Self-supporting insulated wire is a new generation of cable and wire products. It is used in networks of 0.4, 1 kV, 6-35 kV:

• highway construction;
• linear branches;
• construction of inputs to residential and administrative buildings.

General view of the SIP cable

Structure

SIP - twisted wire made of aluminum conductors coated with light-stabilized polyethylene increased strength not sensitive to action ultraviolet rays. The shell is painted black. In conjunction with zero is a steel bearing element, aluminum wires are located around.

The structure of the SIP cable: 1 - conductive element; 2 - steel core; 3 - polyethylene sheath

• Phase cable. Made of aluminum (aluminum and steel core for SIP-3). round shape. The number of aluminum wires is standardized by the specifications for the manufacture of each brand. Electrical resistance complies with current GOSTs.
• Bearing vein. It has a round shape and is made from aluminum alloy. Absent in SIP-3, SIP-4 and SIP-5.
• Device. Phase wires twist around the zero core. The direction of movement is clockwise.
• Shell. Made of light stabilized cross-linked XLPE (SIP 2, SIP-3, SIP-5) or thermoplastic polyethylene low pressure LDPE (SIP-1, SIP-4) .
  

• SIPn - the use of materials for insulation that do not support combustion;
• SIPg - the use of water-repellent materials;
• SIPng - "cross-linked polyethylene" with the introduction of water-retaining materials that do not support combustion.

SIP is used in power lines with radial circuits. The technical solution is a cheaper and high-quality alternative to bare-wire overhead power lines and cable lines laid on a cable.

SIP-X decoding:

• C - self-supporting.
• And isolated.
• P - wire.
• X - 1(1A), 2 (2A), 3, 4, 5

Suspension elements

When erecting VLI, fittings from various manufacturers are used.

For a four-wire system use:

• Tension clamps.
• Support clamps. Apply for intermediate fastening on the supports. Clamp bodies are made of corrosion-resistant materials.
• Several types for connecting isolated aluminum wires with aluminum, copper and SIP.
• Flat clamps. Necessary for interconnecting bare and insulated conductors.
• Other fittings: cable lugs, busbar clamps, components for the lighting network (overvoltage surge arresters, fuses), fittings for laying SIP on building facades (remote clamps, wall hooks, multi-brackets), hooks and brackets for mounting on supports, hand tools.

The choice of fittings depends on specific typical recommendations.

VLI is built on wooden and reinforced concrete supports. Benefits given wooden materials, because their service life is more than 100 years, when such lines are dismantled, the supports are suitable for subsequent use. Widely used in domestic networks reinforced concrete racks due to their low cost relative to wood.

Deciphering the types of SIP

According to GOST R 52373-2005, there are several types:

• SIP-1 - cable with an uninsulated bearing element;
• SIP-2 - bearing element in an insulated shell;
• SIP-3 - designed for 6-35 kV networks, protected insulation;
• SIP-4 - cables without load-bearing element;
• SIP-5 - each core contains a steel element.

Advantages of SIP

• reducing the cost of construction;
• stable operation of overhead power lines, no wire lashing and breaks;
• maintenance of VLI under voltage. New consumers can be connected without disconnecting the feeder;
• full insulation of cores;
• reduction of the security zone;
• light weight of the wire;
• joint suspension of 4 chains on a support;
• reduction of dimensions between high-voltage lines and self-supporting insulated wire;
• ease of maintenance;
• reduction of electricity theft;
• the possibility of using lightweight reinforcement;
• simplification of the construction of cable inserts;
• reduction of voltage losses at the end point of the line;
• frost resistance;
• the possibility of using anti-snow and anti-icing devices on the lines;
• the possibility of laying wires along supports, fences and facades of buildings (in accordance with the norms of the PUE);
• reduction of construction time;
• lower operating costs. With quality design solutions, maintenance costs can be reduced by up to 80%;
• stable operation in any weather - these brands can be used in areas with a cold climate without the use of additional protective equipment;
• increase in the service life of the line (low weight of self-supporting insulated wire and fittings increase the service life of supports);
• reduction in the number of accidents from electric shock.

• Execution of SIP 1, 2, 3 according to GOST 15150.
• The polyethylene sheath is UV resistant.
• The minimum bending radius is 10d.
• The service life of the overhead transmission line is at least 40 years.
• Warranty period - 3 years.
• The cable is labeled for each core.

See the table below for details.

brand
Cross section of conductors, pcs.	16..120	16..120	35..240	16..120
Number of conductive wires, pcs.	1..4	1..4	1	2..4
Zero conductor material		aluminum alloy and steel core	-	-
Conductor material	aluminum	aluminum	aluminum alloy and steel core	aluminum
Operating voltage, kV	0,4..1	0,4..1	10..35	0,4..1
Core insulation material	Thermoplastic PE	Light stabilized PE		Thermoplastic PE
Maximum allowable overheating, 0C	+70	+90	+70	+90

Brand SIP-1, SIP-1A

Decryption:

• SIP-1. Phase wires are insulated from light-stabilized PE, the carrier core is bare;
• SIP-1A. All elements are sheathed in light stabilized PE.

