This lecture is presented by Ms. Apoorva Gupta, Asst. Professor of Biyani International Institute of Engineering and Technology. Base load plants supply the electric power constantly through the 24 hours of the day while the peak load plant supply the electric power only during the peak hours of the day and they generally supply the load for 4 to 8 hours of the day which is generally from 10 am in the morning to 4 pm in the evening.

This lecture is presented by Ms. Apoorva Gupta, Asst. Professor of Biyani International Institute of Engineering and Technology. Motor is basically that device which convert electrical power into mechanical power .There are five types of motor first, separately excited motor .second self excited motor which is further subdivided into two types series excited motor and shunt excited motor third one is compound excited motor it is sub divided into long shunt compound excited motor and short shunt compound excited motor.

This lecture is presented by Ms. Apoorva Gupta, Asst. Professor of Biyani International Institute of Engineering And Technology. Hydro Power Plant uses kinetic energy of water to generate electricity, it is generally used as peak load power plant and its working time is generally of 4 to 8 hrs. These power plants are of reversible type means they work as generator when supplying the load and as motor during the night time duration or off peak hours.

This lecture is presented by Ms. Apoorva Gupta, Asst. Professor of Biyani International Institute of Engineering And Technology. Types of D.C. Link this lecture explain in detail the types of d. c. links which are mono polar, bipolar and homo polar .These types of dc links help to transmit bulk amount of electric power through the HVDC Transmission line.

This lecture is presented by Ms. Apoorva Gupta, Asst. Professor of Biyani International Institute of Engineering And Technology. Power Modulator are those devices which are used to convert the given electrical power into the desired power for e.g. the supplied power is of ac form than and required is dc than we will employ rectifier power modulator for converting ac power into dc , and if the given form is dc and required is ac than we will employ a inverter power modulator.

This lecture is presented by Ms. Apoorva Gupta, Asst. Professor of Biyani International Institute of Engineering And Technology. Transformers are static devices who transfer electric power from one circuit to another with changed voltage levels but keeping the system frequency constant. They are of two types step up and step down. Transformer has two windings one is primary and other is secondary winding and these are both placed in the transformer tank.

This lecture is presented by Ms. Apoorva Gupta, Asst. Professor of Biyani International Institute of Engineering And Technology. Generator is basically that device which convert mechanical power into electrical power .There are five types of generator first, separately excited generator .second self excited generator which is further subdivided into two types series excited generator and shunt excited generator third one is compound excited generator it is sub divided into long shunt compound excited generator and short shunt compound excited generator.

second system of pulleys consisting of two blocks. The upper block carries three wheels which freely rotate about their individual central axes and are supported over a single common axle which is firmly fixed to a rigid upper frame. The lower block also contains similar pulley and axle mechanism; however the whole structure is supported by one end of an intertwined string configuration passing through the pulleys, as illustrated in the figure. The other end termination of the string which passes across the uppermost pulley is used for the application of the effort. The weight is supported by the axle of the lower block. And as usual MA and the efficiency may be written as given for the first system of pulleys.

Lifting machines are tools that make work easier
They have few moving parts
These machines use energy to work
Do work with one movement
Make our work easier by letting us use less mechanical effort to move an object

The power arm will always be of the same length as the weight arm in a pulley of the first order. In other words, the effort must be equal to the weight in order to keep the lever in equilibrium. Tension in the rope will be be equal to the effort. it has a velocity ratio of one.