Attaching the armored cable to the support. Installation of vols on outdoor lighting poles. SIP installation cost

The construction of networks is associated with their installation and laying. If possible, experts prefer to use the underground (trench) method. But if there is no such possibility, all that remains is laying the telephone cable along the poles.

Pole laying: rules, facilities, amenities

Laying a telephone cable along poles is a less expensive, simple and convenient form of tensioning communication wires. Today there are several standard ways mounting:

supporting - made using supporting clamps where the cable runs only in a straight line. The angle of rotation should not exceed 10-20 degrees;
tension - requires the use of rigid fastening tension clamps used for rotary, ring installation sections, as well as throughout the route. The method is convenient for its efficiency, it does not require additional cleaning of the ends, allowing you to quickly and without additional tools to install;
the combined method is used where the route is laid both on straight lines and on corners, turning, ring sections. It is most convenient in conditions of increased movement of air flows, as it provides a reliable and durable fastening.

It is worth noting that combined method significantly reduces financial expenses for repairs and construction.

The convenience of laying a telephone cable along the poles is that:

no need to open roadbed;
you can "hang" the system in dense urban areas,
financial savings.

In addition, the external broach is convenient in operation and repair: you can always see where the rush occurred.

Cables for laying indoors (, TTsPPt) are designed for local networks subscriber access. Like all systems used internally, they differ:

fire safety,
high quality transmission,
interference protection,
flexibility
increased strength.

Cables : characteristics

TTsPPt cables are telephone wires successfully used for local networks. Installation is carried out in a hanging way. Rated voltage is not more than 225V AC and up to 200V DC. Transmission speed up to 2048 kbps. Structure of the TCPT:

conductive conductor - soft copper wire;
insulation - polyethylene film up to 0.2 mm. thick;
one pair of insulated cores, differing in color, is twisted in a unidirectional twist with unequal and non-multiple steps;
galvanized steel wire - load-bearing cable;
the overall sheath for the wire is light-stabilized polyethylene.

The system is installed at temperatures from -50 to + 60C, the minimum possible bend is 10 cable diameters, the service life is up to 25 years.

Cables TPPSHt: characteristics

Underground workings, data transmission from mines - all this is impossible without a cable of the TPPSHt brand. In addition, the wires are successfully used in the ground installation of the system. Ability to work under extreme low temperatures(up to -60С), flexibility and high reliability of communication provided the wires with popularity in conditions of increased aggressiveness of the environment. Design elements:

copper wire,
polyethylene insulation,
aluminopolymer tape - screen,
galvanized steel wire - load-bearing cable,
PVC compound- outer shell.

The right choice of cable for communication is an uninterrupted supply where it is really needed.

"There is only one way to do

great job to love her."

Steve Jobs (Founder of Apple)

One of the main directions of our company is the design and construction of fiber-optic communication lines.

Our base prices for laying FOCL along city lighting poles and power transmission line poles

Installation of FOCL on outdoor lighting poles.

At present, the Internet is very popular, and, of course, the cable for the Internet is not the same as for power supply, but fiber optic, which provides good and fast communication. There are four types of pads fiber optic cable, air, underground, inside buildings, underwater.
OK suspension options have a number of advantages compared to other construction methods:

no need for land acquisition and coordination with interested organizations;
reduction of construction time;
reduction in the number of damages in urban areas and industrial zones;
reduction of capital and operating costs in areas with heavy soils

Installation of an optical cable using tension clamps.

Anchor clamps AC6-7-10 ( Russian counterparts- PA06-07).

Anchor clips can be used with both "8" and self-supporting cables. Clamps for suspension of cables with a support element made of steel wire allow you to quickly cable installation, without stripping and separating the power element. plastic loop on clamp cable provides insulation load-bearing element in the event of a short to ground support. It is NOT recommended to use such clamps when installing a cable with a steel wire strength element; with a long-term load, the teeth of the wedges begin to slip along the smooth wire, which leads to cable damage.

Tension spiral clamps.
Tension spiral clamps are used for mounting self-supporting cables (ADSS) on power line poles, power poles, lighting, contact network Railway The fastener consists of a protector, a loop-shaped power spiral coated with a special abrasive and a thimble.

Mounting an optical cable using support clips.

Support clamps are used for sections where the cable runs in a straight line, the maximum angle of rotation when using such clamps is from 10 to 20 °. Domestic and foreign manufacturers offer a variety of clip options for supporting mounting of self-supporting (ADSS) and 8-gang cables.

