Indal Handbook For Aluminium Busbar Hot

A hot busbar dissipates heat into the surrounding environment via two primary mechanisms outlined in the INDAL handbook:

Surfaces must be brushed and cleaned with a specialized oxidation inhibitor grease. indal handbook for aluminium busbar hot

The (open air, indoor panel, or isolated phase busduct). A hot busbar dissipates heat into the surrounding

| Parameter | Limit (INDAL/E91E Alloy) | Consequence of Exceedance | | :--- | :--- | :--- | | | 105°C (Class B insulation rating) | Annealing (loss of tensile strength) | | Short Circuit Temp (1 sec) | 250°C | Permanent deformation, joint loosening | | Junction/Contact Temp | 90°C (with bolted joints) | Creep relaxation → arc flash risk | | Ambient Correction | Derate 1.5% per °C above 35°C | Premature aging of insulation | where (A) is the required cross-sectional area, (I)

Aluminum is roughly half the weight of copper for an equivalent current-carrying capacity, reducing the structural load on enclosures and buildings.

where (A) is the required cross-sectional area, (I) is the short-circuit current, (t) is the fault duration, (Q_1) is the initial temperature, and (Q_2) is the final allowable temperature.