Paralleling Generator Systems
Electrical Engineers must ensure when designing generator systems that generators and the electrical loads are appropriate for the particular application. Standby power for health care facilities or prime power for …
Circuit Breaker Interrupting Capacity and Short-Time Current Ratings
Low-voltage circuit breakers interrupting capacity ratings and short-time current ratings define different circuit breaker performance characteristics. Electrical Engineers use these ratings to select the protective device ratings to suit their …
Limiting transferred earth potentials
The IEEE Green book Std, 142-2007, IEEE Recommended Practice for Grounding of Industrial and Commercial Power Systems defines transferred earth potential as the voltage to earth of grounding systems that …
What is an Effective Grounding?
Effective grounding is essential to: Prevent the enclosure of an electrical equipment and its connected conductors rising to a potential dangerously above that of its surroundings or ground. If the …
IEEE Std 3002.8 – IEEE Recommended Practice for Conducting Harmonic Studies and Analysis of Industrial and Commercial Power Systems
Introduction This guide discusses the basic concepts involved in studies of harmonic analysis of industrial and commercial power systems. The need for such an analysis, recognition of potential problems, corrective …
IEC 61439 – Relationship between peak current and short-time current
Short-circuit withstand ratings of a switchboard or motor control centre is a measure of its ability to withstand the dynamic and thermal stresses when a fault occurs within or near …