pls sent ppt about automatic load sharing of transformer

hai, can u give full information about automatic load sharing of transformer

(29-10-2013, 02:08 PM)Guest Wrote: hai, can u give full information about automatic load sharing of transformer

yes i have all information about automatic load sharing of transformer

(11-10-2014, 09:51 PM)Guest Wrote: yes i have all information about automatic load sharing of transformer

Power travels from the power plant to house through an amazing system called the power distribution grid. For power to be useful in a home or business, it comes off the transmission grid and is stepped-down to the distribution grid. This may happen in several phases. The place where the conversion from "transmission" to "distribution" occurs is in a power substation. It has transformers that step transmission voltages (in the tens or hundreds of thousands of volts range) down to distribution voltages (typically less than 10,000 volts). It has a "bus" that can split the distribution power off in multiple directions. It often has circuit breakers and switches so that the substation can be disconnected from the transmission grid or separate distribution lines can be disconnected from the substation when necessary. Transformer is the vital component in the electric power transmission and distribution system. The problem of overloads, voltage variation and heating effects is very common. It takes lot of time to its repair and also involves lot of expenditure. This work is all about protecting the transformer under overload condition. Due to overload the efficiency gets reduced and the secondary winding gets overheated or it may be burnt. So, by reducing the extra load, the transformer can be protected. This can be done by operating another transformer in parallel with main transformer through comparator and change over relay. The comparator compares the load on the first transformer with a reference value. When the load exceeds the reference value, the second transformer will automatically be connected in parallel with first transformer and share the extra load. Therefore, two transformers work efficiently under overload condition and the damage can be prevented. For home appliances, commercial and industrial loads, the transmitted voltage must be steeped down to a distribution level. This may happen in several phases. In sub-stations the voltage gets stepped down from transmission level (in the tens or hundreds of thousands of volts range) to the distribution level (typically less than 10,000 volts).

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