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Notícias da empresa | choques de modo comum | Notícias da indústria | transformador|RJ45 connectors
1.Ao substituir o isolamento, o desempenho do isolamento deve ser garantido
Teste o desempenho do isolamento de substituição durante o processamento e use-o apenas se atender aos requisitos. Atenção especial deve ser dada ao isolamento dos blocos de madeira do suporte de chumbo. Antes da instalação, o bloco de madeira deve ser colocado na high frequency transformador,current transformador óleo em torno de 80°C por um período de tempo para garantir o isolamento do bloco de madeira.
2.The insulation test of high-frequency transformador should be carried out when the high-frequency transformador 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 transformador 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 transformador, which is more reliable.
3.Preste atenção aos cantos afiados do núcleo ao reinstalar o núcleo
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 transformador 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.Substitua o material do enrolamento com forte resistência ao curto-circuito
1.Ao substituir o isolamento, o desempenho do isolamento deve ser garantido
Teste o desempenho do isolamento de substituição durante o processamento e use-o apenas se atender aos requisitos. Atenção especial deve ser dada ao isolamento dos blocos de madeira do suporte de chumbo. Antes da instalação, o bloco de madeira deve ser colocado na high frequency transformador,current transformador óleo em torno de 80°C por um período de tempo para garantir o isolamento do bloco de madeira.
2.The insulation test of high-frequency transformador should be carried out when the high-frequency transformador 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 transformador 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 transformador, which is more reliable.
3.Preste atenção aos cantos afiados do núcleo ao reinstalar o núcleo
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 transformador 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.Substitua o material do enrolamento com forte resistência ao curto-circuito