The design of the cable brand SIP-1A

1. Phase cable.
2. Bearing vein.
3. Steel core.
4. Shell.

Peculiarities:

• the conductive core is made of stranded aluminum, cross section 16-120 mm 2 ;
• zero cable made of aluminum alloy with a supporting element made of steel, section 25-95 mm 2;
• sheath - "cross-linked polyethylene";
• operating voltage 0.6/1 kV;
• frequency 50 Hz;
• execution type I and II.

Area of ​​use:

• construction of highways and linear branches;
• building entry device.

brand

Decryption:

• SIP-2. Multicore insulated cables. The zero core contains a steel element, it is a bare cable.
• SIP-2A. Cables with insulated conductors.

Design areas:

SIP-2, SIP-2A is designed to carry out inputs into buildings, construction of VLI on the coasts of the seas, in regions with a cold climate, salt lakes, in places with a polluted atmosphere.

Cable brand SIP-2A

Peculiarities:

• operating voltage - 0.6; 1 kV;
• network frequency - 50 Hz;
• atmospheric version - type II and III;
• delivery - in drums.

Brand SIP-3

Single-core steel-aluminum insulated cable with protective insulation made of "cross-linked polyethylene".

Design:

• cable - multi-wire power cable, made of compacted aluminum alloy, contains a steel core. Cross section 35-240 mm 2 .
• shell - "cross-linked polyethylene" type

The structure of the SIP-3 cable: 1 - bearing element; 2 - aluminum wires; 3 - shell

Peculiarities:

• operating voltage 10, 15, 20, 35 kV;
• the declared service life is at least 40 years;
• execution according to GOST 15150 II and III.

Purpose:

• construction of main sections and power transmission taps in 10-35 kV networks;
• connection of equipment to overhead transmission lines (disconnectors, reclosers, metering points, etc.);
• laying routes in areas with a difficult environmental situation;
• installation of power lines near the seas, saline sands, salt lakes.

Brand SIP-4

SIP-4 - power cable without a separate carrier core. Sheath made of cross-linked polyethylene.

General view of SIP-4

Specifications:

• operating voltage 0.6; 1 kV;
• frequency 50 Hz;
• execution in accordance with GOST II and III.

Design features:

• phase conductors - aluminum from fine wire, compacted; section 16-120 mm 2;
• sheath made of light-stabilized thermoplastic polyethylene.

Application area:

• installation of branches to buildings;
• construction of highways and linear branches;
• input to metering devices;
• construction of power lines in regions with severe winters.

Brand SIP-5

SIP-5 - stranded power cable, without bearing element. The current-carrying elements are made of aluminum, the sheath material is cross-linked polyethylene.

General view of the SIP-5 cable

Purpose:

• highways and linear branches to VLI;
• branch device.

SIP testing

1. Polyethylene breakdown test (for protected wires): for a voltage of 20 kV it is at least 24 kV, for networks of 35 kV - at least 40 kV under power frequency conditions.
2. AC insulation test:
   • for a voltage of 0.4 kV - is 4 kV;
   • for 20 kV, the value is 6 kV;
   • for 35 kV the value is 10 kV.

Fixing the four-wire VLI-0.4 on the SV rack

1. Steel tape.
2. Clip for bandage tape.
3. Hook.
4. Plain clamp.
5. Collar.
6. Hook.
7. Tension clamp.

Dismantling the cable. Video

How the SIP cable is dismantled can be found in the video below.

Self-supporting insulated wires are best solution for the construction of modern power lines. High performance, low construction cost and minimum costs personnel for line maintenance made SIP one of the leaders in cable and wire products. The introduction of insulated new cable brands has reduced the number of accidents and emergency shutdowns household consumers.

The SIP-4 4x16 wire is a self-supporting, insulated cable equipped with four current-conducting aluminum elements with an area of ​​16 mm 2. Light-stabilized cross-linked polyethylene is used as the main insulating layer. The main purpose of the conductor is the installation of power lines. The high popularity of the product is due to excellent technical specifications. Most often it is used when connecting individual consumers, premises and construction sites.

Wire benefits include:

• long uptime;
• the ability to operate at temperature extremes and in an aggressive environment;
• its installation can be carried out without disconnecting the line;
• resistance to mechanical stress.

OKPO: 355332.

Decryption

Peculiarities

The conductor can only be connected in loops and on supports; connections in spans are unacceptable. This is due to the overspending of the material, because. the remaining pieces of cable are almost impossible to use. When under load, it is difficult to separate the individual cable cores. The wire also creates certain inconveniences when arranging connecting, branching and anchor clamps.