Clamps PPO-d1/d2-03.
Clamps PPO can be used on routes with the risk of falling trees, damage to poles. When a tree falls on a cable or a pole is damaged, the cable breaks out of the clamp and usually remains undamaged.

Examples of using PPO clamps in combination with various nodes mounts.

Clips supporting spiral.
Spiral clamps are used for mounting self-supporting cable (ADSS) on power line poles, lighting and communication poles. Many modifications are available for various lengths span and cable termination strength. Fasteners consist of a protector - to protect the cable sheath from damage, a power spiral and a thimble.

Support clamp SC30/34.
Universal clamp for hanging "8-shaped cables", can be fastened with a steel tape, or with a bolt to wooden supports. Allows you to install a cable with a cable diameter of 4 to 9 mm.
Differs in simple and quick installation, but has some limitations. When using such clamps, it is important to accurately select the diameter of the cable, in practice there have been cases of cable slipping through the clamp, it is also important to strictly observe the recommended span length. The practice of using such clamps has shown that it is best to use them in combined version installation (Alternating anchor and support clamps).

Support clamp JHC.

JHC clamps are used for mounting ADSS cable, up to 20mm in diameter, it is recommended to use it on straight sections of the route.

According to the experience of use, we can say that such clamps are good for small spans - up to 60-70m, installation during rain is practically impossible, since the cable slips through the sleeve.

Video laying optical cable on poles

Installation of an optical cable by the combined suspension method.

The combined suspension method is widely used when using clamps PPO, SC30\34. The essence of the method is the alternation of supporting and tension (anchor) clamps. In this way, you can increase the reliability of the line and reduce costs.

If, when laying a communication line, it is impossible to lay through sewer lines, then laying through the air is carried out using the so-called "atmospheric" types of cables. They have polyethylene or polyvinyl chloride insulation.

Laying on poles is carried out strictly according to the technical characteristics of the cable itself. The distance between the poles should be carefully maintained, and on the poles the cable is fastened with a “glass” type of connection, with the possibility of additional clamping (in winter and summer, the clamp is adjustable, since the cable is temperature-dependent environment can be pulled up and down).

The power cable for laying on poles has an aluminum or copper core. The first option is cheaper, but the cable has more resistance than when using a copper core. A power cable of the VVSG brand with a steel core for laying on tables can also be used. The latter type can withstand high mechanical loads (wind, hurricane, gusts), is multi-level (two or more layers of insulator).

For attaching a cable to wooden poles connection type PPO is used, with rubber gasket. Such a connection is adjustable, the thickness of the cable can be from 0.3 centimeters to 5 centimeters. The most important thing is to provide secure fastening to the base itself.

When using a PPO type connection, the cable is movable. Every 5-10 supports, a non-moving mount is installed so that the cable can be pulled.

Optical power cables are attached to the supports using open-type anchor clamps. At the same time, the pillars themselves are necessarily concrete, deployed type of fastening. The mass of the cable to be supported is calculated over the entire length of the span.

Also, for the transmission of electricity over the air, a universal cable Multi-Whiskey (Multi-Wiski) is used for laying on tables, which has a galvanized carrying cable, and polyethylene-based insulation. Such cables are well protected from moisture. The advantages of such a cable include ease of installation and installation. The cable is self-adjusting in tension, so there is no need to make descents between the poles. As a rule, both phase and zero are mounted in one cable, which allows more efficient use of the free area of the pole attachment.

In the event of a break in the air cable, it is connected by the same type of cable, fastening - anchor. If a break occurs between the poles, then the entire span is replaced, the cable connection is carried out directly on the pole. Usage different types cable in this case is also prohibited in order to avoid a drop in resistance. Also gasket power cable on poles requires maintaining the same resistance of the conductor from the supply station to the final addressee (or transformer).

Introduction

Hello, dear readers of the site Elesant.ru. Today I want to talk about attaching the cable to the support when it is lowered into the trench. A variety of special devices are available for attaching the cable to the support, and connecting the cable to overhead line regulated by normative documents. That is what this article will be about.

A variety of special devices are produced for attaching the cable to the support, and the connection of the cable to the overhead line is regulated by a number of regulatory documents. That is what this article will be about.

