||Drop Test Machine|
|TAPPI T 804 OM-2010||Compression test of fiberboard shipping containers||Box Compression Tester|
|BS 1363-1||13 A plugs, socket-outlets, adaptorsand connection units ｜Part 1: Specification for rewirable andnon-rewirable 13 A fused plugs||Tumble Tester|
|BS EN 1288-1||Glass in building ~ Determination of thebending strength of glass｜Part 1: Fundamentals of testing glass||Electrodynamic Shaker System|
|BS EN ISO 6158||Metallic coatings ~ Electrodeposited coatings of chromiumfor engineering purposes||Cable Flammability Test|
|IEC 62281||Safety of primary and secondary lithium cells and batteries during transport||Electrodynamic Shaker System|
|ISO 7800||Metallic materials – Wire -Simpletorsion test||Drop Weight Tear Tester|
|UL 94||Tests for Flammability of Plastic Materials for Partsin Devices and Appliances||Ultrasonic Flaw Detector|
|JIS C 3005||Test methods for rubber or plastic insulated wires and cables||Cord Winding Crack Tester|
5 Aging and Stability Test: The aging test is a stability test that can maintain stable performance under the action of stress (mechanical, electrical, thermal). The simple thermal aging test is to test the aging characteristics of the sample under the action of heat. Put the sample in an environment with a temperature higher than the rated working temperature, so that at a higher temperature T, a shorter life can be obtained.
6 Thermal Stability Test: The thermal stability test is that the cable is heated by current and also bears a certain voltage. After a certain period of heating, some sensitive performance parameters are measured to evaluate the stability of the insulation. Insulation stability test is divided into long-term stability test or short-term accelerated aging test. Wire and cables are wire products used to transmit electrical (magnetic) energy, information and realize electromagnetic energy conversion. The generalized wire and cable is also referred to as the cable. The cable in the narrow sense refers to the insulated cable, which can be defined as: an aggregate consisting of the following parts; One or more insulated cores, and their respective possible wraps, overall and outer sheaths, and cables may also have additional uninsulated conductors.
In recent years, with the rapid development of many country’s economy, electrical fires have shown a high trend. In view of the danger of wire and cable fire, the country has formulated standards for flame-retardant, fire-resistant wire and cable. Electrical power cord flex bending test provides guidance for the production and selection of materials for enterprises, builders, constructors, etc.