Voltage and Frequency Limits of Electric Motors – IEC 60034-1
Electric motors rated for use on a fixed frequency power supply, combinations of voltage variation and frequency variation are classified as being either zone A or zone B, in accordance …
IEC 61850 Changed Electrical Protection, Control and Monitoring
Intelligent Electronic Devices Electrical protection is as fundamental to the generation, transmission and distribution of electricity as generators, transformers and transmission lines. A couple of decades ago microprocessor based relays …
National Electrical Code (NEC) and IEC 60364 – Electrical Installations for Buildings
This study was undertaken as part of the NEMA Global Strategy Initiative to increase sales and use of NEMA electrical products in markets around the globe and to make it …
Equipment Selection – Metal-clad or Metal-enclosed Switchgear
Introduction It is the Electrical Engineer’s responsiblility to select electrical equipment. The choice between metal enclosed and metal-clad switchgear is a decision for the Electrical Engineer to make. Metal-clad switchgear …
Non-hazardous Area – IEC 60079
What is IEC 60079 IEC 60079 is a series of international standards addressing the equipment and systems intended for use in explosive atmospheres. These standards is published by the International …
IEC 60865 Short-circuit currents – Calculation of effects
What is IEC 60865? IEC 60865 pertains to standards set by the International Electrotechnical Commission (IEC) that address the effects of short-circuit currents in three-phase a.c. systems. The purpose of …