After preparing the trench, to enter the power supply into the house, lay the cable into it, enter the power cable from the trench into the house, you need to fix the cable on the support and connect the input cable to the overhead line.

Attaching the cable to the pole

When lowering the cable into a trench, starting from 2 meters above the ground, the cable must be protected with a pipe. The pipe must climb the support, bend at an angle of 90 ° and protect the cable in the trench for a meter.

Here I would like to dwell on the established bending radii of pipes when laying electrical cables in them.

When bending pipes, the bending angle and bending radius are normalized. bending angle metal pipes for laying electrical cables in them, it is standardized at 90 °, 120 ° and 135 °. The bending radius directly depends on the section electric cable, and, accordingly, the diameter of pipes for electrical wiring. See figure for bending radii.

So-so, the supports are higher than two meters, and you need to connect to the overhead line almost at the top of the support, there remains a certain section of the cable without protection. You can protect it with a simple metal corner (see photo below, arrow 10) with shelves suitable for the diameter of the cable.

The figure below shows an example of lowering and attaching the cable to the terminal support. The overhead line in the figure is made with insulated SIP wires. By the way, such a line is designated VLI (isolated overhead line).

The overhead line CIP wire is attached to the support with an anchor tension clamp (8). The anchor tension clamp is fixed with a loop on the anchor bracket.

The cable descending into the trench has metal protection and armor. The most popular cable for laying in trenches is VBbShv. metal protection cables must be grounded. (PUE, ch.2.4) For this PEN conductor air line is connected with a piercing through clamp (7) to a flat clamp (4) and a ground wire.

All fastenings to the support are made with mounting crimp tapes (2). The crimp tape is tightened with a special clamp (lock) (3).

The place of cable section and stripping of armor and insulation is protected by a heat-shrink cuff, a “glove” (6).

1. Anchor bracket;
2. Crimp mounting tape;
3.Skrepa for fastening the mounting tape;
4. Flat clamp for connecting ground wires;
4a. Earthing wire armored cable coating;
5. Heat-shrinkable protective cuff, "glove";
6.Clamp, piercing through passage with a branch. Connects the PEN conductor to the ground wires;
7. Anchor tension clamp for SIP wires;
8. Bandage cable strap; Insulating cap;
9. Protective cap for wire;
10. Metal corner to protect the cable to the pipe.

There are many types of cable attachment to a support on sale when descending into a trench, but I described the principle of lowering and attaching a cable to a support above.

Same mounting tapes it is possible to fix the introductory device, electric meter and any other electrical equipment on the support.

Section: Home connection

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Technology of installation and repair of SIP wire on supports

For the construction and reconstruction of modern power lines, SIP wires have long been used. They are highly reliable and rarely require repairs. Often VLI is enough to carry out preventive measures or just an inspection. Today insulated wire began to be widely used not only for the construction of the highway, but also for connecting the input of the building.

Installation of cable on poles

Overhead power lines with SIP wires are called VLI. Their installation traditionally begins with clearing the area from trees, shrubs, and other possible obstacles that interfere with rolling and pulling wires on supports.

When building a new power line, it is more convenient to mount the wire brackets to the pole on the ground before installing it. The brackets are fastened to the supports with a clamp made of corrosion-resistant steel tape. After tightening, excess tape is removed.

Poles with mounting brackets are installed and begin laying overhead power lines. Installation of self-supporting insulated wires on supports is carried out using components with outdoor temperature air below 20°C. The SIP installation technology has its own peculiarity associated with rolling out the wire. It provides insulation protection from damage. The wire is rolled out from a drum installed on the machine. On the supports, the SIP is distributed using rollers and a tension rope - the leader.

Manual unrolling of wires

The technology of unwinding from the SIP coil provides for the manual execution of the process, provided that the site is limited to one hundred meters, and the cross section of the phase conductors does not exceed 50 square meters. mm. It is allowed to manually roll out the wire in settlements, where the span length does not exceed 50 m. The manual rolling technology has the following sequence:

At this stage, the installation of SIP in one span is over. The following spans are mounted in a similar way.

Cable connection

Having laid a self-supporting wire on supports, you need to connect it to the main power line and lead input from it to the house:

Connecting the input of the building to the highway

It is better to connect the input of the house with a common trunk with a SIP-4 cable with your own hands. Self-supporting wire consists of four strands of the same cross section twisted together. There are two ways to enter the house.

