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Introduction of prefabricated branch cables
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1. Introduction of prefabricated branch cables  

Prefabricated branch cables One It is a new product of low voltage distribution system. The utility model has the advantages of safe and reliable power supply, excellent insulation performance, simple installation and installation, low cost of distribution, wide application scope, variety, low installation environment requirements, and convenient design. Compared with busbar, it has more functions, such as aseismic, waterproof, flame retardant and fire resistant, and avoids the cumbersome process in the installation and maintenance of busbar. It is an ideal replacement product for common cables and busbars.

Prefabricated branch cables are mainly used in high-rise buildings. They are also widely used in offices, hotels, hospitals, shopping centers, factories, mines, highways, tunnels, airports, bridges, cultural and sports venues, and other buildings and venues.

 

 

chart One Schematic diagram of prefabricated branch cable structure  

 

chart Two Schematic diagram of shape effect of precast branched cable  

2. Main features of prefabricated branch cables

Prefabrication According to the structural characteristics and power distribution requirements of each specific building, the branch cable will integrate the three parts of main cable, branch cable, branch connector and so on. It can be said that the precast branch cable is a professional product tailored for modern architecture and tailored. It has excellent technical and economic indexes. In terms of engineering economy, advanced technology and installation convenience, it has outstanding advantages over traditional cables and busbars. :

Two point one Good electrical performance

The branch cable connector is manufactured by factory, with short production time, good working environment, and reasonable manufacturing process design, so that the contact resistance is very small and very stable. The moulded joint manufactured by the special process has good tightness, waterproof, moisture-proof and corrosion resistance, even if it works in a harsh environment, it can ensure normal power supply.

Two point two High reliability of power supply

The branch cable main line adopts the entire cable without breakpoint in the middle, which not only reduces the hidden trouble of the main line, but also reduces the line loss, and the small joint resistance and good insulation performance, which greatly improves the reliability of the power supply and achieves the requirement of long-term maintenance free.

Two point three It has excellent seismic performance to ensure that the vibration caused by external causes during transportation, installation and operation will not affect the overall performance of the cable.

Two point four Provide a complete set of installation accessories, convenient for construction.

Two point five It is installed on the ground by pulling up the ground or putting down the roof. After the cable is in place, it can be fixed on the support according to the prescribed spacing. The installation is simple and reliable, and the installation environment is low.

Two point six Comprehensive economic benefits are obvious.

According to relevant information, the investment of branch cable is only for close bus investment. Thirty The installation time is only about 10%. 1/10 The cost of construction has been greatly reduced. With reliable operation and no need of any maintenance, the economic benefit is very obvious.

Two point seven Varieties, specifications, flexible selection, any combination. .

The precast branch cable produced by our company has original waterproofing technology, and every branch joint is passed through the immersion pressure test.

 

Product standard:

JG/T147-2002 Rated voltage 0.6/1kV Copper core plastic insulated prefabricated branch power cable "

JB/T10636-2006 Rated voltage 0.6/1 Kv (Um=1.2Kv) Copper core plastic insulated prefabricated branch power cable "

KL/JT45-2002 Technical conditions for prefabricated branch cables

Types and specifications of branch cables:

3. The type, scope and name of prefabricated branch cables.

surface 1 ordinary type

Model

Rated voltage

Nominal cross section (mm Two )

Name

FZ-VV

0.6/1KV

10-630

PVC insulated PVC sheathed prefabricated branch cable

FZ-YJV

XLPE insulated PVC sheathed prefabricated branch cable

 

surface 2 flame retardant

Model

Rated voltage (V)

Nominal cross section (mm Two )

Name

 

Yes

 

halogen

 

 

FZ -VV-ZA

FZ -VV-ZB

FZ -VV-ZC

0.6/1KV

10-630

PVC insulated PVC sheathed A Flame retardant

Prefabricated branch cable

PVC insulated PVC sheathed B Flame retardant

Prefabricated branch cable

PVC insulated PVC sheathed C Flame retardant

Prefabricated branch cable

FZ -YJV-ZA

FZ -YJV-ZB

FZ -YJV-ZC

XLPE insulated PVC sheath A Flame retardant prefabricated branch cable

XLPE insulated PVC sheath B Flame retardant prefabricated branch cable

XLPE insulated PVC sheath C Flame retardant prefabricated branch cable

nothing

 

halogen

FZ-YJY-WDZ

FZ-YJY-WDZA

FZ-YJY-WDZB

FZ-YJY-WDZC

0.6/1KV

10-630

XLPE insulated polyolefin sheathed halogen free low smoke flame retardant prefabricated branch cable

