Specific electrical resistance of various materials. Scheme, description

ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Specific electrical resistance of various materials. Encyclopedia of radio electronics and electrical engineering

Free technical library

Encyclopedia of radio electronics and electrical engineering / Electrician's Handbook

Starting active resistances can be quite easily manufactured in a production environment. In this case, as a rule, fechral, nichrome, constantan and other materials are used as conductors, and a cylinder made of ceramic materials or asbestos is used as an insulator.

In their manufacture, it must be taken into account that during the start, a current will flow through the resistance for a short time, five times the rated current in three-phase mode.

Table 16. Electrical resistivity, Ohm. m (at 20 °C)

Electrical resistivity of various materials

Table 16 (continued). Specific electrical resistance, Ohm. m (at 20 °C)

Electrical resistivity of various materials

Author: Korshevr N.G.

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