Tools and protective devices for the maintenance of electrical items

1. BY
Prof. Ranjitkumar Parmar
Head, Electrical department
Govt Polytechnic Junagadh
Gujarat India

2. Guess ..
Difference between tools &
Instruments
 A tool is a specialized implement, designed or crafted
for a task. An instrument isthe next level or two up.
Something more sophisticated than a tool, usually
designed for measurement. An apparatus is a
combination of instruments and possibly toolsfor a
particular purpose.
Electrical Engg. Dept Govt Polytechnic Junagadh
Gujarat India

3. Identify these tools
Electrical Engg. Dept Govt Polytechnic Junagaadh
Gujarat India

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Gujarat India

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Gujarat India

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Gujarat India

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Gujarat India

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Gujarat India

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Gujarat India

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Gujarat India

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Gujarat India

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Gujarat India

13. Try Recollecting Tools
 Screw drivers
 Spanners… Fixed or Ring
 Pliers
 Knife, wire cutters
 Smooth & Rough Files
 Bearing puller
 Cleaning solvent, PVC, Cotton tape, varnish etc
 Soldering iron
 Insulating sleeves, ferules etc
Electrical Engg. Dept Govt Polytechnic Junagaadh
Gujarat India

14. INSTRUMENT..
 IDENTIFY THESE INSTRUMENTS..
Electrical Engg. Dept Govt Polytechnic Junagaadh
Gujarat India

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Gujarat India

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Gujarat India

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Gujarat India

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Gujarat India

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Gujarat India

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Gujarat India

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Gujarat India

22. Instruments..
 Multi meter
 Megger
 Earth tester
 Ammeter, wattmeter, voltmeter, Techometer
 Line Tester
 Spring Balance
 Micrometer
 Oscilloscope
 Clip on meter
Electrical Engg. Dept Govt Polytechnic Junagaadh
Gujarat India

23.  Phase sequence meter
 Thermometer
 Spirit level
 Test lamp
 Magnetic compass
 Standard wire gauge
 Filler gauge
Electrical Engg. Dept Govt Polytechnic Junagaadh
Gujarat India

24. PROTECTIVE DEVICES
 IDENTIFY THESE PROTECTIVE DEVICES
Electrical Engg. Dept Govt Polytechnic Junagaadh
Gujarat India

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Gujarat India

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Gujarat India

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Gujarat India

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Gujarat India

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Gujarat India

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Gujarat India

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Gujarat India

32. Protective devices used in
Electrical equipments
 Fuse
 Overload relay
 Thermal overload Relay
 Electromagnetic O/L realy
 Under voltage / Over voltage realy
 Single phasing preventer
 Temperature controller
 Switch or circuit breaker
 Earthing
Electrical Engg. Dept Govt Polytechnic Junagaadh
Gujarat India

33. Thanks
Electrical Engg. Dept Govt Polytechnic Junagaadh
Gujarat India