The maximum length of the strip without additional supports is 40 m for a two-core conductor with a cross section of the current-carrying part of 16 mm 2. This narrows the scope of the product. It is impossible to establish which of the cores is intended for laying "zero", because all conductive elements have the same cross section and are made of aluminum wire. Self-supporting insulated wire SIP-4 4x16 is not equipped with reinforcing elements designed to protect against breakage due to heavy ice and other loads.

When installing anchor and suspension reinforcing elements, tools such as a torque wrench and a mounting clamp must be used. With their help, the line is tensioned. During operation, the load may be unevenly distributed over the cross section of the aluminum core. This allows a more heated core to transfer heat to less heated ones, but at the same time, the specific elongation of the warmest part will be greater.

The consumer, in order to reduce the risk of failure of the wire, supports and fittings, provides for the possibility of primary destruction separate parts anchor and suspended reinforcing elements.

Application

Wire construction

1. The conductive core is made of aluminum according to GOST SIP-4 4x16, the cores can be round or sector-shaped, consist of several wires, the bundle of which is compacted. The core for laying "zero" is made of an alloy of aluminum and another metal, has a round shape and consists of round wires.
2. The insulating coating of all four cores is represented by cross-linked polyethylene (PEX), the material is light-stabilized. Reliable manufacturers use polymers such as the Austrian Borealis Visico LE4421 / LE4472 or the English Ael Compounds Sioplas-type compound 523/493.
3. Twisted bundle of coated wires insulating layer, winds on a core designed to connect the zero phase. She is a carrier. The twist turns to the right.

Specifications

Technical characteristics of SIP-4 4x16 are presented:

Normal operating conditions allow exposure to ultraviolet radiation, precipitation and temperatures of +70 degrees.

Overall weight and mass

Price

You can buy a cable from us at a low price without sacrificing quality. We work with proven factories that have been gaining a reputation as a reliable manufacturer for decades. In addition, we are responsible for the goods provided by our company, therefore, before sending the order, we must test cable and wire products.

To 4x16, you need to fill out a form on the site or send us a request by e-mail. After that, our employees will begin to draw up a profitable commercial offer. You can buy a cable from the existing range or make a pre-order. We will contact the manufacturer to ensure the lowest cost. Our company sells products wholesale and retail, works with individuals and legal entities.

The price of SIP-4 4x16 wire depends on the volume of the order, current promotions and special offers, delivery method and a number of other factors. For each client, it is determined individually. For regular customers discounts are provided.

C - self-supporting

I - Isolated

P - Wire

1 - Type of construction: self-supporting wire with aluminum phase current-carrying conductors, with XLPE insulation, with zero carrier NOT ISOLATED

2 - Type of construction: self-supporting wire with aluminum phase current-carrying conductors, with XLPE insulation, with zero carrier ISOLATED residential aluminum alloy for a voltage of 0.66/1 kV.

3 - Type of construction: self-supporting wire with an aluminum alloy core with XLPE insulation for a voltage of 10, 15, 20, 35 kV.

4 - Construction type: self-supporting wire with four aluminum phase conductors, with 0.66/1 kV XLPE insulation.

5 - Type of construction.

Description and application of SIP wires

The radial distribution scheme from 10/0.4 kV step-down transformer substations is mainly used, which is built using self-supporting insulated wires suspended on wooden supports. This system was developed by Finnish network companies together with equipment manufacturers in the 60s as an alternative to traditional bare wires and cable lines suspended on ropes.

In Finnish networks mainly SIP system is used, consisting of three insulated phase wires wound around an uninsulated neutral carrier wire. Conductor insulation made of polyethylene high pressure LDPE (low density polyethylene) or XLPE (cross-linked polyethylene). Hanging such wires requires hooks, support clips, anchor clips, and piercing clips. Overhead lines are mainly mounted on wooden poles (impregnated wooden poles are used in electrical networks over a hundred years. Service life of a well-made wooden support exceeds normative term airline services in general. In Finland today more than 7 million wooden poles are installed and in operation).

Networks 0.4 kV are three-phase, four-wire. The line consists of 1-5 insulated wires wound around an aluminum alloy carrying conductor. The carrier conductor is used as the neutral wire, either bare or insulated. The neutral wire is grounded at the transformer substation and at the end of each branch or line longer than 200 m or at a distance of not more than 200 m from the end of the line or branch where the load is connected.

Construction of SIP wires

Self-supporting insulated wires, unlike non-insulated wires, have an insulating polyethylene coating on phase wires and, depending on the modification, have or do not have a similar coating on the carrier neutral wire. In addition, there is a type of SIP without a carrier wire, in which all four wires are insulated. All three SIP systems are equal today, since they are equally widespread in dozens of countries.

