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Delivery is carried out as soon as possible after the order is placed.
Cables for signaling and blocking with polyethylene insulation of the brands SBVG, SBPu, SBZPu (without armor), SBVGE, SBVGEng(A) (with shield), SBZPBBShp, SBVBBShvEng(A), SBVBBShvng(A) (in tape armor), as well as trunk cables of the brand MKSPZPu (without armor), MKSPZBBShp (with armor) are designed for electrical installations of signaling, centralization, blocking, fire alarm, and automation systems with a nominal voltage of 380 V alternating current at a frequency of 50 Hz or 700 V direct current.
Cables can be used for installation in channels, tunnels, in collectors, in plastic pipelines, in the ground, and in aggressive environments, provided the cable is not subjected to significant tensile forces, for protection against external electromagnetic interference. Cables with hydrophobic filling can be used in conditions of increased humidity. Cables with a low-flammability polyvinyl chloride (PVC) sheath can be used in conditions of group installation.
Signaling and blocking cables (SB…) are made with conductors made of soft copper round wire with a nominal diameter of 0.8 mm, 0.9 mm, or 1.0 mm. Trunk signaling and blocking cables (MK…) are made with conductors made of soft copper round wire with a nominal diameter of 0.9 mm, 1.2 mm, or 1.4 mm.
The number of pairs in signaling and blocking cables ranges from 1 to 30.
The number of conductors ranges from 3 to 61.
*By agreement with the customer, cables with a different number of pairs or conductors may be manufactured.
The number of pairs and quadruples in trunk cables ranges from 1 to 40.
The number of conductors ranges from 3 to 42.
*By agreement with the customer, cables with a different number of pairs, quadruples, or conductors may be manufactured.
The conductive conductor is insulated with a polyethylene layer in the form of a continuous concentric layer.
In cables with hydrophobic filling, polyethylene compatible with the hydrophobic filler is used.
In twisted pair cables, conductors with significantly different insulation colors must be twisted into a pair with a unidirectional twist with a pitch of no more than 100 mm or with a bidirectional twist with an average pitch per twist period of no more than 100 mm.
Single conductors or pairs are twisted into elementary bundles or a core with unidirectional (helical or bundle) or bidirectional twisting.
In unidirectional helical twisting, conductors or pairs, regardless of their number, are twisted into the core with concentric helical turns.
| Conditional pair number in elementary bundle or core | Designation and coloring of conductors in the pair | |
| a | b | |
| 1 | White (natural) | Blue (cyan) |
| 2 | Orange (yellow) | |
| 3 | Green | |
| 4 | Brown | |
| 5 | Gray (black) | |
| 6 | Red | |
| 7 | Red | Blue (cyan) |
| 8 | Orange (yellow) | |
| 9 | Green | |
| 10 | Brown | |
| 11 | Gray (black) | |
| 12 | Red | |
In cables with quadruple twisting, four insulated conductors of different colors are twisted into a star-shaped quadruple with a unidirectional twist with a pitch of no more than 100 mm or a bidirectional twist with an average pitch per twist period of no more than 100 mm.
| Conductor number | Conductor color |
| 1 | Yellow |
| 2 | Brown |
| 3 | White |
| 4 | Green |
Core
Conductors, pairs, or quadruples are twisted into the core or elementary bundle. Elementary bundles are twisted into the core. In each turn of the core, which is twisted from elementary bundles, there is a counting and guiding element, with the elementary bundles distinguished from each other and the remaining bundles by the color of the binding threads or tapes.
In waterproof cables of the “Z” type, the free space of the core is filled with hydrophobic filler. In the MKSPVBBng(A)-LS cable, a longitudinal or spiral tape made of water-blocking material is applied over the core of the cable. The core of the cable with water-blocking tapes or hydrophobic filler must be waterproof.
Over the core of the cable, a belt insulation made of polyethylene terephthalate tape is applied with an overlap. By agreement between the manufacturer and the consumer, a screen made of aluminum polymer tape may be applied over the belt insulation.
