bare copper tape

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Cords and standards

  • GB/T 5585-2005


  • One circuit,Large current phase line
  • null line and ground wire,bus duct
  • Motor winding,high-voltage or low-voltage electrical apparatus
  • breaker contact,guide line for power installation
  • Connection for power distribution cabinet
  • metal smelting,Electrochemical plating,Chemical caustic soda,and other current electrolytic refining engineering


Product Description

  • Made from high purity copper
  • Used for large current delivery
  • Two types TMY - hard state and TMR - soft state

Detailed descriptions:

Bare copper tap

Bare copper tap is also called copper bulbar, is made from super and high pure copper , and the cross section often is rectangle or rounded rectangle whose main application :delivering current and connecting electrical equipment.

Bare copper tape is mainly used in a circuit, for example , the place with large current :zero line, earth line, phase line with large current. The most important parameter for bare copper tape is current-carrying capacity, we choose proper bare copper tape according to different current. And the connection part of bare copper tape must strong enough to avoid the heating caused by large current burn off the bare copper tape. Because the conductive performance of copper is better than aluminum, so bare copper tape is widely use in electrical equipments and distribution equipments.

There are two models about bare copper tape and copper busbar :TMY and TMR;Hard TMY and Soft TMR.

Copper busbar is requisite contact wire for winding used manufacturing electrical machine ,power equipment ,breaker cntact ,other contact wires for distribution installation.

The technical performance for copper busbar:

The tensile strength of soft copper busbar is more than 206N/mm 2,and the elongation is larger than 35%.

The resistivity and resistance-temperature for copper busbar as the chart shows


型号 +20℃时电阻率 ≤(Ωmm 2 /m) 电阻温度系数(1/℃)
TMR 0.017241 0.00393
TMY 0.01777 0.00381

When the thickness of filet around the copper busbar is below 6.3mm, and the fillet radius is less than 1.5mm ,and if the thickness is above 7.1mm, and the fillet radius is smaller tan 2mm.

The bending straightness of hard copper busbar is less than 4mm/meter.

Size and allow deviation as table shows:


厚度a 允许偏差(mm) 厚度b
B≤50.00 50.00<b≤100.00 100.00<b≤200.00 200.00<b
a≤2.8 ±0.03 ---- ---- ---- a≤25.00 ±0.13
2.8<a≤4.75 ±0.05 ±0.08 ---- ---- 25.00<b≤35.00 ±0.15
4.75<a≤12.50 ±0.07 ±0.09 ±0.12 ±0.30 35.00<b≤100.00 ±0.30
12.50<a≤25.00 ±0.10 ±0.11 ±0.13 ±0.30 100.00<b ±0.3%b
25.00<a ±0.15 ±0.15 ±0.15 ---- ---- ----




导体规格mm 重量kg/m 标准长度m/卷
20*3 0.63 50
25*3 0.77 50
50*3 1.52 40


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