FIELD: physics.
SUBSTANCE: heater control system having electric heating elements, powered from three-phase alternating current source through solid-state relays, connected to controller, and equipped with safety switch unit, characterized by that each of heating elements (G) is connected to separate solid-state relays (K1, K2, K3) of proportional control and all proportional control solid-state relays (K1, K2, K3) are connected to controller (S) through control signal repeater (W).
EFFECT: higher efficiency of heating elements control.
3 cl, 2 dwg
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