Screen
An aluminum polymer tape with a nominal aluminum layer thickness of at least 0.15 mm is applied longitudinally or spirally with an overlap of at least 15%. The aluminum polymer tape is applied with the metal side facing inward. A contact copper wire with a nominal diameter of 0.4-0.6 mm is placed under the screen.
Over the belt insulation or the screen of the cables, a sheath made of light-stabilized polyethylene is applied.
Sheath
– In SBVG and SBVBG cables – made of PVC plastic;
– In SBVGng, SBVBGng(A), SBVBBShvng(A), etc. cables – made of low-flammability plastic;
– In SBPB, SBZPB, SBZPBBShv, SBZPBBShp, MKSPZPu, MKSPZBBShp, etc. cables – made of polyethylene;
– In MKSPVBBng(A)-LS cable – made of low-fire-hazard PVC plastic, with reduced smoke and gas emissions.
Armor
Cables can have armor made of two galvanized steel tapes, and the armor may be applied in a locked configuration. By agreement with the consumer, steel tapes may be non-galvanized.
Outer sheath
An outer sheath (protective hose) – “Shv” or “Shp” – is applied over the armor, depending on the material of the cable sheath. If no specifications are provided in the order, cables are made with a black-colored sheath. The electrical parameters of the cables correspond to the values specified in Table 3.
Cable manufacturing by agreement with the customer:
– With meter marking on the cable sheath;
– With a different number of pairs, quadruples, or conductors;
– With a colored outer sheath (red, white, blue, or another color).
| Name | Specifications |
| Nominal voltage | 380 V AC at 50 Hz or 700 V DC |
| Electrical resistance of insulation during operation, recalculated per 1 km length at t=+20°C, minimum (DC) | – 4000 MΩ for cables without hydrophobic filler in the core; – 5000 MΩ for cables with hydrophobic filler in the core. |
| Electrical resistance of conductors, recalculated per 1 km length at t=+20°C, maximum (DC) | for 0.8 mm conductor – 36.6 Ω; for 0.9 mm conductor – 28.8 Ω; for 1.0 mm conductor – 23.3 Ω; for 1.2 mm conductor – 15.8 Ω; for 1.4 mm conductor – 11.9 Ω. |
| Test voltage between conductors, shield, and armor for 1 minute, (frequency 0.05 kHz) | 2500 V |
| Working capacitance, recalculated per 1000 m length, maximum (frequency 0.8 or 1.0 kHz): – for twisted pair cables – for cables with single conductors | 100.0 nF; 150.0 nF. |
| Attenuation coefficient for twisted pair cables, recalculated per 1000 m length and temperature 20°C, maximum (frequency 0.8 kHz): | for 0.8 mm conductor – 1.18 dB/km; for 0.9 mm conductor – 1.04 dB/km; for 1.0 mm conductor – 0.94 dB/km; for 1.2 mm conductor – 0.94 dB/km; for 1.4 mm conductor – 0.82 dB/km. |
| Transition loss at the near end between any pairs of twisted pair cables over a length of 300 m, minimum (frequency 0.8 kHz): – for 100% values – for 80% values | 60.0 dB; 62.0 dB. |
| Note: For other actual cable lengths (L), use coefficients: -10·1g (L/300) or -4.34·1n (L/300) | |
| Ambient temperature, upper limit | + 60°C |
| Ambient temperature, lower limit | – 50°C |
| Installation temperature, minimum | – 15°C |
| Minimum permissible bending radius of cables: | – 12 calculated outer diameters of the cable – for armored cables; – 10 calculated outer diameters of the cable – for unarmored cables with screen; – 7 calculated outer diameters of the cable; – for all other cables. |
| Service life of cables, minimum | 12 years – for cables without hydrophobic filling; 17 years – for cables with hydrophobic filling. |
| Warranty period, minimum | 4.5 years from the date of commissioning |
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