FIELD: electrical equipment.
SUBSTANCE: invention relates to the electrical equipment. Electrical installation with forced cooling contains power electrical appliances 1 installed on radiators 3. Drive electromotor 8 is equipped with regulator 9. Current relay 2 is introduced, contacts of which 10 and 13 are introduced into circuit of rated speed of regulator 8 of pump 6 motor 7 and time relay 12. In operating mode, regulator 9 provides high motor speed. At transition to standby mode for some time this speed is kept (3–5 times of cooling time constant), and then within several seconds it is reduced to 15–25 % of nominal.
EFFECT: higher reliability.
1 cl, 3 dwg
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