Electrical Protection, Fire and Safety

The word ‘earthing’ is used in UK whereas ‘grounding’ in US but meaning the same. Earthing has a significance in electrical engineering to the fact that earth has very high capacitance of .0007 F, a very high value assuming it be infinity, and not to cause any potential change (V=Q/C) when gaining or loosing even enormous […]

Cables are used for transport of electric power from one place to another with freedom to take it through any available space. Transmission of electric power through cable has the following advantage over overhead wire Very less right of way Lower visibility Minimum effect due to bad weather like storm etc Aesthetic with clear sky […]

There was news in Times of India that 2 held for filmaker’s death – shop owner accused of causing death due to negligence. The mother-son were accused of leaving naked electric wires dangling out in the open in contravention of safety norms that led to the freak yet fatal accident. Careless usage of electricity leads to this. Electrical safety […]

There are innumerable cases of fire and accidental death due to electrocution. What goes wrong and how it is not detected in time?  Primarily there are two causes for this playing with the protection loose connection Protective system do operate correctly most of the time but there is a chance of protection failure at the […]

Indian Electricity Rules, 2005 defines the basic fundamentals of Electricity Safety, and when followed in totality  there cannot be any incidence of electrocution or electric fire. General Safety requirements are given in Chapter IV under rules 29 to 46 which covers installation, protection, operation, maintenance  cut-out, identification of earth, earthed  terminal, danger notice etc. General Rule 29 covers installation shall be constructed, […]

Coach Train Lighting 110V system is used for train lighting with floating potential. Positive and negative circuit runs separately on two different side panels of the coach and comes together only near lamp, fan and switch. A fault in one wire will not cause any problem but as soon as there is occurrence of another […]

Protection system of Tap changer locomotive is primitive based on the technology prevailing during 50s. This was imported along with WAG1 class of locomotive and continued to be followed with all class of locomotive developed later on.   The protection system comprises of instantaneous relay detecting over current in AC and DC system. DC system is […]

Electrical protection system is to identify the changes in the current and voltage parameter as a consequence of a fault which may result in damage to the equipment and beings. The detection then result simultaneous isolation of the faulty equipment. There are four aspects involved in designing protection system for any installation namely Characteristics of […]