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STK boxes are the additional connecting chambers for all types of telephone sets and signaling devices made by TELVIS. They also can be used for passage and terminal connecting of intrinsically safe circuits in the telecommunication networks of mines and other facilities where there is hazard explosion of gases of I or II group. The individually made STK boxes enable to place inside them the underground cables with the amount of bundles from 5x2x0,8 or other cables and conductors depending on the user’s needs. The connecting blocks used in the STK.-. boxes make possible of dividing cables of the ore intersection from 0,4 to 2,5 mm2.

STK technical data

Marking I M1 Ex ia I, II 1G Ex ia IIC T6
Dimensions 140x140x90 mm
Weight 1.0 kg
Casing protection degree IP65
Operating temperatures range from -40° to +40° C