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Components of LT switch gear: Switch Fuse Unit (SFU), MCB, ELCB, MCCB.

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Switchgear: The apparatus used for switching, controlling and protecting the electrical circuits and equipment is known as switchgear. Classification of Switchgear: Switchgear can be classified on the basis of voltage level into the following:  1. Low voltage (LV) Switchgear: up to 1 KV   2. Medium voltage (MV) Switchgear:  3 KV to 33 KV   3. High voltage (HV) Switchgear: Above 33 KV . Components of LT Switchgear: The term LT Switchgear includes low voltage Circuit Breakers, Switches, off load electrical isolators, HRC fuses, Earth Leakage Circuit Breaker, Miniature Circuit Breakers (MCB) and Molded Case Circuit Breakers (MCCB) etc i.e. all the accessories required to protect the LV system. The most common use of LV switchgear is in LV distribution board. FUSE: Fuse is the simplest and cheapest device used for interrupting an electrical circuit under short circuit, or excessive overload, current magnitudes. The action of a fuse is based upon the heating...
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Batteries

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  Types of batteries All the electrochemical cells and batteries are classified into two types: Primary batteries (non-rechargeable) Secondary batteries (rechargeable) A Primary Battery is one of the simple and convenient sources of power for several portable electronic and electrical devices like lights, cameras, watches, toys etc. As they cannot be recharged electrically, they are of “use and throw” type. Usually, primary batteries are Inexpensive  light weight small and very convenient to use with relatively no or less maintenance. Majority of the primary batteries that are used in domestic applications are single cell type and usually come in cylindrical configuration (although, it is very easy to produce them in different shapes and sizes). A Secondary Battery is also called as Rechargeable Battery as they can be electrically recharged after discharge. The chemical status of the electrochemical cells can be “recharged” to their original status by passing a current throu...
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