Composite Imide Enameled Aluminum Round Wire Manufacturers

The preferred size of the nominal diameter of the conductor diameter conductor shall comply with the R20 number system in GB/T321-2005. The actual values and their tolerances are shown in Tables 1 and 2.
When required for technical reasons, the intermediate size of the nominal diameter of the conductor selected by the user shall comply with the R40 number system in GB/T321-2005. See Appendix A for actual values and their tolerances.
The difference between the conductor diameter and the nominal diameter shall not exceed the values specified in Table 1 or Table 2.

Non-self-adhesive enameled wire size (R20)

Conductor nominal diameter / mm	Conductor tolerance / mm	Minimum film thickness / mm			Maximum outer diameter / mm
Conductor nominal diameter / mm	Conductor tolerance / mm	Level 1	Level 2	Level 3	Level 1	Level 2	Level 3
0.250	0.004	0.017	0.032	0.048	0.281	0.297	0.312
0.280	0.004	0.018	0.033	0.050	0.312	0.329	0.345
0.315	0.004	0.019	0.035	0.053	0.349	0.367	0.384
0.355	0.004	0.020	0.038	0.057	0.392	0.411	0.428
0.400	0.005	0.021	0.040	0.060	0.139	0.459	0.478
0.450	0.005	0.022	0.042	0.061	0.491	0.513	0.533
0.500	0.005	0.024	0.045	0.067	0.544	0.566	0.587
0.560	0.006	0.025	0.047	0.071	0.606	0.630	0.653
0.630	0.006	0.027	0.050	0.075	0.679	0.704	0.728
0.710	0.007	0.028	0.053	0.080	0.762	0.789	0.814
0.800	0.008	0.030	0.056	0.085	0.855	0.884	0.911
0.900	0.009	0.032	0.060	0.090	0.959	0.989	1.018
1.000	0.010	0.034	0.063	0.095	1.062	1.094	1.124
1.120	0.011	0.034	0.065	0.098	1.184	1.217	1.248
1.250	0.013	0.035	0.067	0.100	1.316	1.349	1.381
1.400	0.014	0.036	0.069	0.103	1.468	1.502	1.535
1.600	0.016	0.038	0.071	0.107	1.670	1.706	1.740
1.800	0.018	0.039	0.073	0.110	1.872	1.909	1.944
2.000	0.020	0.040	0.075	0.113	2.074	2.112	2.148
2.240	0.022	0.041	0.077	0.116	2.316	2.355	2.392
2.500	0.025	0.042	0.079	0.119	2.578	2.618	2.656
2.800	0.028	0.043	0.081	0.123	2.880	2.922	2.961
3.150	0.032	0.045	0.084	0.127	3.233	3.276	3.316
3.550	0.036	0.046	0.086	0.130	3.635	3.679	3.721
4.000	0.040	0.047	0.089	0.134	4.088	4.133	4.176
4.500	0.045	0.049	0.092	0.138	4.591	4.637	4.681
5.000	0.050	0.050	0.094	0.142	5.093	5.141	5.186
Note 1: The minimum film diameter is required to be calculated with the minimum film thickness. Note 2: For the intermediate dimension of the nominal diameter of the conductor, the minimum film thickness corresponding to the nominal diameter of the larger conductor shall be taken. Note 3: Refer to Appendix A for the intermediate dimensions of the nominal diameter of the conductors of the R40 series.

Elongation

The elongation at break and tensile strength should not be less than the values specified in Table 3.

Conductor nominal diameter / mm		Minimum elongation /%	Minimum tensile strengthN/mm²
more than the	less than or equal to	Minimum elongation /%	Minimum tensile strengthN/mm²
-	0.400	10	90
0.400	1.000	12	90
1.000	2.000	15	80
2.000	5.000	15	70

Resilience applies but does not specify requirements.
Flexibility and adhesion
Round bar winding test (conductor nominal diameter 1.600 mm and below). After the enameled wire is wound on the round bar as specified in Table 4, the paint film shall not crack.

Round bar winding

Conductor nominal diameter / mm		Round rod diameter
more than the	less than or equal to
-	1.600	3d^a
^ad The nominal diameter of the conductor of the enameled wire.

Tensile test (conductor nominal diameter 1.600mm or more) After the enameled wire is stretched by 15%, the paint film should not crack.
The paint film of the violent pull test (conductor nominal diameter 1.000 mm and below) shall not crack or lose adhesion.
Peel test (conductor nominal diameter 1.000 mm or more) is applicable but not specified.

Thermal shock

The paint film with a nominal diameter of 1.600 mm and below shall not crack. The diameter of the round bar should meet the requirements of Table 5. The minimum thermal shock temperature is given in the relevant product standard.

Conductor nominal diameter / mm		Round rod diameter
more than the	less than or equal to
-	1.600	3d^a
^ad The nominal diameter of the conductor of the enameled wire.

