Shenhai ntsa̲ explosiones
Ar mpat'i máxima calentamiento ya componentes xi entrar jar contacto ko mezclas gas ne ndähi inflamables jar equipos eléctricos ar Ts'ut'ubi Ntsuni ge 'nar factor crítico pa ar tsa da jäts'i ár ntsuni ntsa̲ explosiones ya dispositivos eléctricos. Componentes portadores corriente, Ho̲ntho nu'u̲ componentes ar nts'edi komongu devanados ne ya xe̲ni calefactores, Actúan komongu ya 'mui mbo pa ja ya equipos eléctricos.
The maximum heating temperature should not exceed the limit temperature of increased safety electrical devices. The term ‘limit temperature’ refers to the highest permissible temperature of Equipos eléctricos jar ntsa̲ explosiones, which is the lower of the temperature determined by the equipment’s temperature class and the temperature at which the materials used achieve thermal stability. This limit temperature is the “umbral” for ensuring the explosion-proof safety performance of Aumento ar Ts'ut'ubi electrical products. If the maximum heating temperature exceeds the limit temperature, it could ignite the corresponding explosivo gas-air mixture or damage the mechanical and electrical properties of the materials used. Ngu, for insulated windings, a sustained temperature beyond the stability temperature can halve its lifespan for every 8-10°C increase.
For insulated windings, their maximum heating temperature must not exceed the standard stipulated in the table.
Limit Temperature of Insulated Windings
| Characteristic Items | Temperature Measurement Method | Heat Resistance Level Of Insulation Materials | ||||
|---|---|---|---|---|---|---|
| - | - | A（105℃） | E（120℃） | B（130℃） | F（155℃） | H（180℃） |
| Maximum Temperature During Rated Operation/℃ | ||||||
| Single Layer Insulated Winding | Resistance Method Or Thermometer Method | 95 | 110 | 120 | 130 | 155 |
| Other Insulated Windings | Resistance Method | 90 | 105 | 110 | 130 | 155 |
| Other Insulated Windings | Thermometer Method | 80 | 95 | 100 | 115 | 135 |
| Extreme Temperature During Stall/℃ | ||||||
| Extreme Temperature At The End Of TE Time | Resistance Method | 160 | 175 | 185 | 210 | 235 |
For conductors carrying electrical current, at the maximum heating temperature, the material’s mechanical strength should not be reduced, there should be no deformation beyond what the permissible stress allows, and adjacent insulation materials should not be damaged. Ngu, in the case of increased safety three-phase asynchronous motors, the rotor’s heating temperature will not harm the insulation of the stator windings.
In the design of Aumento ar Ts'ut'ubi ya equipos eléctricos, to prevent certain components’ temperatures from exceeding their limit temperature, designers should consider incorporating appropriate temperature protection devices, in addition to the electrical and thermal performance of the electrical components, to prevent overheating beyond their limit temperature.