Meaning of the word plinth. Telephone plinths Basic and auxiliary devices and accessories for mounting plinths with mortise contacts

The plinth is the main element of the telephone cross. The plinths are intended for switching subscriber or connecting lines of telephone networks. Each plinth is an element of a cable terminal device. It is installed in telephone boxes, boxes, and cabinets using mounting clamps. The world's leading manufacturer of plinths is the German company ADC KRONE, which develops and produces network equipment communications for high-speed transmission of digital, voice or visual data for corporate and private clients. ADC KRONE products are supplied to more than 150 different countries around the world. ADC KRONE's customers include operators of fixed and mobile telephone networks, as well as all those enterprises and organizations that wish to implement high-tech intradepartmental telecommunications solutions.

According to the type of contact, Krone plinths are divided into open and non-open. Krone openable plinth intended not only for connecting, but also for protecting low-frequency cables of communication networks. It has 10 pairs of nests. The cables are connected from the outside using special single-pair plugs, while inside The plinth separates telephone pairs according to subscriber numbers. The design of the Krone disconnectable plinth provides the option of installing lightning protection. Buy Krone plinths It is possible not only in many specialized stores, but also on the Internet.

Potential clients who want buy Krone plinths, offered a wide range of products, the most popular types:

Breakable plinth 2 10 Krone with normally closed contacts - plinth with normally closed contacts for 10 telephone pairs. It contains circuit breaking contact elements electrical connection. It is possible to monitor circuits in both directions, as well as the ability to install integrated protection elements;

The 2 10 Krone universal release strip is similar to the previous model. Differs in installation versatility: can be installed on mounting rods and mounting clamps;

Breakable plinth 2 10 Krone category 5e - with normally closed contacts. Designed for 10 pairs. Designed for a center-to-center distance between mounting rods of 95mm;

One of the main elements of a telephone crossover is a plinth. This device performs the function of switching subscriber and connecting telephone lines. Externally the plinth is plastic case, on the front of which there are two rows of mortise contacts. There are 10 contacts in each row. Depending on the model and your preferences, you can choose plinths whose contacts are numbered from 0 to 9 or numbered from 1 to 10. This does not in any way affect the actual functionality of the device, and is intended only for the convenience of installers.

A specialist from the network equipment company https://e-server.com.ua will tell you about plinths.

The specificity of contacts on plinths is that in order to terminate the conductor cores, it is not necessary to strip the insulation. Using a special tool, the cores are simply pressed deep into the contacts, and sharp knives These contacts cut through the insulation in the right places and ensure reliable fixation of the conductors.

EServer plinths are presented mainly in two types: openable and non-openable plinths. Openables work as follows. A cable is connected to it from behind, and its cores are distributed among the contacts along the subscriber lines. In non-opening versions, it is possible to install additional element– in particular, lightning protection.

The plinths differ, first of all, in the types of contacts. The 10 normally open plinth allows you to quickly connect linear circuits to terminal equipment. In the normal state, the conductors in such plinths are open, and special cords or plugs are used to switch them.

Normally closed plinths make it possible to obtain detachable connections. IN this type the contacts between the pairs are in a switched state. But their connection can be easily broken using a special plug installed between the junction of the contacts. Plinths with normally closed contacts have a number of design features: The guide lugs make the termination of conductors much easier, and thanks to the labyrinth-shaped plastic protrusions, the conductor can be pre-fixed in them even without termination.

The 10-pair non-breaking plinth differs from others in that it provides a permanent connection that cannot be broken. In plinths with non-breaking contacts there is an additional branch contact. This contact is placed between each contact pair. It is designed for parallel connection a control cord or arrester magazine, which allows you to protect the connection from overvoltage. To connect the grounding conductors, grounding strips are used. A ground wire is permanently connected to them, connecting it to the ground terminal.

To install telephone plinths, special boxes, cabinets or telephone boxes are used. Installation is carried out using special metal brackets (or, as they are commonly called, clamps). Depending on the capacity of the bracket, a very different number of plinths can be installed on it. But besides installing it on a bracket, there is another option - attaching the plinth both to the bracket and to special vertical rods with a leg diameter of 12 millimeters. After installing the plinth on the bracket, it can be fixed in the box for plinths. The box is a protected box equipped with cable entries and exits, as well as a lock.

