Entering A Hazardous Area
Even when work is not being conducted, caution is needed when entering a hazardous area. Regardless of whether work is to be actioned the following actions should be taken before you enter a hazardous area:…
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Permit To Work Systems
Permit to work systems are fundamental to ensuring that work is safely actioned. The purpose of the permitting system is to ensure that all work to be performed will not adversely affect plant operations, and…
Hazardous Area Responsibilities
The plant owner has numerous responsibilities related to hazardous areas. These responsibilities are stated in AS/NZS 60079.2017 book 14 and 17, and include: Ensuring that systems are in place so that all hazardous areas are…
Occupational Health And Safety
Faulty hazardous area electrical installations have the potential to cause a major catastrophe on a facility. Each state and territory have their own Occupational Health and Safety Act. As of 2019 the legislation is administered…
What Our EEHA Course Covers
In this blog, we expand on what the Electrical Equipment in Hazardous Area (EEHA) course covers. The EEHA course is designed to provide you with the practical skills and knowledge to undertake electrical work in…
Current Transformers
Current transformers normally have a single conductor as a primary winding connected in the run of the line conductors. The voltage which appears across the primary terminals is very small and therefore the voltage at…
Switching Programs Terminology & Abbreviations
Before starting to write a switching program, it is important to understand and use standard terminology. The table below includes some common fields found on templates. Program Field Meaning Program number This is obtained…
Switching Programs & Switching Operations
High voltage switching is a high-risk task, and as such the use of switching programs is critical. A switching program is a written list of sequential logical operations to permit isolation and re-energisation of electrical…
Ring Main Units
Ring main units (RMU) are widely used in industry and for distribution systems. RMUs operate independently, which means that it is possible to earth an incoming supply cable while it is still energised from the…
Power & Distribution Transformers
The standard power transformer is “on-load tap changing” (OLTC) to ensure that the secondary distribution voltage is within limits although the primary voltage may change. Tap changer range is usually from 15% above normal to…