Cord Winding Crack Tester for Wire and Cable Test

The cord winding crack tester is used to determine the bending performance of wires and cables at low temperatures. It is suitable for round wire and cable with outer diameter ≤12.5mm or round insulated core, and flat wire and cable with size ≤20mm or fan-shaped insulated core that cannot be made into dumbbells. The machine is an indispensable instrument in the wire and cable industry for the bending function test of products. The test standards be used for cord winding crack machine include: IEC 60811-1-4 JIS C 3005 2014 ISO 6722-1 ISO 6722 -2

Test Mothod for Cord Winding Crack Tester: The machine is specialized in testing the impact and bending of the variable wires under low-temperature condition. If the cross -sectional area of than 100mm², then specimen must be put into testing chamber for freezing for one hour, after that immediately rolls specimen aro specified rod in a uniform speed. Otherwise, for the cross – sectional area over 100mm², roll the specimen before hand and put in freezing one hour. Afterwards, immediately roll specimen around the rod in reverse direction. Finally, take out of specimen for check its surface has crack or fissure or not.

The cord winding crack tester produced by Wewon Tech is suitable for the bending performance test of power distribution and communication cables and optical cables, including the material changes of the polymer insulation and protective sheath materials of marine and offshore cables and optical cables after bending at different temperatures. The test standards frequently used by customers are: ISO 6722-1 and ISO 6722-2. ISO 6722 has two parts, Part 1 is the size, test methods and requirements of copper conductor wires, and Part 2 is the size, test methods and requirements of aluminum conductor wires. Page Source:

Cord Winding Crack Tester

Model DescriptionWEW-XL-010WEW-XL-100
Test Room (mm)400×500×5001000×1000×1000
Dimensions (mm)1030×1020×14701610×1560×1960
Temperature Range-40°C (C type) ︱-70°C (E type)
Volatility Uniformity≤±0.5℃︱≤2℃
Temperature Rise0.7~1℃/min (3℃/min, 5℃/min, 10℃/min)
Insulation MaterialsGlass Fiber Cotton ︱Rigid Polyurethane Foam
Cooler SystemMulti-stage Diaphragm Evaporator
Air CirculationSingle circulation, extended shaft, stainless steel centrifugal fan blades
Cooling MethodUnit Cooling Method︱Dual (cascade) Cooling Method
CompressorFrench “Tecumseh” fully enclosed refrigeration compressor
ControllerJapan “Fuji” ︱ Honeywell, USA
Sensor TypePT100 Platinum Resistance
Security DeviceLeakage protection, over-temperature protection, fast fuse, compressor over-voltage protection
Standard ConfigurationInternally heated hollow glass observation window: one 250×300 (mm), One test hole φ50mm, Two sample holders, One lighting lamp
Power Supply220V 50Hz︱380V 50Hz

ISO 6722-1 Road Vehicles 60V and 600V Single-Core Cables, Part 1: Dimensions, test methods and requirements for copper conductor cables. ISO 6722-1: 2011 Main Test Content Include:

1 Outside Cable Diameter (ISO 6722-1 Section 5.1)2 Insulation Thickness (ISO 6722-1 Section 5.2)
3 Conductor Diameter4 Conductor Resistance
5 Withstand Voltage6 Insulation Faults
7 Insulation Volume Resistivity8 Pressure test at High Temperature
9 Strip Force10 Low Temperature Winding
11 Cold Impact12 Sandpaper Abrasion
13 Scrape Abrasion14 Long-term Ageing, 3000 Hours
15 Short-term Ageing, 240 Hours16 Thermal Overload
17 Shrinkage by Heat18 Fluid Compatibility (ISO 6722-1 Section 5.17)
19 Durability of Cable Marking20 Resistance to Ozone (ISO 6722-1 Section 5.19)
21 Resistance to Hot Water22 Temperature and Humidity Cycling
23 Resistance to Flame Propagation.

ISO 1817 Rubber, Vulcanized or Thermoplastic –Determination of the Effect of LiquidsISO 6722-1 Reference Standards
ISO 6931-1 Stainless Steels for Springs –Part 1: Wire
IEC 60811-2-1 Common Test Methods for Insulating and Sheathing Materials of Electric and Optical Cables Part 2-1: Methods Specific to Elastomeric Compounds –Ozone Resistance, Hot Set and Mineral Oil Immersion Tests
ASTM B1 Standard Specification for Hard Drawn Copper Wire
ASTM B3 Standard Specification for Soft or Annealed Copper Wire
ASTM B33 Standard Specification for Tin Coated Soft or Annealed Copper Wire for Electrical Purposes
ASTM B298 Standard Specification for Silver Coated Soft or Annealed Copper Wire
ASTM B355 Standard Specification for Nickel Coated Soft or Annealed Copper Wire
EN 13602 Copper and copper alloys –Drawn, round copper wire for the manufacture of electrical Conductor

ISO 6722 -2 Road Vehicles 60V and 600V Single-Core Cables, Part 2: Dimensions, test methods and requirements for aluminium conductor cables. ISO 6722-2: 2013 Main Test Content Include:

1 Outside Cable Diameter (ISO 6722-2 Section 5.1)2 Insulation Thickness (ISO 6722-2 Section 5.2)
3 Conductor Diameter4 Cross-Sectional Area (ISO 6722-2 Section 5.3.2 Method 2)
5 Conductor Resistance6 Withstand Voltage
7 Insulation Faults8 Insulation Volume Resistivity
9 Pressure Test at High Temperature10 Strip Force
11 Low Temperature Winding12 Cold Impact
13 Sandpaper Abrasion14 Scrape Abrasion
15 Long-Term Ageing, 3000 Hours16 Short-Term Ageing, 240 Hours
17 Thermal Overload18 Shrinkage by Heat
19 Fluid Compatibility (ISO 6722-2 Section 5.17)20 Durability of Cable Marking
21 Resistance to Ozone (ISO 6722-2 Section 5.19)22 Resistance to Hot Water

ISO 6722-1 Road Vehicles –60V and 600V Single-Core Cables –Part 1: Dimensions, Test Methods and Requirements for Copper Conductor CablesISO 6722-2 Reference Standards
ISO 6892-1 Metallic Materials –Tensile Testing –Part 1: Method of Test at Room Temperature
EN 573-1 Aluminium and Aluminium Alloys –Chemical Composition and Form of Wrought Products –Part 1: Numerical Designation System
EN 573-3:2009 Aluminium and Aluminium Alloys –Chemical Composition and Form of Wrought Products –Part 3: Chemical Composition and Form of Products

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