EOW March 2014

Technical article

An acid resistant test revealed excellent results. In addition, other tests revealed satisfactory results. This halogen-free cable for photo- voltaic power generation is excellent in conforming to the TÜV and JCS standards. 5 Conclusions At this time, Furukawa has succeeded in developing a cable which has excellent high-temperature heat resistance, heat deterioration properties and incombustibility, and which conforms to the TÜV standards and the JCS standards, without using an electron-beam bridging machine. In the future, this product will be introduced to each manufacturer through PR activities, deploying this technology and promoting non-electron beam irradiation in the field of electron-beam irradiation. n The paper is courtesy of the 61 st IWCS International Cable and Connectivity Symposium, Providence, Rhode Island, USA, November 2012.

Developed wire

Sample A

▲ ▲ Figure 2 : Bleed characteristics

Test

Required

Developed wire

INSULATION Mechanical properties Before aging Tensile strength (MPa) Elongation (%)

20.4 357

6.5< 125<

After aging (aged at 150º for 240 hours) Tensile strength (per cent of unaged values) Elongation (per cent of unaged values)

104

70<

92

70<

JACKET Mechanical properties Before aging Tensile strength (MPa) Elongation (%)

14.8 22.4

8.0< 125<

After aging (aged at 150º for 240 hours) Tensile strength (per cent of unaged values) Elongation (per cent of unaged values) Resistance against acid solution Tensile strength (per cent of unaged values) Elongation Resistance against alkaline solution Tensile strength (per cent of unaged values)

114

70<

6 References

86

70<

TÜV 2Pfg1169/2007 Standard

[1]

JCS4517

[2]

UL4703 standards

[3]

114 217

70~130 100<

115 217

70~130 >100

CABLE Bending test at -40ºC Impact test at -40ºC

No cracks No cracks

No cracks No cracks

▲ ▲ Table 4 : Primary properties of developed cable

These results represent the observations of the surface of an electric wire that was observed a half-year after a cable was manufactured. Since this cable requires a very high level of heat deterioration properties, the addition of very many antioxidants is needed, and there are concerns about the occurrence of bleed. When a bleed occurs, there are concerns about the transition of the bleed to the connections. It was verified that as for Sample A (conventional polyolefin materials), anti- oxidants were bleeding at an ordinary temperature.

On the other hand, it was verified that any bleed had not been found in this newly developed product. 4.5 General Characteristics Compatible with TÜV and JCS Standards Table 4 shows the results of evaluating a part of any other general, physical properties of this cable, which conform to the TÜV and JCS standards. There are concerns about the cold resistance and acid resistance of a flame-retardant cable for which polyolefin is used. However, cracks did not occur even when a test was performed at a temperature of −40ºC.

Fitel Photonics Laboratory Furukawa Electric Co Ltd 6 Yawatakaigan-dori Ichihara Chiba Japan Tel : +81 436 42 1717 Email : matsumura.arifumi@furukawa.co.jp Website : www.furukawa.co.jp

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March 2014