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ANSI device numbers:  A complete list of the ANSI standard device numbers of protective relays and other circuit elements. Read more....

IP Designations:  A table showing the complete designation of various IP numbers including the capabilities of enclosures against ingress of water or solid particles. Read more....

Search titles of Indian and International Standards:  If you want a brief info of the relevant Indian/International Standards applicable to an item, just enter the text in this page and do a search. A list of all matching standards with numbers will be shown. Read more....

Hazardous Area Classifications:  Details of zone categorisation of hazardous areas and the type of equipment that can be used in them. Read more....

Definitions and Concepts of flammability:  Terms like flash point, ignition point etc are defined and illustrated. Read more....

Types of Equipments for hazardous areas:  Various types of equipment like Type 'd' (Flame proof), 'e' (Increased safety) etc are defined and their usage patterns explained in detail. Read more....

Surface Temperature Classifications:  Any unprotected surface to which an explosive atmosphere has access may cause ignition. This categorisation demarcates electrical equipment which can be safely used for a particular area. Read more....

Data on flammable gases: Find the ignition temperature, vapour density, flash point, etc of flammable gases and also the temperature class and apparatus group of the equipment required to be installed in the vicinity of these gases. Read more....

Bearings and Lubrication:  The professional life of a practicing electrical engineer is full of rotating machines and movable parts. Right attention to bearings is a must for him. Some links which might be helpful for electrical engineers in particular are given. Read more....

Sizing of power factor improvement capacitors:  Use of static capacitors are now universal in improving the power factor of the system. This online calculator finds the kVAR rating of the capacitor you require to improve the pf from a particular value to a higher one. Read more....

Useful tables on power factor improvement:  Some tables like required switch gear for capacitors, recommended capacitor rating for welding transformers etc are given.  Read more....

Lightning Protection - Do you need it ? A calculator:  You have a building and not sure whether to go for lightning protection or not. IS 2309 has a solution for you. Enter some details and this calculator suggests if you need protection or not.  Read more....