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Nilesh Singh
APAC Vertical Growth Leader in Renewables and Power Utilities | nVent
Proper earthing and bonding connection is an essential element contributing to the overall functionality and reliability of an earthing system of the utility T&D electrical installations.
This paper will provide a detailed comparison of the different types of earthing and bonding connection methods used in utility transmission and distribution applications. It will provide guidance to the reader to help understand and be able to make an informed decision, when selecting the best earthing and bonding connection installation methods for their application in compliance with applicable standards. The reader will be assured that the earthing connection will perform in a satisfactory manner over the lifetime of the installation under all operating conditions, environmental and installation specific.
The paper will first focus on the utmost importance of the earthing connections to qualify to the stringent testing requirements of IEEE std 837, which is called upon in various earthing standards and specifications in Australia. The test regime described in the IEEE std 837-2014 standard will be discussed in detail. The reader will get an appreciation on the significance of the required tests performed under the latest version of the standard.
The paper will further elaborate the importance of installing the earthing connection correctly and will discuss the prerequisites to make an effective earthing connection. Selection of the correct tools and competence in carrying out the installation is equally crucial. Some of the common practices utilised in the industry will be reviewed.
The fundamental physical and performance characteristics and requirements of the earthing system will be revisited, reinforcing the necessity of proper earthing connection in utility applications.