The EServer telephone plinth is a high-quality product that allows you to reliably switch connections in networks. Along with plinths, all the accessories necessary for stable operation of the network are also available for sale.

Basic and auxiliary devices and accessories for mounting plinths with mortise contact.

The KRONE company produces accessories for plinths own production: touch-sensitive installation tools, measuring plugs, inserts and plugs, covers, marking elements, as well as protection devices - stores for protecting pairs on the plinth from the influence of excess current, equipped with gas dischargers, as well as plugs for individual comprehensive protection of pairs from the influence of excess currents and voltages.

INSTALLATION TOOL.

1. Touch mounting tool for the so-called "stuffing" the cores do not have their own name and represent mechanical device, intended for mechanical fixation of the core in the contact of the conductor. The tool also serves to remove excess length of the cross-connect wire after fixing.

Used to connect cores with a diameter (0.35...0.9 mm) and cores with an insulation diameter (0.7...2.6 mm). When the second wire is connected to the contact, the touch device is turned off (the parameters and number of connected wires depend on the connection technique used). The scissors can be disabled to allow the core to be connected to an adjacent contact (loop, loop).

Manipulating the Touch Mounting Tool

There is a simplified version of this sensor tool - a simple mounting tool. Used to connect cabling components without soldering, screw connections or the need to strip insulation. Can be used universally for LSA-PLUS modules in sizes 1 to 10 from KRONE and LSA-PLUS NT, as well as for RJ45 sockets with LSA-PLUS contacts. Installation tool provides gas-tight contact, without a cutting device, suitable for connecting cores of 0.35...0.9 mm and cores with an insulation diameter of 0.65...2.6 mm. Service life: > 100 connections.

Auxiliary mounting device for 10 pairs or universal installation help.

When using this universal installation aid during installation work There is always a reserve supply of cable core lengths.

Used for the following types of fittings:

• Mounting clamps size 2 by 10 pairs.
• LSA PROFIL frame systems for 8 and 10 pairs.

And for plinths:

• LSA-PLUS or LSA PROFIL 2/10.
• LSA PROFILE 2/8.
• LSA PROFIL NT 8 par.
• HIGHBAND.
• LSA PROFIL NT 10 pairs

ACCESSORIES LSA-PLUS and LSA-PROFIL.

1. Mounting clamps 2/10 and 2/8.

LSA-PLUS mounting clamps are made from U-shaped bent sheet metal of stainless steel. This ensures excellent stability and absolute corrosion resistance. Mounting clamps available in different depths and various capacities- for installation from 1 to 50 LSA-PLUS plinths.

• Mounting clamp for containers up to 70 pairs - depth 12.
• Mounting clamp for containers up to 100 pairs - depth 22.
• Mounting clamp for capacity up to 200 pairs - depth 30.
• Mounting clamp for a capacity of more than 200 pairs - depth from 50 to 80.

• Raster 25.0 mm with one-sided cross-connection.
• Raster 22.5 mm with double-sided cross-connection liner.
• The raster is 27.5 mm with one-sided connection of the cross-connection with increased insulation thickness.

Perforation "1".
When connecting cables or bundles of wires from the rear side in the center, for special purposes, with fastening mounting adapters to the wall, or for boxes of type KRONECTION-I, P, Ш and type KRONECTION A100.

Perforation "2".
When connecting cables or bundles of wires from the rear on the right, for universal use with asymmetrical fastening of mounting clamps (for example, cabinets: KSL, KWL or KWGL frames).

2. Mounting clamp 2/10 for 1...4 x 10 +1 plinth.

For installation of LSA-PLUS 2/10 plinths extra space for installation, optional

• Additional plinth LSA-PLUS 2/10.
• Marking frame 2/10.
• Grounding strip 2/38.

The 100-pair blocks of plinths appear optically separated (the raster size between the blocks is 30 mm).

3. Protective edging.

Auxiliary protective working tool to prevent injury when working on incompletely equipped mounting clamps.
Installs on unused teeth of the mounting clamp.

4. Nozzle for cable input/output.

Installed in holes with a diameter of 15 mm on the rear and side walls of the mounting clamp. Serve to protect core insulation from damage when wiring cable harnesses.

<>

5. Dust cap 2/10.

For installation on top of LSA-PLUS 2/10 plinths with an installation pitch of 22.5 mm.