SIP wire grades

• SIPT-1 (SIP-1) - all cores, with the exception of the zero carrier core, have an insulating cover made of thermoplastic light-stabilized polyethylene;
• SIPT-2 (SIP-1A) - all cores, including the zero carrier core, are insulated;
• SIP-1 - cores, with the exception of the zero carrier core, have an insulating cover made of thermoplastic light-stabilized polyethylene;
• SIP-2 - cores, with the exception of the zero carrier core, have an insulating cover made of cross-linked light-stabilized polyethylene (polyethylene with cross molecular bonds);
• SIP-2A - all cores, including the zero carrier core, have an insulating cover made of cross-linked light-stabilized polyethylene (polyethylene with cross molecular bonds);
• SIP-3 - a single-core wire in which the conductive core is made of a compacted alloy or a compacted steel-aluminum wire structure and has an insulating cover of cross-linked light-stabilized polyethylene;
• SIP-4 - all cores have an insulating cover made of thermoplastic light-stabilized polyethylene (there is no separate carrier core);
• SIP-5 - all cores have an insulating cover made of cross-linked light-stabilized polyethylene (polyethylene with cross molecular bonds). The wire may consist of 2 or more cores. In the design of the SIP-5 wire, there is no separate carrier core.

Technical characteristics of SIP

Rated voltage SIP-1, SIP-2, SIP-4: 0.66/1 kV; SIP-3: up to 10 or 35 kV

SIP-4 - self-supporting wire with aluminum phase conductive conductors (without a carrier conductor), with insulation from thermoplastic light-stabilized polyethylene. Operating voltage: up to 0.6/1 kV with a frequency of 50 Hz.

Operating temperature: -50 ÷ +50 °С.

Mounting at temperature: not lower than -20 °С.

Service life for a cable: not less than 45 years.

Warranty period: 5 years.

At an attractive price. It is also possible to purchase minimum lots from a warehouse in Moscow. Trading House "Cable-Resource" directly cooperates with the largest Russian factories and guarantees high quality all offered products. We produce prompt unwinding of SIP4 cable from a warehouse in Moscow. We carry out complex acquisition of cable-wire and electrical products for construction projects.

Device

Stranded conductive conductors of the wire, their number in the SIP4 varies from 2 to 7, are made of aluminum;
their insulation is made of polyethylene (cross-linked, light-stabilized, weather-resistant thermoplastic or a composition with reduced flammability). The cross section of the phase and carrier (zero) cores can reach 240 mm2.

Purpose and operating conditions, technical characteristics

Self-supporting applications insulated wire grade SIP 4 - the creation of branches from power lines to inputs to buildings, as well as laying along walls.

SIP 4 wire is intended for operation as part of power lines alternating current a frequency of 50 Hz with an upper voltage limit of 2.5 to 4 kV. Manufacturers provide a fairly wide temperature regime operation – from -60 to +50°С; laying should be carried out at an air temperature not lower than -20°C. It is allowed to use a self-supporting insulated wire in areas of industrial development and areas of saline sands and rivers, on sea coasts. Core marking is carried out in accordance with the requirements of GOST 18690-80 and 52373-2005 in the form of color or digital designations.

Advantages of SIP-4

The advantages of self-supporting insulated wire SIP-4 are due to the peculiarities of their design, in particular, the use of insulation. These benefits include:

• the possibility of reducing the width of clearings when laying in forest areas, the almost complete elimination of the risk of fires when the wire falls;
• reduction in the dimensions of the suspension, which, in turn, provides savings on the material of the supports;
• reduction of operating costs associated with the absence of the need for systematic clearing of routes;
• exclusion of the possibility of a short circuit (both between phases and to ground).

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SIP-4 wire self-supporting insulated for power lines

SIP-4 wire self-supporting insulated for power lines

This section of our catalog contains group of wires SIP-4 self-supporting insulated for power lines, from 17 items.

SIP-4 - these are wires without a carrier component, structurally look like a bunch of protected wires combined into a common core. The current-carrying conductors (phase and zero) are made of aluminum and have the same cross section. The number of cores can be 2, 3, 4. The insulation is made of thermoplastic light-stabilized polyethylene. They are operated at a nominal voltage of 0.6/1kV at a frequency of 50 Hz.

In accordance with GOST R 52373-2005, SIP-4 can be used in power supply networks only for input to houses, installed along the walls of buildings and structures.

GK Elektrokabel - tested and reliable supplier. The presented production has all necessary certificates. We sell SIP-4 in bulk from a warehouse in Moscow. Leave a request, and we will promptly offer you a suitable commercial offer. Depending on the volume and conditions of the order, the price of the products is determined. We look forward to collaborating.

Attention! We sell products in bulk. We accept orders for from 20 thousand rubles. Delivery in Moscow and up to 10 km from the Moscow Ring Road is free of charge.