Electrothermal installations. Application area

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Section 7. Electrical equipment of special installations

Electrothermal installations. Application area

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Encyclopedia of radio electronics and electrical engineering / Rules for the installation of electrical installations (PUE)

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7.5.1. This chapter of the Rules applies to production and laboratory installations of electric furnaces and electric heaters of industrial alternating current - 50 Hz, reduced below - 50 Hz, high-medium - up to 30 kHz, high - from 30 kHz to 300 MHz and ultra-high frequency - from 300 MHz to 300 GHz and DC (rectified) current:

arc direct (including vacuum arc), indirect action and combined heating with the conversion of electricity into heat in an electric arc and in the resistance of the charge, including ore-thermal (ore reduction, ferroalloy), as well as plasma heating and melting;
induction heating (including hardening) and melting (crucible and channel);
dielectric heating;
resistance of direct and indirect action (with any heater material: solid and liquid), including electroslag remelting furnaces¹⁾ - ESR, ESL casting and surfacing - ESHN, as well as electrode flux melting furnaces for the listed types of electroslag furnaces;
electron beam;
ionic;
laser.

The requirements of this chapter of the Rules apply to all elements of electrical installations of the listed types of electric furnaces and electrothermal devices of any design, purpose and operating modes, as well as with any media (air, vacuum, inert gas, etc.) and pressures in their working chambers.

1. The arc process only with a "hard start" of ESR furnaces and only a very short period of time, on average, about 1% of the melting period, and "hard start" is rarely used in ESR, and is not used at all in ESR and ESR. Flux-melting (slag-melting) furnaces during the arc process also operate for a relatively short time.

7.5.2. Electrothermal installations and the electrical and other equipment used in them, in addition to the requirements of this chapter, must also meet the requirements of Sec. 1, 2, 3, 4, 5, 6 to the extent that they are not modified by this chapter.

See other articles Section Rules for the installation of electrical installations (PUE).

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