GB/T23312.1-2009/EC60317-0-3:2008
After the conductor has a nominal diameter of 1.600 mm and a stretch of 15%, the film shall not crack after thermal shock. The minimum thermal shock temperature is given in the relevant product standard.
Softening breakdown see the requirements of the relevant product standards.
Resistant to the requirements of the relevant product standards.
After the solvent resistance is treated with a standard solvent, the test is carried out with a pencil having a hardness of "H", and the paint layer should not be scratched.

Breakdown voltage

1. Generally, when testing at room temperature and high temperature (when required by the user), the enameled wire shall meet the requirements specified in 13.2 and 13.3, respectively. See the relevant product standards for high temperature test temperatures.
2. At least four of the five samples with a nominal diameter of 2.500 mm and below shall have no breakdown at voltages less than or equal to those specified in Table 6.

Conductor nominal diameter / mm	Minimum breakdown voltage (effective value) V
	Level 1 and Level 1B		Level 2 and Level 2B		Level 3
	Room temperature	high temperature	Room temperature	high temperature	Room temperature	high temperature
0.250	2100	1600	3900	2900	5500	4100
0.280	2200	1700	4000	3000	5800	4400
0.315	2200	1700	4100	3100	6100	4600
0.355	2300	1700	4300	3200	6400	A800
0.i00	2300	1700	4400	3300	6600	5000
0.450	2300	1700	4400	3300	6800	5100
0.500	2400	1800	4600	3500	7000	5300
0.560	2500	1900	4600	3500	7100	5300
0.630	2600	2000	4800	3600	7100	5300
0.710	2600	2000	4800	3600	7200	5400
0.800	2600	2000	4900	3700	7400	5600
0.900	2700	2000	5000	3800	7600	5700
1.000~2.500	2700	2000	5000	3800	7600	5700
Note: For the intermediate dimension of the nominal diameter of the conductor, the minimum breakdown voltage value corresponding to the nominal diameter of the larger conductor shall be taken.

At least four of the five samples with a conductor nominal diameter of 2.500 mm or more shall not break down at a voltage less than or equal to that specified in Table 7.

Breakdown voltage

Conductor nominal diameter / mm	Minimum breakdown voltage (effective value) / V
	Level 1 and Level 1B		Level 2 and Level 2B		Level 3
	Room temperature	high temperature	Room temperature	high temperature	Room temperature	high temperature
2.500以上	1300	1000	2500	1900	3800	2900

At least four of the five samples with a conductor nominal diameter of 2.500 mm or more shall not break down at a voltage less than or equal to that specified in Table 7.

Film continuity

Conductor nominal diameter / mm		Maximum number of pinholes per 30 m
more than the	less than or equal to	Level 1 and Level 1B	Level 2 and Level 2B	Level 3
-	1. 600	25	10	5

1. The temperature index test shall be carried out on the unimpregnated enameled wire specimen with a nominal diameter of 1.000 mm and a grade 2 film thickness in accordance with GB/T4074.7-2009.
2. The temperature index shall not be less than the specified value of the relevant product standard, and the failure time at the lowest test temperature shall be not less than 5000h.
3. When requested by the user, the manufacturer shall provide proof that the enameled wire meets the temperature index requirements.
4. Note: The temperature index for the extrapolated life of 20000h is only for unimpregnated enameled wire samples, not as part of the insulation system. The Celsius temperature relative to the temperature index is not the recommended enameled wire use temperature because the temperature of use is related to many factors, including the type of equipment involved.
See the requirements of the relevant product standards for refrigerant resistance.
Straight weldability is not applicable.
Thermal bonding can be found in the relevant product standards.
The dielectric loss factor can be found in the relevant product standard.
Resistance to transformer oil can be found in the relevant product standards.
See the requirements of the relevant product standards for weightlessness.
Pinhole test requirements are under consideration.
GB/T23312.1-2009/IEC60317-0-3:2008

package

The type of packaging may affect certain properties of the enameled wire, such as resilience. Therefore, the type of packaging (such as the type of delivery reel) should be determined by both the supplier and the buyer.
The enameled wire should be wound evenly and tightly on the delivery reel or placed in the container. Unless there is agreement between the supplier and the buyer, there should be no more than one line of enameled wire in the delivery reel or container. When there is more than one line segment, the length of the line segment shall be indicated on the label and/or on the package by negotiation between the supplier and the buyer.
When the enameled wire is delivered in a loop, the size and maximum quality of the loop shall be determined by negotiation between the supplier and the buyer. Any additional protection on the coil shall also be determined by negotiation between the supplier and the purchaser.
The label shall be hung on each packaging unit agreed upon by the supplier and the buyer and shall include the following:
1. Manufacturer's name and/or trademark; 2. Enamelled wire and paint film type, such as product name and/or national standard number; 3. Enameled wire net weight; 4. Enameled wire nominal diameter and paint film level; 5. Date of manufacture.