In the study of fundamental diagrams define the poles of the electric circuit and set the direction of current is from plus to "minus". Identify the components of the schema: contacts, resistors, diodes, capacitors and other elements included in the circuit. If the schema contains a few circuits, you should read them one by one, examining each sequentially.
First, read the schema, determine everything included in a circuit of a power system. Locate the power source, relays, electromagnets, if they are provided. Identify all sources used current (direct or alternating), its phase or polarity.
In the study of schema you need to have an understanding of the operation of each circuit element separately, starting with the simplest components. A resistor is a passive element of the electrical circuit and is designed, generally, to power dissipation, voltage drop. In the diagrams he used to refer to the resistance function and is displayed in the rectangle. The capacitor, however, accumulates electric energy of alternating current, the sign – two parallel lines.
Read all the explanatory notes given in the diagram. If the device is motors or other power consumers swipe their analysis. Consider all of the chain data items from one pole of the power source to the other. Note these circuits arrangement of resistors, diodes, capacitors and other components of the scheme. Make a conclusion about the practical value of each element of the scheme and the failure of electrostrictive when you lock or absence of any of the parts of his chain.
Precise location of protective devices: relay, maximum current, fuses and automatic regulators, as well as items switching. On the concept of electrostrictive can be marked with labels indicating the security zones each of the elements, find them and compare with other data circuit.