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Main Features
of the YFD Prefabricated Branch Cables
·Electric resistance of insulating sheath≥200MΩ;
·Power frequency voltage resistance≥3.5KV/5min;
·Excellent airtight and waterproof properties make them meet the above
two articles well in water；
·Small resistance of the branch joint, i.e. the ratio of it to that of
the branch of the same length ≤1.2；
·Large intensity of short circuit, i.e. the ratio of the short circuit
resistance to the normal resistance ≤0.2；
·As to the ZR-YJV combustionproof prefabricated branch cable, the self-extinguishing
time of its sheath ≤12S；
·The NH refractory type can work 90 minutes normally in combustion environment；
·The VV type cable's copper core can work in 70 degrees celsius at most;
the YJV type cable's copper core has excellent heat stability and anti-aging
property.
·The YJV type prefabricated branch cable has excellent heat stability
and anti-aging property.
Prefabricated Assembled Branch Cable's Application
·Highrise buildings；
·Disaster-fighting equipment；
·Tunnel illumination；
·Replace medium and small capacity copper busbars on some occasions.
Standard for Prefabricated Assembled Branch Cables
IEC60502 for 1~30KV press-wrapped insulated power cable and its fittings
GB/T 12706 for 1KV~35KV press-wrapped insulated power cable and its fittings
JCS376 for branch cables
JISC2810 for indoor wiring connecting tubes
The Q/YQL enterprise standard for prefabricated branch cables of Richbridge
Wire & Cable Co., Ltd.
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Merits of the YFD Prefabricated
Branch Cables
Excellent stability in power supplying
·The trunk cable contains no joint and is thus susceptible to less malfunction
points；
·The branch joints conform to strict technical standards and inspection
requirements and are subject to rigorous quality control system；
·The branch joints are manufactured fully by machines, which reduces
quality fluctuation due to the human factor；
·The branch joint structure is proper made with LYZ technique, featuring
small contact resistance not affected by heat expansion and cold shrink；
·The sheath is formed within a short time, avoiding influence to the
contanct resistance due to long time exposure of the joint contact core
in air.
Obvious Reduction of Power Distribution Cost
·Many sorts and specifications for selection and free combination；
·The branch joints can be located on any floor on demand；
·Compared with the busbar trough, it can not only reduce project cost,
but also raise comprehensive economic benefits；
·The sections of the trunk cables vary from 10mm2 to 1200mm2, and of
the branch cables vary from 10mm to 95mm；
·Many types for selection, viz. VV,ZR-VV,NH-VV,YJV,ZR-YJV,NH-YJV, etc.
Low Requirements to Installing Environment
·Low requirements to environment of usage and precision of installation；
·Because of its small bending radius, the difficulty of installation
is greatly reduced；
·Small floor space required；
·Simple and convenient installation which requires only a winch and a
short period
1/10 or 1/20 that of the busbar trough installation.
Excellent Resistance against Earthquake, Airtight, Waterproof and Fireproof
Properties
·Good airtight and waterproof properties that ensure its normal power
supply in humid environment, in open air or underground；
·The “NH” type prefabricated branch cable can ensure 90 minutes of
normal power supply on combustion；
·Excellent resistance against earthquake. The ordinary joints for busbar
troughs will loosen after shake on the wall, but the YFD series prefabricated
branch cables won't be affected, in particular, no measure need be
taken on descending of the building.
Maintenance Free
·High rate of once success of operation after the cabes are installed
regularly；
·No maintenance is needed for the cables in regular operation.
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