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close this bookCircuits, Formulas and Tables Electrical Engineering - Basic vocational knowledge (IBE - Deutschland; 201 pages)
View the documentPreface
Open this folder and view contents1. Selected Graphical Symbols of Electrotechnology
close this folder2. Bell Circuits
View the document2.1. Direct-current Bell
View the document2.2. Alternating-current Bell
View the document2.3. House Bell Installation
View the document2.4. Alarm Systems
Open this folder and view contents3. Basic Circuits of Illumination Engineering
Open this folder and view contents4. Electrical Machines
Open this folder and view contents5. Contactor Circuits
Open this folder and view contents6. Rectifier Circuits
Open this folder and view contents7. Measurement Circuits
View the document8. Protective Circuits
Open this folder and view contents9. Circuits in Motor Vehicles
View the document10. Tables
Open this folder and view contents11. Basic symbols and formulas of electrical engineering
 

2.1. Direct-current Bell


Direct-current bell to be actuated from one place


Direct-current bell to be actuated from two places


Bell installation for reciprocal calls


Sell installation for reciprocal calls with key change-over switch


Bell installation for reciprocal calls with switch-on push-button, line-saving


Bell installation for reciprocal calls, line-saving

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