RPEQ Audit, Arc Flash & Containment — 11/1kV Underground Substation

Overview

A business specialising in the overhaul and refurbishment of heavy mining equipment was completing work on an 11/1kV underground substation for a mining customer. The substation required a formal compliance audit under AS5368 — the Australian Standard for electrical installations in underground mines — along with arc flash and arc fault containment assessments before it could be returned to service.

Grid Dynamics was engaged to deliver all three studies, providing the client with a comprehensive package of RPEQ-certified engineering documentation covering their substation’s compliance, arc flash risk, and containment.

Scope of Work

• RPEQ-certified audit of the 11/1kV underground substation against the requirements of AS5368, identifying any gaps in compliance and documenting findings
• Arc flash study for the substation, determining incident energy levels at relevant equipment and establishing arc flash protection boundaries
• Arc fault containment study assessing the ability of the substation enclosure to contain an arc fault event, and identifying any venting or containment requirements
• Preparation of formal engineering reports for each study, certified by a Registered Professional Engineer of Queensland (RPEQ)
• Documentation of any required corrective actions arising from the audit findings

Outcome

The client received a complete set of RPEQ-certified engineering documents covering the AS5368 audit, arc flash assessment, and arc fault containment study — providing the formal assurance needed for regulatory compliance and operational confidence.

Where the audit identified gaps against AS5368 requirements, these were clearly documented with practical recommendations for rectification, giving the client a clear path to achieving full compliance.