• small
• deep

6. Marking frames.

a) Folding marking frame with marking plate.

Installed directly on the front side of the LSA-PLUS/PROFIL strip and surge protection magazine, with a transparent plate and a paper label. Without inscriptions, height 9 mm.

b) Overlay marking frame.

Installed on top of the LSA-PLUS/PROFIL strip and surge protection magazine, with a transparent plate and paper identification plate. When installed on top of the LSA-PLUS/PROFIL plinth, one overlying seat is covered.

c) Modular marking frame PROFIL with identification plate.

Universal for installation on the mounting clamp and on PROFIL rods. With identification plate, without inscriptions. Sign size: 95 x 18 mm. Takes the place of one plinth on the mounting clamp or on PROFIL rods.

7. Plugs and caps.

1) Disconnect plugs- serve to disconnect circuits in plinths.

2)Plug - plugs- serve for marking circuits, as well as to prevent disconnection of circuits in plinths.

3) Marking caps- serve for marking important lines in plinths.

They are marked by color: red, white, green, yellow, black, brown, blue.

4) Assembly kits:

A) 2/2, 4-pole plug kit - plug kit for installation on our own. With disconnect function (not suitable for LSA-PLUS/PROFIL strips with permanent contacts). Exist:

• no markings
• with markings
• with rollover protection

• b) Assembly kit 2/1, 2-pole plug - for do-it-yourself installation. Designed for parallel connection. Exist:
• with markings
• no markings

c) Plug assembly kit 2/6 - Plug assembly kit for do-it-yourself installation. With disconnect function.

Designed for LSA-PLUS/PROFIL plinths of type 2/6x3 or 2/8x3 with normally closed contacts.

8. Control and connecting cords.

A) Connecting cords - used for connections/disconnections, switching, parallel connections of subscribers, reinforced with LSA-PLUS plugs at both ends.

B) Control cords- used with plinths, providing the opportunity for measurements, control, temporary or permanent cross-connection. Non-disruptive connectivity ensures that critical data is not lost when current control chains. At one end they are equipped with an LSA-PLUS plug, and at the other end they are either not reinforced or reinforced with banana plugs.

Control cord 2/2

Control cord 2/4

Both cords are available in a variety of configurations to suit all measurement and connection needs.

Separate: 2, 3, 4 and 6 pole cords.

There is also a division by length: 1m; 1.5; 2; 3 meters.

9. Surge protection. Components.

Surge protection devices consist of components with functions to limit interfering influences to acceptable limits. It is therefore important to ensure that these protection devices are adapted to local requirements. These include operating conditions on the line and protection requirements resulting from the installation location. For guard input circuits switching stations and terminal equipment (telephone, fax, modem) must use multi-stage protection devices that can provide protection not only to personnel, but also to sensitive electronics. For use on a line, only primary (rough) protection is often sufficient. In cases where active components are installed in switch cabinets, it is also recommended to use multi-stage protection devices.

Regardless of the type and circuit used, all surge protection components are based on the same principle: any overvoltage is discharged into the ground. Depending on the component used, only a small part of the power is converted. One of necessary conditions This is due to the presence of low-resistance grounding.

Depending on the signal potentials, there are differences between 3-point and 5-point protection. For plinths with non-breaking contacts, only 3-point protection is possible, and for plinths with normally open contacts, 5-point protection is recommended (components connected in series in the line). When the protection plug is removed, the contact in the plinth opens, and possible currents will no longer be able to penetrate into the further connected circuit. 5-point protection can also be used for normally closed contacts.

ADC KRONE offers protection plugs in various designs:

• 3-point protection: surge protection only (primary or secondary protection)
• 5-point protection: overvoltage protection combined with overcurrent protection
• 5-point protection: step protection (primary and secondary overvoltage protection with overcurrent protection)

Single-pair protection components provide a safe and reliable solution in LSA-PLUS® and LSA PROFIL® switchgears and offer advantages over multi-pair magazines for 8/or 10-pair strips. Removing the protection plug of 1 pair does not mean that the entire plinth (all 8 or 10 pairs) remains unprotected. Partial or mixed equipment of plinths is also possible. Due to their small size, most matching plugs electrical protection(ComProtect® series A, B and H) offer both switching and cross-connection options with protection components in place. This ensures that all protection functions are fully guaranteed for both the communication equipment and the operating personnel.

