Design & Analysis
Air Gap in Magnetic Circuits: Theory, Practical Implications, and Flux Fringing Effects
This article reviews the role of the air gap in magnetic circuits, including its influence on magnetic relucta…
3 min read
Insights
Tech Insights
Engineering notes on power quality, voltage regulation and substation design from the RIYE team.
Transformer Technology
Low-Voltage Power Transformers: Theory, Design, Applications and International Efficiency Standards
A complete reference for transformers from 110 V to 1000 V: core and winding materials, thermal life, K-factor for non-linear loads, autotransformers, CTs, vector groups, per-unit calculations, voltage regulation and…
14 min read
Design & Analysis
The Per-Unit System in Transformers
In power systems engineering, transformers operate across different voltage levels. This complicates calculations because impedances must be referred …
3 min read
Design & Analysis
Magnetic and Transformer Design: Principles, Methodology and a Low-Voltage Application
Principles, Methodology, and a Low-Voltage Power Transformer Application
5 min read
Maintenance & Asset Management
Transformer Health Assessment: Repair vs. Replacement Decision Guide
The average design life of a transformer is 25 to 30 years. However, with modern diagnostic tools, many units can operate safely for over 40 years, wh…
4 min read
Grounding & Safety
Transformer Grounding: The Neutral Point and Why Grounding Matters
In power system engineering, grounding (or earthing) is not merely a regulatory requirement; it is a critical design element that ensures personnel sa…
3 min read
Grounding & Safety
Grounding for Data Centers and Semiconductor Fabs: TN-S vs. TT
Before the comparison, it is essential to define the structures of these systems:
3 min read
Maintenance & Asset Management
Transformer Thermal Management and Life Expectancy
The reliability and operational lifespan of a power transformer are primarily governed by its insulation system. Heat is the most significant factor i…
3 min read
Transformer Technology
Power Transformer Engineering: Topologies, Core Architectures, Thermal Management and Selection
Target Audience: Electrical Engineers, Grid Architects, Procurement Leads (USA, EU, Japan)
10 min read
Power Quality
Open Delta (V-V) Connections and the 190 V High Leg: Utilisation Factors Explained
Is the utilisation of a V-V connection 0.577 or 0.866? Both — measured against different bases. This report derives each factor, explains the internal 30° displacement, and shows why the…
14 min read