Transformer Protection Application Guide
This guide provides a summary of information on protecting various types of electrical equipment, with a primary focus on the application of protective relays for power transformer protection. It emphasizes …
Bus Protection Considerations
Selecting an appropriate bus protection scheme requires careful consideration of several factors, including bus layout, permissible switching scenarios, availability of suitable current transformers (CTs), and maintenance requirements. High-impedance bus relaying …
A comparison between XLPE and EPR as insulating materials for HV cables
Let us compare crosslinked polyethylene (XLPE) and ethylene propylene rubber (EPR) as insulating materials for high voltage (HV) cables. Both XLPE and EPR have their merits, and the choice depends …
Importance of Earthing Only One End of a Cable
Multi-core cables are particularly used for control, instrumentation, computers and telecommunications. These cables carry very small currents in their conductors compared to power cables. These currents feed into very sensitive …
Neutral Grounding
Introduction In power system, grounding or earthing means connecting frame of electrical equipment (non-current carrying part) or some electrical part of the system (e.g. neutral point in a star-connected system, …
Effect of Voltage on Induction Motor Characteristics
Whenever the voltage at the terminals of an induction motor varies from its nameplate rating, either performance or life is sacrificed.The effect may be minor or serious depending upon the …