Solid Bushbar – VISION EXIM . Engineering Supply Chain Solutions!

SOLID BUSBAR

Aluminium	EC, 6101
Copper	Cu-ETP
CCA	Copper Clad Aluminium or Bimetal (Aluminium core with outer layer of Copper)
Finish	Bare / Electro Plated (Tin, Nickle, Silver)

Properties of Busbar Materials

Property	Units	Copper		CCA	Aluminium
Property	Units	Annealed	Half Hard	15% Cu	EC	E91E/6101
Min. ultimate tensile strength	MN/m²	217	235-300	130-170	60-85	200
Modus of elasticity	MN/m²	95 X 10³	120 X 10³	85 X 10³	69 X 10³	65 X 10³
Density at 20 ℃	kg/m³	8.89 X 10³	8.89 X 10³	3.63 X 10³	2.7 X 10³	2.7 X 10³
Max. electrical resistivity at 20℃	Ωm	1.724 X 10⁻⁸	1.777 X 10⁻⁸	2.65 X 10⁻⁸	2.826 X 10⁻⁸	3.133 X 10⁻⁸
Min. electrical conductivity at 20℃	1/Ωm	58 X 10⁶	56 X 10⁶	37.7 X 10⁶	35.4 X 10⁶	31.9 X 10⁶
Min. electrical conductivity at 20℃	%IACS	100	97	65	61	55
Temp. coefficient of resistance at 20℃	1/℃	3.93 X 10⁻³	3.93 X 10⁻³	4.01 X 10⁻³	4.03 X 10⁻³	3.64 X 10⁻³
Coeff. of linear thermal expansion 20-100℃	1/℃	17 X 10⁻⁶	17 X 10⁻⁶	21.9 X 10⁻⁶	23 X 10⁻⁶	23 X 10⁻⁶
Melting point	℃	1083	1083	658	658	600-650
Specific heat	J/kg/℃	393.5	393.5	711.7	921.1	879.2
Thermal conductivity	W/m2/℃	3.85 X 10⁶	3.85 X 10⁶	2.38 X 10⁶	2.22 X 10⁶	1.8 X 10⁶

# Significant cost savings can be achieved using CCA in lieu of COPPER

*for busbars in indoor installations at 35°C ambient temperature and 65°C bar temperature.

** Derating Factors:

– Temperature rise

– Skin effect and skin depth

– Proximity effect

– No of bars in parallel

– Enclosure material

– Creep resistance

– Fatigue resistance

– Reactance

– Vibration

– Effect of coating

– Heat loss – Convection, Radiation, Conduction

– Short circuit: Electromagnetic forces, Thermal effects

Electroplating Options

Tin

– Effective protection against corrosion

– Easy to solder

– Temperature resistance up to 120 °C

Nickel

– High conductivity

– Easy to solder

– High temperature resistance (200 °C)

Silver

– High corrosion resistance

– Soldered under certain conditions

– High temperature resistance (260 °C)