Crosslinked polyethylene insulated polyolefin sheath halogen free low smoke flame retardant A Prefabricated branch cable

XLPE polyolefin sheath non halogen low smoke flame retardant B Prefabricated branch cable

Crosslinked polyethylene insulated polyolefin sheath halogen free low smoke flame retardant C Prefabricated branch cable

 

 

surface 3 refractory type

Model

Rated voltage

Nominal cross section (mm Two )

Name

 

Yes

 

halogen

 

 

FZ -VV-NA

FZ -VV-NB

FZ -VV-NC

0.6/1KV

10-630

PVC insulated PVC sheathed A Fire resistant prefabricated branch cable

PVC insulated PVC sheathed B Fire resistant prefabricated branch cable

PVC insulated PVC sheathed C Fire resistant prefabricated branch cable

FZ -YJV-NA

FZ -YJV-NB

FZ -YJV-NC

0.6/1KV

10-630

XLPE insulated PVC sheath A Fire resistant prefabricated branch cable

XLPE insulated PVC sheath B Fire resistant prefabricated branch cable

XLPE insulated PVC sheath C Fire resistant prefabricated branch cable

nothing

 

halogen

FZ-YJY-WDZN

FZ-YJY-WDZAN

FZ-YJY-WDZBN

FZ-YJY-WDZCN

0.6/1KV

10-630

XLPE insulated polyolefin sheathed halogen free flame retardant prefabricated branch cable

Crosslinked polyethylene insulated polyolefin sheath halogen free low smoke flame retardant A Fire resistant prefabricated branch cable

Crosslinked polyethylene insulated polyolefin sheath halogen free low smoke flame retardant B Fire resistant prefabricated branch cable

Crosslinked polyethylene insulated polyolefin sheath halogen free low smoke flame retardant C Fire resistant prefabricated branch cable


4. Cable structure  

4.1 common cable structure  

 

 

       

chart 3 single core cable                chart 4 four core twisted cable (300mm) Two And below )

 

Flame retardant cable structure

   

   chart 5 single core cable                       chart 6 four core twisted cable (300mm) Two And below )

Fire resistant cable structure

     

   chart 7 single core cable diagram 8 four core twisted cable (300mm Two And below


5. Installation and installation of branch cables

Five point one Put the cable tray on the wire rack (the general cable is downstairs and pull the cable up).

Five point two The lifting rope is connected with the cable under the winding machine.

Five point three Use the winding machine to lift the cable up (also by manpower).

Five point four When lifting the cable net or hanging head to the top of the floor, hang the net or hanging head on the prepared hook.

Five point five Use special clamp to fix branch cables according to regulations.

Five point six Connect the branch head to the ammeter or distribution box.

Five point seven Connect main cable and distribution box.

Note: Laying can also be laid down from the top of the floor.

6. Guide for the use of precast branch cables  

Six point one In order to prevent cable from being damaged, collision should be avoided during transportation and laying.

Six point two Ambient temperature is lower than Zero At the temperature, the cable should be pre heated before laying.

Six point three The minimum bending radius should be no less than the actual diameter of the cable. Twenty Times;

Six point four about XLPE insulation PVC The maximum permissible continuous operation temperature of the sheath prefabricated branch cable is not more than Ninety The temperature of short circuit does not exceed Two hundred and fifty Temperature, short circuit time not exceeding 5S ;

Six point five about PVC insulation PVC The maximum permissible continuous operation temperature of the sheath prefabricated branch cable is not more than Seventy The temperature of short circuit does not exceed One hundred and sixty Temperature, short circuit time not exceeding 5S ;

Six point six All branches should be in the straight line of the line.

Six point seven The prefabricated branch cables laid on the line should be Twenty-four Fastened within hours.

Six point eight When fixing single core cable, eddy current effect should be avoided and magnetic metal clamps should not be used.

Six point nine When laying and installing, the branch line should not bear the pulling force.

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