stb module

20 pair Terminal Blocks,20 Pair Connection Module

20 pair Terminal Blocks,20 Pair Connection Module

20 pair Terminal Blocks,20 Pair Connection Moduleis used in outside plant connection,cable punched and organized.we also called it 20 pair STB Module,Or 20 Pair STB



Description:Modules CW VX are developed for guaranteeing the simple, reliable and maintainable joint between the pairs of distribution cable and the chains of user installation or the ancillary circuits from the service equipment.

Their construction ensures electrical protection and testing of lines, and because of the application to 5- polar insertable modules is provided both the through connection and the number of other functions, as a result of which it is ensured the efficiency of the modernization of the allowed services without the resealing of the connections of wires.

Modules are recommended for: the external application, including in cases when of an environmental condition it is most aggressive, the end fitting is in cases when at the point of user necessary the replacement of the types of the elements of electrical protection or types of the utilized filters.

For the use for such purposes the blocks of the end fitting are arranged by the units of modules down 5 pairs, by maximum capacity to 50 pairs (with the step of a change in the capacity, equal to 5 pairs). The additional connection of official pair if necessary can be provide ford.

The construction of block is intensified because of the application of an angular tire through the stainless steel, which ensures mechanical strength to assembling. The elements of grounding each pair are electrically connected together, with the screen of cable and with the end fitting of grounding, located beyond the cable end of the block, near the connection of official pair, if the same is provided.

The pairs of cable are connected due to the plant conditions down the tail end of the block with the application of fitted contacts and with the subsequent hermetic sealing by filling for the sake of epoxy resin for guaranteeing the overall protection from the environmental effects. The openings under the fastening, which ensure the possibility of the installation of block beyond the flat surfaces, are provided on both longitudinal sides of block.


Length of cable, m


Quantity of the pairs

Length, mm

10 + the official pair

20 + the official pair

30 + the official pair

50 + the official pair





Technical characteristics

Characteristics of the contact connection
Connector of the distributive wire

Range of the section:

diameter 0,4… 1,2 mm

Diameter on the isolation:

it is maximal 5 mm

The current-response characteristics:

20 A(10 A on each conductor) during not less than 10 min, without the deformation of the module

Note: if is required resistance to the flow of current from 20 A to 30 A, this is ensured by the application of gas-discharge arresters of different types

Insulation resistance


“Dry” atmosphere:

> 10 12 Ohm

“Moist” atmosphere (standard ASTM Of d618, procedure F):

> 10 12[Om]

Salt fog: (standard ASTM Of b117)

> 10 10 Ohm

Immersion beside the water: (15 days before 3% solution Of naCI)

> 10 10 0[m]

The contact resistance


R of material + R of the contact cross connection + by R of the contact connection of the wires

< 10 m

Increase in the contact resistance


After climatic testings:

<2,5 m 

After 50 connections - turning offs:

<2,5 m

Dielectric strength:

>3 kV of direct current during 1 minute

Mechanical characteristics

Hullthe material of strengthening the block:

Stainless steel

Heat-shrinkable tubing:

Polyethylene with the adhesive sublayer

Screw of the connection of the distributive wire:

Special alloy Of zamac, [passivirovannyy], with the paint and varnish coat

Housing of the unit of the connection of the distributive wire:

Transparent polycarbonate


Polycarbonate, glass-reinforced, resistance to fire “VO”

Fitted contacts: (before the module of connection)

Tinplated phosphor bronze

Contacts of the grounding: (before the module of connection)

Alloy Cu - Zn - Ni - Ag

Contacts of the connection: (before the insertable module)

Tinplated solid bronze

Sealing material before the lower part:

The epoxy resin

Sealing material before the upper cable part:

Silicon compound

Cover of the pair of the distributive wire:


Housing of the insertable module:

Polycarbonate, glass-reinforced, resistance to fire “VO”

Sealing material of the insertable module:


The ring gasket:

Elastomer EPDM

Cable laying is the distributive wire:

Thermoplastic rubber