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close this bookCircuits, Formulas and Tables Electrical Engineering - Basic vocational knowledge (Institut für Berufliche Entwicklung, 201 p.)
close this folder4. Electrical Machines
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Open this folder and view contents4.1. Direct-current Machines
Open this folder and view contents4.2. Three-phase Machines
Open this folder and view contents4.3. Transformers

(introduction...)

Designation of electrical conductors

Alternating current



any external conductor

L


1st external conductor

L1


2nd external conductor

L2


3rd external conductor

L3


neutral conductor without the function of a protective conductor

N

Direct current



any external conductor

L


positive external conductor

L+


negative external conductor

L-


central conductor without the function of a protective conductor

M