The advantages of 8 and 10 pair protection magazines are based mainly on quick installation and low costs for installation of protection. As required, protection magazines for LSA-PLUS and LSA PROFIL can be installed in a cross-connect in combination with ComProtect® protection components.

1) Primary protection magazine for LSA-PLUS® plinths, type “2” - recommended for use as primary surge protection in analog and digital telecommunication systems. These stores are designed to fully equip plinths with normally closed or non-opening contacts LSA-PLUS and LSA PROFIL. When installed in LSA PROFIL switchgears, it is necessary to use earthing clamps for earthing through the PROFIL rods.

2) Primary protection plugs for LSA-PLUS® plinths, series “2” - recommended for use as primary surge protection in analogue telecommunications systems. These plugs are designed for partial or complete equipping of LSA-PLUS and LSA PROFIL strips with permanent or normally closed contacts in combination with grounding bars and grounding clamps.

It is possible to carry out cross-connection work on a protected plinth. The protection circuit consists of high efficiency 2- or 3-pole surge arresters and fail-safe thermal protection elements to protect the arresters from thermal overload.

3) Primary and current protection plugs for LSA-PLUS® plinths, series “2” - recommended for protecting switching and peripheral equipment in combination with existing secondary overvoltage protection. The use of reversible elements in overcurrent protection can enhance the response properties of the primary overvoltage protection component. The plug is designed for partial or complete equipping of LSA-PLUS® or LSA PROFIL® plinths with normally closed and normally open contacts in combination with earthing bars and earthing contact brackets. The protection circuit consists of a 3-electrode surge arrester, Fail-safe thermal protection elements and current protection components.

4) Multi-stage protection plugs for LSA-PLUS® plinths, type “2” - recommended for protecting switching and peripheral equipment in analog, ISDN, HDSL and ADSL telecommunication systems. These plugs are designed to partially or completely equip LSA-PLUS or LSA PROFIL strips with normally closed or normally open contacts in combination with ground bars and ground clamps. It is possible to carry out cross-connection work on a plinth with installed protection components. The protection circuit consists of a 3-electrode surge arrester, Fail-safe thermal protection element, reversing current protection elements and secondary diode protection elements.

Grounding bars for LSA-PLUS® plinths - used to install grounding between ComProtect protection plugs, LSA-PLUS plinths and the frame rack where the plinths are installed. When installed in cross-connect equipment, LSA-PROFIL is required additional installation grounding bracket.

Grounding bus for plinths of series “2” and HighBand® 10

The grounding contact bracket for LSA PROFIL plinths of type “2” ensures contact between the grounding bus and the frame of the cross-connect equipment. 2 brackets are required per plinth when using protection components with plinths of type “2”, installed on PROFIL round rods with a diameter of 12 mm.

Ground Bracket

6) 3-electrode spark gap - used primarily as a replaceable element of primary protection. Metal-ceramic 3-electrode spark gap, size 8 x 13. Electrical characteristics are ensured by filling the spark gap volume with a mixture of inert gases. For surge protection of 10 pairs, 10 units are required. arresters.

• Grounding that provides resistance to the passage of large currents.
• Effective overvoltage limitation.
• Discharge of large currents.
• Provides thermal protection through the use of a Fail-safe thermal protection element.

Note: Fail-safe security elements

Protection circuits with reliable integrated thermal protection elements are strongly recommended. Surge protection components are typically designed for surge loads only. Therefore, if there is a possibility of long-term overloads (for example, electrical contact), then it is necessary to ensure reliable grounding. Excessively loaded or heated protection components can lose not only their protective functions, but also cause fire or explosion, resulting in serious damage and expense.

Also in the ADC KRONE product range there are various magazines for surge protection. In addition to the LSA-PLUS and LSA PROFIL cross-connect equipment, the range includes magazines for the main cross-connect type 71 and other equipment (subscriber wire and PCB-type plinths). A variety of magazines are available to provide protection in the Type 71 main cross.

LSA-PLUS skirting boards It is considered to be the main switching unit of telephone cross-connect equipment. Structurally, the plinths are two rows of open or non-open contacts enclosed in a common compact housing made of thermoplastic polyester (polyester), which is both a non-flammable structural and good insulating material.

