Oxygen-free Copper Bus Bar_Shaoxing Libo Group Co., Ltd.

Oxygen-free copper bus bar is an indispensible conductor material for high and low-voltage switchgears, transmission and distribution equipment, large-scale motors, and other electrical apparatus.

Our oxygen-free copper bus bar begins with high-purity copper rod, and is one-time molded with continuous conforming technology. Our products have a high copper content (no less than 99.96%) and low oxygen content (no greater than 10 ppm). Our bus bar is available at any length with high consistency, low resistivity, smooth surface and uniformity..

1. Model

WTMR(Soft)，WTMY(Hard)

Executive Standards：GB/T5585.1-2005

2.Main Technique Data：

2.1 Size Options：

WTMY(hard)

Bus bar’s width ：10mm～250mm

Bus bar’s thickness scope：2mm~50mm

WTMR(soft)

Bus bar’s width：10mm~ 80mm

Bus bar’s thickness：2mm~ 80mm

2.2 Chemical Composition and Oxygen Content

Table 1

Chemical Composition and Oxygen Content of Copper Rod (Chemical Composition %, the content of microelement is less than or equal to)

2mm～80mmBus bar’s width scope：10mm～80mm2mm～50mm

Cu+Ag	P	Bi	Sb	As	Fe	Ni	Pb	Sn	S	Zn	O
≥99.97	0.001	0.001	0.002	0.002	0.005	0.002	0.003	0.002	0.002	0.002	0.001

2.3 Size and Tolerance

Table 2

Tolerance for the Thickness of Bus bar Unit：mm

Thickness a	Width b
Thickness a	b≤50.00	50.00<b≤100.00	100.00<b≤200.00	200.00<b
a≤2.80	±0.03	—	—	—
2.80<a≤4.75	±0.05	±0.08	—	—
4.75<a≤12.50	±0.07	±0.09	±0.12	±0.30
12.50<a≤25.00	±0.10	±0.11	±0.13	±0.30
25.00<a	±0.15	±0.15	±0.15	—

Table3

Tolerance for the Thickness of Bus bar Unit：mm

Width b	Tolerance
b≤25.00	±0.13
25.00<b≤35.50	±0.15
35.50<b≤100.00	±0.30
100.00<b	±0.3% b

2.4 Fillet and Circle-side radius

When a≤6.30m, there could be a fillet which the radius ≤1.5mm; when a≥6.70mm, there could be a fillet which the radius ≤2.0mm, it can meet customers’ specific needs.

2.5 Flatness

The narrow edge straightness of the bus bar in hardness (within 1 m length) shall not exceed the figures in the table. The wide edge straightness of the bus bar in hardness (within 1 m length) shall not exceed 5mm.

Table 4

Narrow edge flatness of copper bus bar Unit：mm

Bus bar	Flatness
2.80<a≤16.00: 50.00<a≤150.00	2
Other Specification	4

2.6Mechanical Performance

Bus bar’s tensile Strength, elongation and hardness shall follow the figures in the table. The wide edge of bus bar bended 90°, while there is no cracks on the surface.

Table 5

Tensile Strength, Elongation and Hardness

Model	Bus bar
Model	Tensile Strength/MPa	Elongation/%	Brinell Hardness/HB
WTMR	≥206	≥35	—
WTMY	In accordance with the customer requirement	In accordance with the customer requirement	In accordance with the customer requirement

2.7 Electrical Performance

Table 6

Resistivity (20℃)

Model	DC Resistivity(Ω·mm²/m)	Conductivity(%IACS)
WTMR	≤0.017241	≥100
WTMY	≤0.01777	≥97

2.8Surface Quality

The surface of bus bar is bright and leveled, and there are no defects causing disproportion as a good industrial product. There are no fins, burrs and cracks on the fillet & circle-side of bus bar.