Introduction Of Electric Pump, Dol Starter, And Inverter | Multi Skill Foundation - Grade 10 PDF Download

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SESSION 2: INTRODUCTION OF ELECTRIC PUMP, 
DOL STARTER, AND INVERTER 
 
We use several electric appliances in our day to day lives. The working of these 
appliances is dependent on electricity. Several times, there is a power cut from 
the source. What options are available in such cases? How can the electricity be 
provided in such cases? How does an electric motor work? We shall be learning 
these Chapters in the following lesson. We will also be learning the working of 
various electrical appliances and what care should be taken while using them. 
Objectives 
1. To know the structure of inverter and electric pump 
2. To pursue the technique of using an inverter and electric pump 
3. To study the working of a DOL starter 
4. How to do the maintenance of inverter and electric pump 
INVERTER: 
An inverter is an electronic circuit. Its job is to convert the DC voltage from the 
battery into AC voltage i.e. into a form usable for supplying electricity for 
household use. Along with the inverter, the circuit includes another small 
electronic circuit called the battery charger to 
charge the battery when the battery is not in use. 
When the main electric supply stops in our home, 
we require another source of electricity to run the 
electric equipment. In this situation, we may store 
the electricity in battery and use it according to 
our necessity. The charged electricity in battery is 
in DC Voltage and the inverter converts the DC 
Voltage to AC voltage.      
       Fig 10 - Inverter 
 
INVERTER+ BATTERY 
'Inverter + Battery + Battery charger' works as a 
contingency system for situations when the main 
electric supply stops. But the system does not 
automatically switch on when the electric supply 
stops. This needs to be done manually. Hence this is 
called an offline system. 
 
Fig 11 - Inverter + Battery