Accession Number : AD0284088

Title :   LEVEL CONTROL RELAY DU-4 WITH VARIABLE INDUCTOR

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : ALEKSEYEV,V. ; YAKOBSON,V.

Report Date : 06 AUG 1962

Pagination or Media Count : 1

Abstract : VNIKhI has constructed a level control relay DU-4 with a variable inductor. With rise in level of the refrigerant a steel tube welded to the float passes into the solenoid increasing its inductivity. The current thereby falls from 0.2 0.25 to 0.03 - 0.05 a. One or more electromagnetic relays of the ET-523 type are connected in the coil circuit, actuating signal lamps, bell, solenoid valve and/or compressor starter. Diagrams are produced of the signalization, safety cut-out and control circuits of the device and examples are given for its adjustment. Its advantages over the previous design of the float relay DU-3 with mercury switches is its greater reliability, the use of two small section instead of four large section leads, simplicity and universality of the circuit, and its capability of functioning at low temperatures and under vibration. (Author)

Descriptors :   *LIQUID LEVEL CONTROL, *REFRIGERATION SYSTEMS, AUTOMATION, COILS, ELECTRIC RELAYS, MONITORS, SIGNAL LIGHTS, SOLENOIDS, ACOUSTIC SIGNALS, SWITCHING CIRCUITS

Distribution Statement : APPROVED FOR PUBLIC RELEASE