Detailed description of structure of low smoke halogen free cable

Author：hlyb Add Time：2016-11-29 16:38:06

The cable insulation is usually made of halogen-free flame retardant polyolefin and silicone rubber, and the sheath is usually made of thermosetting or thermoplastic low smoke halogen-free flame retardant polyolefin material. Insulation and sheath materials for low smoke halogen free flame retardant cables
At present, hydrated metal oxides are mostly used as flame retardant fillers.

It is suitable for 600 / 1000V and below power, household appliances, all kinds of mobile electrical equipment and tools.

Detailed description of low smoke halogen free cable structure

1 General requirements for cable construction

1.1 Conductor: annealed copper wire. Unless otherwise specified in the product process, each single wire in the conductor can be tinned or tinned copper wire. Tinned copper wire shall be covered with an effective tin layer.

1.1.1 structure

The conductor structure shall comply with GB / t3956 standard.

Cross sectional area mm2	DC resistance of conductor ≤ Ω / km at 20 ℃		Cross sectional area mm2	DC resistance of conductor ≤ Ω / km at 20 ℃
Cross sectional area mm2	No tin plating	Tin plating	Cross sectional area mm2	No tin plating	Tin plating
one	nineteen point five	twenty	sixteen	one point two one	one point two four
one point five	thirteen point three	thirteen point seven	twenty-five	zero point seven eight zero	zero point seven nine five
two point five	seven point nine eight	eight point two one	thirty-five	zero point five five four	zero point five six five
four	four point nine five	five point zero nine	fifty	zero point three eight six	zero point three nine three
six	three point three zero	three point three nine	seventy	zero point two seven two	zero point two seven seven
ten	one point nine one	one point nine five

1.2 insulation

1.2.1 the insulation shall be thermoplastic halogen-free low smoke flame retardant 90 ℃ cable material.

1.2.2 the insulation shall be tightly packed on the conductor.

1.2.3 thickness

The average value of insulation thickness shall not be less than the specified value specified in this process, but the thickness at any point can be less than the specified value, as long as it is not less than 90% - 0.1 of the specified value.

1.2.4 the insulation thickness and outer diameter shall meet the requirements in the table below

Cross sectional area mm2	Nominal thickness mm	Upper limit of average outer diameter mm	Cross sectional area mm2	Nominal thickness mm	Upper limit of average outer diameter mm
one	zero point seven	two point nine	sixteen	one	eight
one point five	zero point seven	three point three	twenty-five	one point two	nine point eight
two point five	zero point eight	three point nine	thirty-five	one point two	eleven
four	zero point eight	four point four	fifty	one point four	thirteen
six	zero point eight	four point nine	seventy	one point four	fifteen
ten	one	six point eight

Detailed description of low smoke halogen free cable structure

2. The mechanical and physical properties of thermoplastic low smoke halogen-free cable material shall meet the requirements of.

Mechanical and physical properties of thermoplastic low smoke halogen free cable compound

Serial number

Test items

Company

performance requirement

test method

one

one point one

one point two

two

two point one

two point two

two point three

three

four

five

six

Mechanical properties before aging

Original value of tensile strength

----***Small median

Original value of elongation at break

----***Small median

Mechanical properties after air aging

Aging conditions - temperature

-----Processing time

Tensile strength after aging

----***Small median

----***Large rate of change

Elongation after aging

----***Small median

----***Large rate of change

Smoke density

flameless

There are some

Oxygen index

Halogen acid gas content

PH value

Conductivity

N/mm2

℃

N/mm2

Mg/g

Us/mm

≥9.0

≥150

100±2

one hundred and sixty-eight

≥9.0

±30

≥120

±30

≤250

≤100

≥30

≤5

≥4.3

≤10

GB/T2951. eleven

GB/T8323

GB/T2406

GB/T17650. one

Detailed description of low smoke halogen free cable structure

See table for electrical performance

Rated voltage U0 / u	600/1000V	450/750
Test voltage / kV	three point five	two point five
Time / min	five	five

3 packaging, transportation and storage

3.1 packaging

3.1.1 cable products shall be packaged in coils or in coils. The cable reels for reel installation shall comply with the provisions in JB / t8137. In order to prevent damage to the products during storage and transportation, appropriate protection shall be added.

3.1.2 the distance between the outer layer of the coiled cable and the connecting edge of the side plate of the cable tray shall not be less than 60mm. Both ends of the cable shall be sealed and fixed on the cable reel.

3.1.3 the looped products shall be coated with banded materials with certain strength and bound firmly.

3.2 transportation

Cable transportation shall meet the following requirements:

The cable reel shall not be placed horizontally;
Long distance rolling is not allowed;
No impact, crush and any mechanical damage;
It is not allowed to be affected by damp and exposed to the sun for a long time during long-distance transportation.

3.3 storage

Cable storage shall meet the following requirements:

Do not place the cable reel in the horizontal position;
Moistureproof and sun proof;
Prevent extrusion deformation and any mechanical damage.

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Detailed description of structure of low smoke halogen free cable