Ground method from the post

The ground method is a connection internal wiring home to the nearest pole. The support should not be located further than 25 m from the building, otherwise you will have to install an additional pole near the house at a distance of 10 m. Between the poles, the wire leading to the house for supplying electricity must be at least 6 m from the ground.

Do-it-yourself connection of a self-supporting wire to the line is carried out with clamps. But first you need to lay out the SIP on the wall of the house. To keep the wire firmly on the facade, anchor clips are attached to the wall. They are a bracket with a loop attached to the wall with a dowel. To secure the cable, you just need to pull it with this loop. Installing brackets on the wall requires compliance with safety regulations, according to which the distance between the brackets and the ground must be at least 2.75 m.

Next comes the input street cable to the house. If a switch box installed on outer wall at home, then the SIP cable is brought only to it. Connecting the internal wiring to the shield is done with a VVGng cable. It is more elastic and smaller in diameter. The location of the electrical panel inside the house will require the introduction of SIP through the wall, although many electricians recommend taking the shield outside and leading the VVGng cable from it into the house. SIP is allowed to be used for outdoor and internal works, so it's easier to bring it inside the house right away. Only in the wall where the SIP will pass, it is necessary to install a metal sleeve.

When all communications are laid, it remains to make the input connection to the highway on the pole. Do-it-yourself connection is performed in this order:

Anchor brackets are attached to the wall of the house and the pole.
Near the house, the wire is fixed with a clamp to the bracket.
The SIP roller block is pulled between the building and the pole.
The edge of the cable on the pole is fixed with a clip with a loop, putting it on the anchor bracket.

Now it remains only to connect the outlet cable to the common line with suitable clamps.

Underground way from the post

Input connection underground way more relevant, since the wire is protected negative impact atmospheric phenomena, fire and accidental breakage. underground installation happens in this order:

The introductory cable is lowered from the pole into a trench dug to the house. The minimum depth of the trench is 80 cm. The area under the road is deepened to 1 m.
In the trench, the SIP is laid in a metal or plastic sleeve. The same sleeve should come out of the ground up the post, at least 2 m high;
At backfill trenches on the surface install signal beacons that warn of the passage of the cable.

Cable entry into the house is done under the foundation through the sleeve or lifted along the wall if the switchboard is located on the street.

SIP repair

During operation, the wire separate sections may be damaged and require repair. For phase or zero conductor repair small area damaged insulation is performed without removing the voltage. The damaged core is separated with plastic wedges from the common bundle and a double layer of adhesive insulation is applied to it, after which the wedges are removed.

Repair of a phase conductor with a length of no more than 2 m in a span is carried out without replacing the entire bundle. The damaged section of the core is separated with wedges and its replacement is made. To do this, take a piece of wire of the same brand and section and insert it instead of the damaged segment. The ends are connected with branch clamps. It is possible to use a piercing clamp without stripping the insulation.

Repair of a long section of damaged wires is carried out after a power outage. A span with a section requiring replacement is grounded on both sides. The cable is disconnected at all branch terminals and lowered to the ground with ropes. Further repair consists in replacing the damaged section, after which the entire span is lifted onto supports for connection to the highway.

Repair of a branch to the house is done if more than 20% of the wire of its total length is damaged. The work may be carried out under de-energized or energized, but the load of the consumer must be disconnected. The input cable is disconnected at branch clamps. First, the phase core on the support is turned off, and then the zero one. The end of the wire is tied to a support to prevent it from falling. Having freed from the anchor bracket, the SIP is lowered with a rope to the ground, where it is repaired. Raising to the support and connecting to the highway occurs in the reverse order.

Correct installation SIP, timely identified damaged section of the cable and its repair will provide uninterrupted supply electricity to the consumer.

sarstroyka.ru

Installation of cable on supports and poles

During the construction of networks, communication operators often face the inability to use cable ducts or buildings. For passage through the air suspension method, in such cases, installing the cable along lighting poles or power poles can greatly facilitate the task. There are several standard methods mounting:1. supportive. 2. Stretch.3. Combined. Let's consider each of the methods in more detail.

1. Mounting the optical cable using support clips.

Support clamps are used for sections where the cable runs in a straight line, the maximum angle of rotation when using such clamps is from 10 to 20 °. Domestic and foreign manufacturers offer many options for clamps for supporting installation of self-supporting (ADSS) and 8-shaped cables.

