Compliance to Statutory Laws
I was reminded of this article which I have written about many years ago when I attended some product presentations about variable speed drives. What catch my attention most was …
IEEE Transformers Categories
There are four (4) categories of transformers according to IEEE Std. C57.12.00 – IEEE Standard for General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers. Categories of Transformer Rating Category …
Sub-synchronous torsional interaction (SSTI)
Definition Sub-synchronous torsional interaction (SSTI) is a phenomenon in power systems where mechanical torsional oscillations of a turbine-generator shaft interact with the electrical sub-synchronous frequency components of the power system. …
Flame Retardant and Flame Resistant Cables – Differences, Applications and Standards
Application Flame retardant cables and fire resistant cables are both designed to withstand specific fire-related hazards, but they serve different primary purposes. Flame retardant cables are designed to prevent the …
What is the difference between a metalclad switchgear from metal-enclosed switchgear?
I. Introduction Metalclad switchgear and metal-enclosed switchgear are terms used to describe types of switchgear constructions, primarily in the realm of medium voltage (MV) systems. While they are often used …
Arc-flash – hazards, mitigations and standards
What is Arc-Flash? Arc-Flash is a type of electrical explosion that occurs when an electrical current leaves its intended path and travels through the air from one conductor to another …