Cable of the TZG brand is a low-frequency telephone cable, homogeneous with cord-paper insulation, in a lead sheath, without protective coverings.

Telephone (city),

Insulated cores twisted into a star-shaped quadruple,
Bare (in a lead sheath).

Application:
The TZG cable is intended for laying telephone and telegraph nodes, input and insertion devices into overhead communication lines, connecting linear devices between automatic telephone exchanges, as well as automatic telephone exchanges and automatic telephone exchanges of mobile communications.

The cables can be used to connect lines in separate circuits in the frequency range up to 552 kHz (for transmitting up to 120 channels of voice frequency). The working voltage of cable circuits is up to 430 V DC or up to 300 V AC.

It is used for laying in telephone ducts, pipes, blocks, collectors, tunnels and indoors in the absence of mechanical impacts on the cable, in an environment neutral with respect to the sheath.

In accordance with the technical conditions, the operation of this type of cable is allowed at external temperatures from -45 ° C to + 45 ° C. They are intended for manual and mechanized installation at temperatures from -15 ° C to + 40 ° C, bends during installation must be made at a temperature of at least -10 ° C. With strict adherence to all installation recommendations, the average service life of a telephone cable is at least 30 years.

Design:
Conductive core made of copper wire with a diameter of 0.9 or 1.2 mm;

Insulation of cores - cord-paper;

Star-shaped quadruple twist of four insulated cores;

The core is twisted into concentric strands from groups;

Belt insulation made of two overlapping paper tapes;

Sheath made of lead-antimony alloys of the Ssu grade.