Key Features of the YFD Series Prefabricated Branch Cables
· Cable insulation ≥ 200MΩ;
· Power frequency withstand voltage ≥ 3.5kV/5min;
· Excellent airtightness and waterproofness: when the branch connector is immersed in water, the insulation resistance and power frequency withstand voltage measured between the water and the cable core meet the first two requirements;
· Low contact resistance of the branch connector: the ratio of contact resistance to the baseline resistance of a branch line of equal length is ≤ 1.2;
· High short-circuit resistance: the change in contact resistance ratio after a short circuit is ≤ 0.2;
· ZR-YJV flame-retardant prefabricated branch cables: self-extinguishing time of the sheath is ≤ 12s;
· NH fire-resistant cables: not only can supply power under normal operating conditions, but can also maintain normal operation for 90 minutes in the event of a fire;
· The maximum operating temperature of the copper core of the VV cable is 70°C, while that of the YJV cable is 90°C;
· The YJV prefabricated branch cable has excellent thermal stability and aging resistance. Prefabricated branch cables are used for:
· High-rise buildings;
· Disaster prevention equipment;
· Tunnel lighting and disaster prevention equipment;
· Replaces medium- and small-capacity copper busbars in various locations. Standards for Prefabricated Branch Cables
IEC60502 Extruded Insulated Power Cables and Accessories for Rated Voltages 1-30kV (International Electrotechnical Commission Standard)
GB/T 12706 Extruded Insulated Power Cables and Accessories for Rated Voltages 1kV-35kV (National Standard of the People's Republic of China)
JCS376 Branch Cables (Japan Cable Industries Association Standard)
JISC2810 General Rules for Wire Connection Pipes for Indoor Wiring (Japanese Industrial Standard)
Advantages of the YFD Series Prefabricated Branch Cables
Excellent power supply reliability
·The trunk cable conductors are jointless, ensuring excellent continuity and reducing points of failure.
·Branch joints adhere to strict technical standards and inspection requirements, as well as a rigorous quality assurance system.
·Branch joints are fully mechanized in the factory, significantly reducing quality defects caused by human error.
·Branch joints are structurally sound and manufactured using the advanced LYZ process, resulting in extremely low contact resistance and unaffected by thermal expansion and contraction.
·Sheathing is completed in a short period of time, avoiding oxidation of the steel core exposed to air for extended periods, which can lead to changes in contact resistance. Significantly reduces power distribution costs.
· Wide variety of specifications, flexible selection, and any combination possible.
· Branch joints can be positioned arbitrarily based on floor requirements.
· Compared to busbar ducts, this reduces construction costs. It also boasts high technical and economic indicators, resulting in significant overall economic benefits.
· Main cables range from 10mm² to 1200mm², and branch cables range from 10mm to 95mm in any combination.
· Wide variety of cable types, including VV, ZR-VV, NH-VV, YJV, ZR-YJV, and NH-YJV, available for selection as needed.
· Low installation requirements and easy construction.
· Low operating environment requirements and installation precision requirements.
· Due to its small bending radius, installation difficulty is significantly reduced, minimizing space requirements.
· Small footprint facilitates efficient use of building space and eliminates requirements for construction space.
· Simple and convenient installation, requiring minimal technical expertise. A standard winder is all that is needed, and installation cycle is short.
· Only 1/10 to 1/20 the labor required for busbar duct installation, minimizing installation labor intensity. Excellent seismic resistance, airtightness, waterproofness, and fire resistance
· Excellent airtightness and waterproofness enable normal power supply in humid environments and can be installed outdoors or underground.
· Utilizing "NH" type prefabricated branch cables, the system can maintain normal power supply operation for 90 minutes in the event of a fire.
· Excellent seismic resistance. While mechanically connected bus duct joints can loosen due to wall vibration, the YFD series prefabricated branch cables are not affected, especially when passing through building settlement joints. No precautions are required.
· When installed according to the specified method, the prefabricated branch cables achieve a high first-time commissioning rate.
· A properly functioning prefabricated branch cable system requires no maintenance. Prefabricated Branch Circuits
YFD Series Prefabricated Branch Cable Varieties and Models
YFD-YJV Cross-Linked Polyethylene Insulated Polyoxyethylene Sheathed Prefabricated Branch Cable
YFD-ZR-YJV Cross-Linked Polyethylene Insulated Polyoxyethylene Sheathed Flame-Retardant Prefabricated Branch Cable
YFD-NH-YJV Cross-Linked Polyethylene Insulated Polyoxyethylene Sheathed Fire-Resistant Prefabricated Branch Cable
YFD-VV Polyoxyethylene Insulated Polyoxyethylene Sheathed Prefabricated Branch Cable
YFD-ZR-VV Polyoxyethylene Insulated Polyoxyethylene Sheathed Flame-Resistant Prefabricated Branch Cable
YFD-WDN-YJV Cross-Linked Polyethylene Insulated Halogen-Free Low-Smoke Polyolefin Sheathed Fire-Resistant Prefabricated Branch Cable