Clamps PPO-6.5/8.0-06 or ZP-8-1(2)

Clamps PPO or ZP can be used on routes with a risk of falling trees, damaging poles. When a tree falls on a cable or a pole is damaged, the cable breaks out of the clamp and usually remains undamaged. Examples of the use of PPO clamps in combination with various attachment points.

Clips supporting spiral.

Spiral clamps are used for mounting self-supporting cable (ADSS) on power line poles, lighting and communication poles. Many modifications are available for various span lengths and cable termination strengths. The fastener consists of a protector - to protect the cable sheath from damage, a power spiral and a thimble.

Support clamp SC30/34 or CS Universal clamp for suspension of "8-shaped cables", can be fastened with a steel tape, or with a bolt to wooden supports. Allows installation of cables with a rope diameter of 4 to 9mm.

Differs in simple and fast installation, but has a number of limitations. When using such clamps, it is important to accurately select the diameter of the cable, in practice there have been cases of cable slipping through the clamp, it is also important to strictly observe the recommended span length. The practice of using such clamps has shown that it is best to use them in a combined mounting option (Alternating anchor and supporting clamps).

Supporting clamp HC 10/15.

Clamps HC 10/15 are used for mounting the ADSS cable, up to 20 mm in diameter, it is recommended to use it on straight sections of the route.

According to the experience of use, we can say that such clamps are good for small spans - up to 60-70m, installation during rain is practically impossible, since the cable slips through the sleeve.

2. Mounting the optical cable using tension clamps. Tension (anchor) clamps are used for rigid cable fastening, they are used both on rotary, branch, end sections of installation, and along the entire length of the route.

Tension anchor clamps AN-250(500,700,800), AC 6(7), PA 06(07),

Anchor clips can be used with both "8" and self-supporting cables. Clamps for suspension of cables with a steel cable support element allow you to quickly install the cable, without stripping and separating the load-bearing element. A plastic loop on the clamp cable provides insulation to the carrier in the event of a short to ground on the support. It is NOT recommended to use such clamps when installing a cable with a steel wire strength element; with a long-term load, the teeth of the wedges begin to slip along the smooth wire, which leads to cable damage.

Tension spiral clamps.

Tension spiral clamps are used for mounting self-supporting cables (ADSS) on power transmission poles, power poles, lighting, railway contact network. The fastener consists of a protector, a loop-shaped power spiral coated with a special abrasive and a thimble.

3. Installation of optical cable by the method of combined suspension.

The combined suspension method is widely used when using clamps PPO, SC30\34. The essence of the method is the alternation of supporting and tension (anchor) clamps. In this way, it is possible to increase the reliability of the line and reduce construction and operation costs. The optimal ratio is 4 support to one tension clamp.

lanset.ru

The technology of mounting the SIP-3 wire on the supports of VL 6-10kv.

The length of VL-6-10-20kv made with SIP-3 wires is growing every year. Such lines are called VLZ for short - which means overhead lines with protected wires. Do not confuse with VLI-0.4kv - overhead lines with insulated wires, where SIP-1, SIP-2, SIP-4 are used for low voltage 220V-380V.

It is the middle voltage class 6-10 kV that accounts for the bulk of emergency shutdowns. Old power lines-6-10kv made with bare wires are primarily affected by weather factors such as wind and ice. And the use of self-supporting wires with protective insulation can significantly improve the characteristics of their safety and reliability.

When using SIP-3, several parameters are reduced at once:

space when laying out distribution units in a substation

All this is very beneficial from an economic point of view.

Technical specifications and characteristics (section, rated current, short-circuit current, diameter, weight) high voltage wire SIP-3:

More data - current, active, inductive resistance, voltage drop

The quality of the VLZ certainly depends on the quality of the wires used, but it also equally depends on the fittings used. When using proven materials, it is possible to build a maintenance-free overhead line with a service life of more than 40 years.

The SIP-3 wire can be mounted both on new supports and on existing ones, instead of bare AS-50-70-95-120 wires. Naturally with the replacement of all bearing, mounting fittings and insulation. Replacing the old VL-10kv with a new VLZ with SIP-3 wires is called reconstruction.

Both reconstruction and new construction are necessarily carried out according to the project.

Most often, the installation of a new VLZ begins with the installation of anchor supports. Even before lifting the anchor support rack, on the ground, they fix it on it required amount traverse.

