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Notizie aziendali | induttanze di modo comune | Notizie del settore | trasformatore|RJ45 connectors
1.Quando si sostituisce l'isolamento, le prestazioni dell'isolamento dovrebbero essere garantite
Testare le prestazioni dell'isolamento sostitutivo durante la lavorazione e utilizzarlo solo se soddisfa i requisiti. Particolare attenzione dovrebbe essere prestata all'isolamento dei blocchi di legno della staffa di piombo. Prima dell'installazione, il blocco di legno deve essere posizionato nella termica high frequency trasformatore,current trasformatore olio a circa 80°C per un periodo di tempo per garantire l'isolamento del blocco di legno.
2.The insulation test of high-frequency trasformatore should be carried out when the high-frequency trasformatore is sprayed with oil for 24 hours
Since some wet insulation parts will be immersed in hot oil for a long time, moisture will spread to the insulation surface, so insulation defects cannot be detected after oil injection. For example, a 110 kVA + low-voltage side of 31.5 MWa is treated with a 10kV copper rod support block. After injecting high-frequency trasformatore oil, everything is normal in the test, and the insulation resistance of the 10kV low-voltage side to the core, wire clamp and ground is reduced to about 1Ω. After inspection of the hanging hood, it was found that the insulation of the 10kV copper bar supporting wooden block was very low. Therefore, the insulation test should be carried out after 24 hours of oil injection in the high-frequency trasformatore, which is more reliable.
3.Prestare attenzione agli angoli acuti del nucleo quando si reinstalla il nucleo
When installing a yoke on the iron core, pay attention to the sharp corners of the core chip, and the insulation between the oil channels should be measured in time, especially the sharp corners of the chip at the oil passage to prevent the overlap of chips from causing the core to be grounded at multiple points. For example, when replacing a 120MVA220kV high-frequency trasformatore with a low-voltage side yoke, the insulation between the oil channels was not measured in time because the sharp corners of the chip were not paid attention to, and the insulation between the oil channels was measured to be 0 after installation. After zui, because the sharp corner of the core chip is short-circuited to the oil channel, it takes a long time to find.
4.Sostituire il materiale dell'avvolgimento con una forte resistenza al cortocircuito
1.Quando si sostituisce l'isolamento, le prestazioni dell'isolamento dovrebbero essere garantite
Testare le prestazioni dell'isolamento sostitutivo durante la lavorazione e utilizzarlo solo se soddisfa i requisiti. Particolare attenzione dovrebbe essere prestata all'isolamento dei blocchi di legno della staffa di piombo. Prima dell'installazione, il blocco di legno deve essere posizionato nella termica high frequency trasformatore,current trasformatore olio a circa 80°C per un periodo di tempo per garantire l'isolamento del blocco di legno.
2.The insulation test of high-frequency trasformatore should be carried out when the high-frequency trasformatore is sprayed with oil for 24 hours
Since some wet insulation parts will be immersed in hot oil for a long time, moisture will spread to the insulation surface, so insulation defects cannot be detected after oil injection. For example, a 110 kVA + low-voltage side of 31.5 MWa is treated with a 10kV copper rod support block. After injecting high-frequency trasformatore oil, everything is normal in the test, and the insulation resistance of the 10kV low-voltage side to the core, wire clamp and ground is reduced to about 1Ω. After inspection of the hanging hood, it was found that the insulation of the 10kV copper bar supporting wooden block was very low. Therefore, the insulation test should be carried out after 24 hours of oil injection in the high-frequency trasformatore, which is more reliable.
3.Prestare attenzione agli angoli acuti del nucleo quando si reinstalla il nucleo
When installing a yoke on the iron core, pay attention to the sharp corners of the core chip, and the insulation between the oil channels should be measured in time, especially the sharp corners of the chip at the oil passage to prevent the overlap of chips from causing the core to be grounded at multiple points. For example, when replacing a 120MVA220kV high-frequency trasformatore with a low-voltage side yoke, the insulation between the oil channels was not measured in time because the sharp corners of the chip were not paid attention to, and the insulation between the oil channels was measured to be 0 after installation. After zui, because the sharp corner of the core chip is short-circuited to the oil channel, it takes a long time to find.
4.Sostituire il materiale dell'avvolgimento con una forte resistenza al cortocircuito