Decades ago, connections in main distribution boxes, distribution cabinets, and cable termination devices were primarily made using screws and soldering. With the advent of plinths using the mortise contact technique, the latter began to displace screws and soldering from the main cross-connections, and then, as their popularity grew, in distribution cabinets and subscriber boxes. Ultimately, LSA-PLUS plinths became the de facto standard for telecom operators' telephone switching and distribution infrastructure.

With the development of the LSA-PLUS ® contact, ADC KRONE, a pioneer in the field of mortise contact technology, has become a trendsetter on the global market. Currently, many manufacturing companies produce analogues of the popular ADC KRONE products. These are mainly openable and non-openable plinths, mounting clamps, 19" mounting frames, sensor tools, distribution boxes for installation inside and outside buildings. However, analogues of ADC KRONE equipment for solving large-scale problems of telecom operators can hardly be found, because because large operators mostly prefer only original ADC KRONE equipment.

Classification of LSA-PLUS plinths by contact type

Based on the type of contact, plinths can be divided into two large classes: openable and non-openable. Opening plinths, in turn, can be either with normally closed contacts or with normally open contacts. Quite often, customers who are uninitiated in all the intricacies get confused with the identification of plinths with a certain type of contact due to the fact that suppliers use different names for the same type in their price lists. The visual classification of plinths given below allows you to remember their main types.

It is worth noting that professionals only need one glance to visually determine the type of contact of the plinth. The fact is that the manufacturer took care of this - the plinth casings differ in color scheme depending on the type of contact.

Table No. 1. Match the color of the case and the type of contact of the plinth.

Non-breaking plinths LSA-PLUS (connection module)

The contacts of non-opening plinths are constantly closed, due to the fact that they are stamped from one continuous metal plate. One row of pins is the cable side, and the second row, labeled 0 to 9 or 1 to 0, is called the crossover/subscriber side. The middle row of contacts provides the possibility of: a) parallel connection for measurements; b) installation of surge protection elements.

LSA-PLUS disconnect strips with normally closed contacts (disconnection module)

Unlike plinths with non-opening contacts, the contacts of these plinths are also closed in the initial state, but if necessary they can be opened using a special plug or plug. By opening the contacts of the plinth using a test cord, you can: a) break the electrical circuit, b) test or measure the circuit in two directions, c) install elements of complex electrical protection. Two rows of contacts located opposite each other are used to connect the cable and cross-connect/subscriber side.

LSA-PLUS disconnect strips with normally open contacts (disconnection module)

LSA-PLUS 2/10 strips with normally open contacts are used primarily in combination with electrical protection components. In the initial state, the contacts of the plinth are open. LSA-PLUS 2/10 strips with normally open contacts provide the ability to connect up to 20 pairs, depending on the application.

At communications enterprises, as well as at other enterprises, when designing structured cabling systems (SCS), the question of selecting crossover equipment always arises. In this article we will try to give basic concepts on this issue.

Cross - this is a space (can be a room, a closet, etc.) designated for switching wires that are used in a telephone exchange, in a LAN or when laying optical communication channels.

For proper channel switching, there are many different types of devices, so in order to correctly select them and design SCS, you need to clearly understand what each device or system is needed for and how to correctly use and install it. Let us demonstrate this process using the example of equipment from one of the market leaders, Krone.

1. Types of crosses

So, you need to start purchasing equipment by choosing cabinets or racks for cross-connect equipment. They are open type(racks) or closed type(cabinets).

1.1. Closed crossovers (cabinets)

On sale you can find wall boxes, wall drawers, wall cabinets. They differ in capacity, purpose and type of fastening. For example, a box can be designed for a small capacity of up to 20 pairs, a cabinet - for a capacity of 100 pairs. These types of boxes, drawers and cabinets are attached to the wall. This equipment is manufactured in a special climatic design UHL category 3, that is, it is suitable for use in a moderately cold climate indoors. Small-capacity boxes and boxes are used to create intermediate crossing nodes or to connect subscriber lines directly from devices to the cable network of a floor, building, or structure.

For sale wall cabinets, which are attached to the wall and installed on a special floor stand, which serves to protect the connected cables from damage. This cabinet arrangement greatly simplifies installation and renovation work on a cross-connection, the outer frame can be replaced without disconnecting communication channels. Typically, such wall-mounted cabinets are designed for a large capacity, for example, 1200 pairs, and are used for the transition from main communication channels to distribution ones.