To prevent corrosion, and because the line must be maintenance-free, galvanized traverses must be used. Otherwise, after a few years you will have to re-climb each support and repaint the faded traverses to protect against rust.

The traverse is immediately grounded. This is done by connecting with a ram clamp and a steel bar with a diameter of at least 10mm (section 78.5mm2) to the ground outlet on the top of the support.

On reinforced concrete supports, both welded and bolted connections are allowed. On wood, it is recommended to use first of all dies.

On multi-rack anchor supports, the number of grounding runs must be at least two. As such, you can use elements of longitudinal reinforcement of reinforced concrete racks SV-105-110.

All metal structures here (strut mount, traverse itself) are grounded from above, through a ground outlet. It is not required to make a separate descent made with a rod or a strip, directly along the body of the support to the ground.

It is advisable not to wind the insulators on the traverse on the ground until the support is installed, in order to avoid accidental damage and damage during installation by special equipment. A partially equipped rack is installed using a truck crane or a boring crane machine in desired point.

Then one or two struts are mounted. Their number depends on the route scheme and is determined by the project.

The support must be buried at least 2.3-2.5 meters deep. After that, intermediate supports are mounted.

When all the supports are exposed, you can proceed to install insulators on them. And here you can use both traditional porcelain insulators ShF-20, and insulators of the new generation IF27 with a special plastic sleeve.

IF27 is more convenient to install and allows you to roll out the SIP-3 wire without mounting rollers. The insulators are mounted on the pins of the traverses or on the hooks of the supports using plastic caps KP-22.

However, it is not necessary to use modern brands of insulators everywhere. For example, on anchor supports for VLZ lines with SIP-3, the old time-tested glass insulators PS-70E, assembled in garlands of at least 2 pieces, have proven themselves very well.

Specifications insulators from Ensto, Sicam, Niled for SIP-3:

After installing the insulators, they begin to roll out the wire. The simplest rolling and installation is carried out directly along the troughs of the IF27 pin insulators.

If simple ShF-20 insulators are used, then you will need rolling rollers, which must be installed on the traverses of the intermediate supports.

A power roller of a slightly different design with a bandage tape is fixed on the initial anchor support. If there are no loops or a hook on the intermediate traverses for which it would be possible to hang the roller, then devices with a bandage tape are used everywhere.

Specifications and brands of mounting rollers from Ensto, Sicam, Niled, KBT:

In front of the very first support, a drum with SIP-3 wire is installed on a cable trolley or on a cable jack.

Rolling from the drum must be carried out in such a way as to prevent contact with the earth wire and the pillars. For this, a leader rope is used. It must be made of synthetic rope with a minimum diameter of 6mm.

A standard drum from Ensto ST204.2060-0030 can easily fit 1100m of this cable.

The main requirements for the rope:

low susceptibility to stretching

resistance to ultraviolet and moisture

If the length of the cable is insufficient, then it can be spliced together with special connecting brackets.

The motor winch ST204 is fixed on the final anchor support. A drum with a rope leader is placed on it.

The motor winch provides ease of installation, several times reduces the total operating time.

The portable rolling machine is installed using a belt or chain banding device.

The leader cable is first pulled through the mounting roller on the final support, and then sequentially through the intermediate supports, dragging it along the grooves of the pin insulators.

Roll SIP-3 directly over the insulators on intermediate supports possible if the angle of rotation of the track does not exceed 15 degrees.

The rope stretched through the entire anchor section is connected to the wire with the help of a mounting stocking. The leader rope is simply tied in a compact knot directly to the loop of the mounting stocking. At the same time, unlike SIP-4 low voltage wires, it is not necessary to use a swivel for SIP-3.

The edge of the stocking is wrapped with turns of electrical tape to prevent it from slipping.

One of the installers on the radio gives a command to another, who controls the winch, to turn it on. He must also constantly monitor the passage of the cable-to-wire connection along the entire line. And if the wire gets stuck, immediately give the command to stop the winch.

It is necessary to stretch the SIP wire evenly, without jerks, at a speed of less than 5 km / h. When rolling, do not allow the wire to touch the ground and the pillars of the supports.

When the SIP-3 has passed through the last power mounting roller on the end anchor support, the winch is stopped. The end of the wire is fixed in an anchor wedge, eg DN Rpi or SO255.

Specifications and brands of anchor clamps from Ensto, Sicam, Niled:

Piercing clamp for electrical connection cable loop with wire, installed later, after the final tension of the line.

