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Sixth, maintain good grounding: For low-voltage systems with protective zero connection, the neutral point of the low-voltage side of the transformer should be directly grounded. When the three-phase load is unbalanced, current will appear on the zero line. When this current is too large and the contact resistance is large, the grounding point will have a high temperature, igniting the surrounding combustible material.
Seventh, to prevent over temperature: transformer of waste shredder machine should monitor the temperature change. If the transformer of waste shredder machine coil is Class A insulation, its insulator is mainly paper and cotton yarn, the temperature has a great influence on insulation and service life. For every 8 °C increase in temperature, the insulation life is reduced by about 50%. . The transformer operates at normal temperature (90 °C) and has a life of about 20 years. If the temperature rises to 105 °C, the life is 7 years and the temperature rises to 120 °C. The life is only two years. Therefore, when the transformer is running, it must be kept well ventilated and cooled. If necessary, forced ventilation can be adopted to reduce the temperature rise of the transformer.
To ensure the normal operation of the transformer, the waste shredder machine can operate normally, and at the same time ensure the safety of the production, and the diligent inspection and protection can be foolproof.