Among the wall cabinets, you can also choose equipment that can be installed on outdoors in climatic version UHL-1. These cabinets use double metal carcass, i.e. there is an outer frame that protects from external mechanical damage and climatic influences and there is an inner frame in which the plinths are placed. Outdoor cabinets are equipped double doors with special secret locks that protect the cross from unauthorized access by intruders.

1.2. Open type crosses (racks)

Racks can be produced in the following design solutions:

A) wall rack, wall cross or wall frame. Such equipment is attached to the floor and to the wall;

B) wall cross or wall frame, it is attached to the wall;

IN) floor-mounted double-sided cross or double-sided floor stand: Attached to the floor and ceiling. This type of fastening allows personnel to access the crossbar from four sides.

Access of unauthorized persons to the premises where the racks are installed should be limited for security reasons.

1.3. Criteria for selecting crosses

Let us explain the situations when you should choose closed crosses, and when open crosses are also suitable. If, when developing a project, the customer sets you requirements for dust protection and moisture protection, then it is better to choose closed cross-equipment (cabinets). This also applies to the requirements for climatic version(UHL-1, UHL-3), which we outlined in the previous section.

2. Skirtings

One of the main elements for installing cross-connect units is plinths; they are installed in cabinets and racks.

Plinth - this is a device in a plastic case that allows you to fix outgoing and incoming wires for switching channels using special clamps.

There are plinths with normally closed contacts and with non-opening contacts.

2.1. Non-opening plinth used in cross-connection to create a permanent connection.

2.2. In disconnectable plinths There are closed contacts that can be opened using a special device.

Also, plinths are also classified according to their steam capacity. They come in 5, 8 and 10 pairs. There are mainly 10- and 8-pair plinths on sale.

When selecting plinths, it is necessary to take into account the mounting options:

A) onto the mounting clamp,

B) on PROFIL rods,

B) on DIN rails,

B) universal.

Each plinth is marked with a special marking, for example, 2/10. This means that the plinth has 10 slots on both sides. But if it is additionally indicated in this way: 2/8x3, then this means that there are still 8 additional contacts for grounding the equipment.

2.3. LSA-PLUS technology

Krone has patented the LSA-PLUS technology. This technology allows you to very quickly attach the cable to the clamp. Moreover, this is done quite simply, without the use of labor-intensive soldering and screw connections, and in this case the specialist does not need to remove the insulation. This technology is considered throughout the world to be the most economical, easy to use, universal, fast and extremely reliable.

The basis of this entire system is the LSA-PLUS contact. With this connection, very high reliability and strength are achieved, even in the most unfavorable conditions environment such as humidity and corrosion, as well as exposure to strong vibration. The contact is installed quickly and accurately using a special tool.

3. Tools for working on cross-country equipment

As we already described in the previous section, in order to connect the cable to the clamp without using soldering, and also to eliminate the screw connection and not remove the insulation, specialists use a simple and inexpensive LSA-PLUS installation tool.

You can also recommend other tools to perform cross-crossing work (see the cross-crossing tool for more details). For example, a percussion instrument used for cross-connecting a cable. The tool is equipped with a rubberized handle and an adjustable impact mechanism; it can be used instead of a screwdriver (equipped with a special hook for these purposes). Such a tool usually has a small LED flashlight built into it.

It also wouldn’t hurt to purchase the LSA-PLUS installation aid, which is used both for mounting clamps, for the LSA-PROFIL frame system, and for plinths.

4. Protection for plinths

Let's take a closer look at the technology for protecting plinths from overvoltage, which was introduced by Krone.

The basic principle of such protection is that all currents are diverted to the ground. There are differences in the principles of organizing this protection, depending on the types of plinths used. If plinths with non-breaking contacts are used, then protection devices can only be connected in parallel. Including the "serial" type in a line protective devices available for plinths with contacts that are normally open.

4.1. In the case of using plinths with non-breaking contacts, it is mandatory to use only 3-point protection devices . There are such implementation options - the use of primary or coarse surge protection, it is also possible to use fine (secondary protection). It is important to know that such devices are only suitable for plinths with non-breaking contacts.

4.2. 5 point protection devices suggest the following mechanism of operation:

A) implementation of overvoltage protection together with current protection,

B) step-type protection, which implements a variant of primary and secondary protection in combination with current protection.