The fitter on the support removes the wire from the mounting roller and disassembles the connection unit with the rope leader. Now you need to stretch and at the same time adjust the tension of the wire. This should be done with the obligatory use of a dynamometer in accordance with the mounting tables. You can download it from here (from page 13).

The method of adjusting the tension of the SIP without a dynamometer, focusing only on the sag, is not entirely correct.

The error in this case can reach significant values. Everything will depend not on the instruments, but on the eye of a particular fitter. The human factor will play a significant role here, which is not at all correct.

The wire must be pulled with a hand winch from the side of the cable drum.

To do this, a little wire is wound from the drum, a mounting frog is fixed on it, to which, in turn, a dynamometer is attached. And already the hook of a manual winch clings to it.

The other hook of the winch is hooked to a secure anchor on the ground. It can be used as a bumper truck.

Exceeding the tensile force of the wire should be no more than 5% of the value indicated in the installation table.

After pulling the SIP-3, the electrician on the support anchors the wire wedge clamp.

Then immediately installs a branch piercing clamp with a cable for output electrical potential wires to the clamp body. This is done to reduce the level of radio interference created by the VLZ and to prevent damage to the insulation of the SIP itself.

After that, you can cut the wire on the support in the right place, leaving the necessary margin and a loop for further connection or connection with another SIP-3, or VL, CL 6-10kv.

The rolling and tensioning of the second and third wires is carried out in a similar way.

Now you need to fix the wires on the intermediate supports. To do this, the plastic sleeve on the insulator is rotated so that the slot moves and the SIP-3 is deafly closed on all sides.

Fasteners are made with spiral knitting.

They are mounted in 2 pieces for each insulator, on one side and the other from the traverse.

To choose the right spiral knit, consider the following two parameters:

The dimensions of the bindings corresponding to a certain cross-section of the wire, for most manufacturers, can be determined by color coding.

Technical data for spiral binders from Ensto, Niled, Sicam, KBT:

Regular conductors aluminum wires brands such as A-50, A-70 are prohibited here! Spiral knits have a special polymer coating, designed to protect the insulation of self-supporting insulated wires from mechanical damage.

On this, the direct installation of SIP-3 wires can be considered completed. It remains to place lightning protection means, switching and other equipment on the supports, followed by voltage supply from the power source.

Routing for installation of wires SIP-3 - download

domikelectrica.ru

Hello, Dear readers of the site site. Today I want to talk about attaching the cable to the support when it is lowered into the trench. A variety of special devices are produced for attaching the cable to the support, and the connection of the cable to the overhead line is regulated by a number of regulatory documents. That is what this article will be about.

Here I would like to dwell on the established bending radii of pipes when laying electrical cables in them.

When bending pipes, the bending angle and bending radius are normalized. The bending angle of metal pipes for laying electrical cables in them is standardized at 90 °, 120 ° and 135 °. The bending radius directly depends on the cross section of the electrical cable, and, accordingly, the diameter of the pipes for electrical wiring. See figure for bending radii.

The overhead line CIP wire is attached to the support with an anchor tension clamp (8). The anchor tension clamp is fixed with a loop on the anchor bracket.

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The cable descending into the trench has metal protection and armor. The most popular cable for laying in trenches is VBBSHV. The metal cable protection must be grounded. (PUE, ch.2.4) To do this, the PEN conductor of the overhead line is connected to the flat clamp (4) and the ground wire using a piercing through clamp (7).

All fastenings to the support are made with mounting crimp tapes (2). The crimp tape is tightened with a special clamp (lock) (3).

The place of cable section and stripping of armor and insulation is protected by a heat-shrink cuff, a “glove” (6).

1. Anchor bracket;
2. Crimp mounting tape;
3.Skrepa for fastening the mounting tape;
4. Flat clamp for connecting ground wires;
4a. Earthing wire armored cable coating;
5. Heat-shrinkable protective cuff, "glove";
6.Clamp, piercing through passage with a branch. Connects the PEN conductor to the ground wires;
7. Anchor tension clamp for SIP wires;
8. Bandage cable strap; Insulating cap;
9. Protective cap for wire;
10. Metal corner to protect the cable to the pipe.

There are many types of cable attachment to a support on sale when descending into a trench, but I described the principle of lowering and attaching a cable to a support above.