Electrical Compliance Audits

AS 4871

All mains powered mining machinery need to be audited against AS 4871. 

This includes design review for compliance against referenced Ex standards and regional legislative standards.

We  provide an extensive design review inclusive of component CoCs to ensure your equipment meets legislative requirements. 

AS 4240 

Remote controlled mobile machinery used in underground mining and tunneling applications have an obligation to comply with  AS 4240. 

If you're unsure of your equipment's compliance, we can provide you with an independent assessment. 

IEC 909

We use SKM's Power Tools to provide coordinated power protection analysis of electrical designs for mobile machinery. 

These powerful tools provide a systematic suite of programmes to validate designs and protection settings for 3-Phase Short Circuit, Line to Line Short Circuit, Line to Ground Fault, Line to Line Fault, Arc Flash and Ampacity.

It additionally generates time current curves that allow clear and accurate review of overall protection characteristics.

IEC 60079

We are currently working on our licensing to provide design and assessment services compliant with Part 0, 1, 11, 18 and 25.

IEC 61508

Where functional safety is required, we can assess your design to a level of SIL2. Our system approach is generally 1oo2 by design but can readily adapt to 2oo2 or 2oo3.

IEC 60255, IEEE C37.96 and NEMA

IEC, IEEE and NEMA standards (and related matter white papers) offer detailed (but differing) guidance on the principles required to reliably protect electric motors against thermal rating overloads which can significantly reduce winding life. 

At Max, we prefer the NEMA model given it accounts for differences in motor acceleration and inertia requirements that can significantly affect calculation outcomes. Accordingly, we offer auditing of your control system's thermal rating overload protection by systematically logging setpoints in a TCC graph to determine if protection is working inside or outside of a nominated curve.