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Protection Engineering

JMB Engineering provides specialist protection engineering services, ensuring your electrical network is properly coordinated and your protection devices operate correctly when called upon.

From relay settings calculations and grading studies through to on-site injection testing and commissioning, our protection engineers work across the full lifecycle of protection systems in mining and industrial environments.

What We Deliver

  • Protection coordination and grading studies
  • Relay settings calculations (overcurrent, earth fault, differential, distance)
  • Protection relay commissioning and injection testing
  • Protection settings review and audit
  • CT and VT sizing and specification
  • Protection philosophy development
  • Incident investigation and root cause analysis (protection-related)
  • AS/NZS 61850 and IEC 61850 system design

All injection test results, maintenance testing reports, relay settings and coordination records are stored on our Protection Database platform — giving your team easy-to-access compliance records and a centralised, auditable register of all protection assets and their history.

We work with all major relay manufacturers including SEL, ABB, Siemens, GE and Schneider, and our engineers hold the relevant mining industry safety qualifications for site attendance.