| No. Standard
item Technical parameter Standard
number Category |
Fiberglass covered round
wire |
Double-fiberglass covered
flat wire |
Fiberglass covered enameled
flat wire |
Fiberglass covered film-coiling
flat wire |
Testing method |
| GB7676.2-87
GB7672.3-87 |
GB7672.4-87
|
GB7672.5-87
|
GB7672.6-87
|
| 1 |
Insulation thicknessmm
Round wire（D-d)
Flat wire（A-a) |
Nominal diametermm
0.30≤d≤3.00
3.00＜d≤34.00
4.00＜d≤5.00 |
Insulation thickness
Thin Thick
0.12 0.25
0.20 0.30
0.25 0.35 |
Extension rate
%
-20 |
Nominal diametermm
0.53≤d≤0.75
0.80≤d≤1.00
1.06≤d≤1.50
1.60≤d≤2.50
|
Deviation
%
-20 |
Insulation thicknessMM
0.2
0.3
0.4
0.5 |
Deviation
%
-20 |
Insulation thicknessMM
0.3
0.4
0.5 |
Deviation
%
-20 |
Insulation thicknessMM
0.4
0.5
0.6 |
Deviation
%
-15 |
7672.1-87GB7672.1-87 |
| 2 |
Extension rate |
Round copper wire size
Nominal diametermm
0.30≤d≤4.00
0.40＜d≤1.50
1.50＜d≤5.00 |
Extension
rate%
20
25
30 |
Round aluminum wire
Nominal diametermm
0.30≤d≤1.00
1.00≤d≤5.00
|
|
Nominal diametermm
a≤0.25
a＞2.50 |
Extension
rate%
aluminum
17
17 |
|
GB/T4074.3-99 |
| 3 |
Coiling and bending |
标称直径mm
d≤4.00
0.40＜d≤0.60
0.60＜d≤0.80
0.80＜d≤1.00
1.00＜d≤1.50
1.50＜d≤2.00
2.00＜d≤3.0
3.0＜d≤4.0
4.0＜d≤5.0 |
Nominal
diametermm
2
3
4
5
8
10
15
20
25 |
No coiling requirement
This table is suitable for sample
coiling of penetration voltage
0.53＜d≤0.60
0.60＜d≤0.80
0.80＜d≤1.00
1.00＜d≤1.50
1.50＜d≤2.00
2.00＜d≤2.50 |
|
Nominal diametermm
200≤b≤8.00
8.00＜b≤16.00
0.80＜b≤5.60 |
Round bar diametermm
10b
15b
10a |
|
GB/T4074.3-99
GB/T4074.3-99 |
| 4 |
Adhesion |
Nominal diametermm
d≤2.50
d≥2.50 |
Extension rate%
Aluminum
10
10 |
stretch 15% |
|
Conductor
aluminum |
Nominal diametermm
Overall size |
stretch%
10 |
Conductor |
stretch%
10 |
GB/T4074.3-99 |
| 5 |
Penetration voltage |
Nominal diametermm
|
Insulation thicknessmm
0.12
0.25
0.20
0.30
0.25
0.35 |
Penetration voltageV
250
450
350
500
450
550 |
Insulation thickness
Thin
Thick |
Penetration voltageV
800
1000 |
Insulation thicknessmm
0.2
0.3
0.4
0.5 |
Penetration voltageV
300
400
500
350 |
Insulation thicknessmm
0.3
0.4
0.5 |
Penetration voltageV
SBQB
1200
1400
SBEQB
1600
1800
2000 |
Insulation thicknessmm
0.4
0.5
0.6 |
Penetration voltageV
2500
4500
5500 |
GB/t4074.5-99 |
| 6 |
DC resistance |
It should be in accordance
with technical requirements for DC
resistance value R20 per unit length
when the round aluminum conductor
is at 20. |
R20=
P20/Smin
Above Smin means the minimum section
area of conductor, which is calculated
by minimum size of a/b and maximum
size of r
Smin=amin×bmin-0.8584r2max
For aluminum conductor：P20=1/35.7Ωmm2/m
|
GB/Y4074.5-99 |