In plinths in which the contacts are normally open, it is allowed to install 5-point protection devices with the “series” type of connection to the line. Sometimes 5-point protection is used in plinths with contacts that are normally closed.

This protection technology, developed by Krone, is called ComProtect. To organize this technology in practice, integrated protection plugs are used. They provide protection for peripheral and switching equipment, both primary and secondary overvoltage protection, together with current protection. The plug is usually used to protect plinths.

How to choose plugs for protection? It is necessary to look at the operating voltage, both for the system being protected and for the plug itself. In principle, the protection is not required to operate under normal operating conditions, because the protection system itself may be damaged, and the signal will not be transmitted through the cable system. We also advise you to pay attention to the “current protection” option, namely protection from the tail of the pulse. If the protection elements are overheated or overloaded, then you need to be very careful, as they can cause a fire or even a fire.

5. Components for cross-connect installation

In previous sections, we described in detail what plinths are and what they are needed for. But during installation, you will have a question: how to mount the plinths in a rack or cabinet? To do this, first of all, you will need:

5.1. Constructs for installation in a 19" cabinet (rack)

Distribution sections are needed for mounting LSA-PROFIL plinths in a telecommunications rack or cabinet. You need to select sections based on the markings of already purchased plinths, for example for 2/8 or 2/10 plinths. Also consider the number of floors of the racks. Look at the connection capacity of this section, i.e. How many plinths is it maximally designed for?

5.2. For mounting clamps LSA-PLUS type plinths are fastened; the clamps themselves are attached to the wall of the box or wall cabinet (closed cross-connection). The requirements for them are such that they must provide resistance to metal corrosion and increased stability for the entire structure. When choosing mounting clamps, you need to look at the depth of the cable compartment they are designed for and for how many plinths they are intended for.

5.3. Control cords are intended for connecting devices for checking telemetric parameters of the cable system.

5.4. Connecting cords necessary for unification different areas cable networks into a common global network, they are also used to connect end devices.

5.5. Plug assembly kit used for terminating control or connecting cords by specialists in order to create convenient (non-standard length) cords. It can also be used as a repair kit: if the plug on the control cord breaks, there is no need to throw away the cord and buy a new one; it is enough to purchase an assembly set of plugs and replace the failed plug yourself.

6. Accessory components for Krone installation

Let us briefly explain the purpose of some Krone components that may be useful to you when installing the crossover. There are components that perform an information or marking function. That is, with the help of such devices, an installation or repair specialist can easily determine the purpose of a particular cable, port, plinth, etc.

Marking cap necessary when marking wires in LSA-PLUS or LSA-PROFIL plinths and additional insulation of connections.

Modular frames Designed for marking rows and blocks.

Folding frames can be installed on LSA-PLUS or LSA-PROFIL type plinths and on surge protection magazines. The frames come complete with paper nameplates.

When assembling plinths, you will need the following auxiliary components:

Switching adapter- used as a switch that provides continuous connection of lines on plinths (LSA-PLUS/LSA-PROFIL) with non-opening and normally closed contacts.

Disconnect plugs you will need to disconnect circuits in LSA-PLUS or LSA-PROFIL plinths with normally closed contacts, and is also used in control adapters.

Dummy plug, as a rule, is used in marking circuits, therefore it is available in various colors. In addition to this function, it also protects against unauthorized access to the contacts of the plinths if non-breaking contacts are used. And in the case of using plinths with normally closed contacts, this plug prevents the circuits from opening.

Dustproof cap Mounted on top of plinths to protect against dust and dirt. In order to break the wires and connect to them, you need a disconnect adapter. It is used in plinths whose contacts are normally closed.

Remote semi-ring necessary in order to evenly install the plinths on special rods.

Nozzle for cable input (output) used for mounting clamps. Protects cable insulation from external damage.

Sets of inserts with numbers- these are marking products that inform specialists and are used in marking plinths.

Mounting adapters - auxiliary elements, are used in the installation of mounting clamps and rods.

To secure various cables, you should always purchase a certain amount of special staples.

We hope that our article helped you in the difficult task of choosing equipment for installing a cross-connection. If you still find it difficult to classify and assign certain devices, you can always turn to the specialists of the SvyazKomplekt company for help.

See also:

Material prepared
technical specialists of the SvyazKomplekt company.