Class 105 Polyvinyl Acetal Film-Insulated Round Copper Magnet Wire has mechanical strength, and thermal stability, which is commonly used in the construction of motors, transformers, electromagnets, and other devices that rely on electromagnetism.
Polyvinyl Formal round copper wire dimensions- table 1
| Insulation materials | Polyvinyl Acetal Film |
| Thermal Class | 105 |
| Dimensions | Single 8-56 AWG, Heavy 2-50 AWG, Triple 14-30 AWG, Quad 10-36 AWG |
| Insulation thickness | Single, Heavy, Triple, Quad |
Table 2 – Properties of pvf round copper wire
| Adherence and flexibility | No cracks visible in the film coating |
| Elongation | Not less than the value 5 -36 |
| Heat shock | No cracks visible in the film coating after conditioning at 175°C |
| Springback | 14-30 AWG: not greater than the value in NEMA Standard 2-13.5 AWG: not greater than 5° |
| Dielectric breakdown | 2-9.5 AWG: not less than the value in 3400V – 3800V 10-23.5 AWG: not less than the value in 2780V -11000V 24-37 AWG: not less than the value in 1350 V-8740VTable 38-56 AWG: not less than the value in 90V – 1835V |
| Continuity | 14-24 AWG: max number of discontinuities Single Type 1: 500±5% – 750±5%Heavy Type 2: 1000±5% – 1500±5% 45-50 AWG: max number of discontinuities Single Type 1: 25±5% Heavy Type 2: 10±5% |
Table 3 – Periodic conformance tests
| Solubility | Specimens immersed in xylene shall not soften sufficiently to expose the bare conductor |
| Dielectric breakdown rated temperature | Average not less than 75% of the value required at room temperature |
| Scrape resistance | Lowest grams-to-fail load for any one of three tests, and the average of the three tests shall not be less than the values in NEMA Standard table 48 |
| Toluene / ethanol compatibility | No swelling or blistering in the film coating |
| Transformer oil resistance | 2-28 AWG: no swelling or blistering in the film coating 2-9.5 AWG: a)Four dielectric breakdown values shall average not less than the values in Table 3400V – 3800V b)At least three of the five flexibility specimens shall show no cracks visible in the film coating c)Elongation specimens shall show no swelling or blistering in the film coating 10-28 AWG: a)Ten dielectric specimens shall average not less than the values in 2780V -11000V b)At least three of the five flexibility specimens shall show no cracks visible in the film coating c)Elongation specimens shall show no swelling or blistering in the film coating |
| Thermoplastic flow | Median not less than 180°C |
Advantages:
Good insulation properties.
High thermal and chemical resistance.
Excellent electrical performance.
Application
Transformer oil resistance: it is suitable for large oil-immersed generators and transformers, where the enameled wire needs to be in contact with transformer oil for a long time.
Suitable for the production of CTC flat wire: Acetal enameled wire is also suitable for the production of CTC flat wire, which is used in large transformers to help reduce AC losses.