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 …
1. Arc-Flash Hazard Warning The requirement of arc-flash hazard warning in the Philippine electrical Code 2017 is stipulated in Section 1.10.17 Arc-Flash Hazard Warning. This section of the PEC requires …
IEC 60909 recommends the calculation of maximum and minimum short circuit currents. The article expounds the discussion on the purpose for maximum and minimum short-circuit currents. Maximum short-circuit currents need …
Low Voltage is mentioned many times in the Philippine Electrical Code (PEC). However, the PEC failed to explicitly include Low Voltage in the definition of terms. The purpose of the …
What is ground-fault protection? Ground-Fault Protection of equipment is a system intended to provide protection of equipment from damaging line-to-ground fault currents by operating to cause a disconnecting means to …
Contents I. What is ATEX? II. Explosive Atmosphere