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: Request permission to enter the…
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 that it can be safely…
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: The employee also has certain responsibilities related to hazardous areas.These include: Plant owners and employees with hazardous…
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 by the following entities. …
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 a hazardous area. It aligns…
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 the secondary terminals is small.…
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 from the operating authority Written…
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 plant and/or equipment. The prime…
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 other end or operate a…
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 5% below, and has up…