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There are corresponding technical requirements for different types of transformers, which can be expressed by corresponding technical parameters. For example, the main technical parameters of power transformer include: rated power, rated voltage and voltage ratio, rated frequency, working temperature grade, temperature rise, voltage regulation rate, insulation performance and moisture-proof performance.
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Classification by cooling mode: dry type (self cooling) transformer, oil immersed (self cooling) transformer and fluoride (evaporative cooling) transformer. Classified by moisture-proof mode: open transformer, potted transformer and sealed transformer. Classification by iron core or coil structure: core transformer (insert iron core, C-type iron core and ferrite iron core), shell transformer (insert iron core, C-type iron core and ferrite iron core), ring transformer and metal foil transformer.
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Transformer is a device that transforms AC voltage, current and impedance. When AC current is connected in the primary coil, AC magnetic flux will be generated in the iron core (or magnetic core), causing voltage (or current) to be induced in the secondary coil. The transformer is composed of iron core (or magnetic core) and coil. The transformer is composed of iron core (or magnetic core) and coil.
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The first is the neutral point grounding mode. The 10kv high voltage system for EAF belongs to the neutral point ungrounded system, while the neutral point of the low-voltage 380V / 220V power supply system must be directly grounded; The second is the power supply mode. The 10kv High-voltage power supply system adopts three-phase three wire system, and the low-voltage 380V / 220V power supply system adopts three-phase four wire system;
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The composition of the high-voltage DC power supply system is the same as that of the traditional − 48 V DC power supply system, except that the output voltage level of the rectifier is higher than − 48 v. The system consists of mains power input, high-frequency switching rectifier, distribution panel and battery pack. HVDC power supply system can replace the current AC UPS power supply system to supply power to the data server.
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