Signal transformers E'lektrotexniceskii zavod series SOBS, ST, etc.

Signal transformers SOBS.
SOBS-XX: SOBS - signal single-phase armor; dry; XX — serial number (2A; 3A; 3B).
ST-X: ST - signal transformer; X — serial number (4; 5; 6; 3 S).
General industrial design (A);
Fire-fighting performance (P);
Sealed version (D).
Operating conditions:
the height above sea level is not more than 1000 m;
Ambient temperature from minus 40 to +40 °C;
Relative humidity up to 80% at a temperature of 20 ° C;
the environment is non-explosive, does not contain caustic vapors in concentrations that destroy metals and insulation, is not saturated with conductive dust;
Installation in metal cabinets or enclosed spaces;
Natural air cooling.

Signal single-phase transformers (ST) with natural cooling are used for power supply of traffic lights. These transformers are connected to the supply network with a frequency of 50 Hz.

Models: SOBS-2A, SOBS-ZA, SOBS-ZB, ST-3S, ST-4, ST-5, ST-6, SOBS-2AP, SOBS-ZAP, SOBS-ZBP, ST-3SP, ST-4P, ST-5P, ST-6P, SOBS-2AG, SOBS-ZAG, SOBS-ZBG, ST-4G, ST-5G, ST-6G

• SOBS, ST. Technical specifications.

Track and signal transformers with improved sealing have the abbreviation GW in their name. Electrical parameters, as well as overall and connecting dimensions correspond to transformers of general industrial design, at the same time, the moisture protection of the transformer has been significantly improved.
In GV series transformers, the base and top cover are made of glass-filled armamide, and the inside of the assembled transformer is completely filled with a special electrical compound, which ensures the tightness of the coil and the terminals of the contact group.

Models: SOBS-2AGV, SOBS-3AGV, SOBS-3BGV, ST-4GV, ST-5GV, ST-6GV

• SOBS, ST with improved sealing. Technical specifications.