Precautions of low voltage rail powered flatcars

transformer low-voltage side of the current is large and low voltage, should pay special attention to the terminals firm and reliable, anti-loose anti-rust, and to ensure that a large enough current contact surface. Single conductor can not cross the metal casing and other closed metal orifice that may cause eddy current.

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1. transformer low-voltage side of the current is large and low voltage, should pay special attention to the terminals firm and reliable, anti-loose anti-rust, and to ensure that a large enough current contact surface. Single conductor can not cross the metal casing and other closed metal orifice that may cause eddy current.

2.Check the insulation resistance between the transformer coil to the shell and the original pay winding before putting into operation. When less than one megohm should be dried. Insulation resistance should be measured when taking off its lap shell point and incoming and outgoing line connectors.

3. transformer inspection after installation is complete for test power, in no-load conditions to check the no-load current is not too large, no strong core vibration sound, the core, conductive parts no temperature rise phenomenon, is considered normal technical state. Usually, the step-up transformer no-load current can not exceed 20% of the rated value, step-down transformer original side of the total no-load current does not exceed 40% of the rated value, more than this value should check the voltage of each tap is properly selected, the transformer technical state is normal.

4. electric flat car must meet the technical requirements in the road rail insulation level, road rail and ground insulation resistance is not less than 0.5MQ

5. When two rails have a short circuit, the transformer will automatically trip, the short circuit items will be taken away, the transformer electric gate can be closed.

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