韓國龍聲電機株式會社(yongsung electric co;ltd)型號齊全，價格優惠：
變壓器是利用電磁感應原理制成的靜止用電器。當變壓器的原線圈接在交流電源上時，鐵心中便產生交變磁通，交變磁通用φ表示。
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led太陽能路燈，led投光燈，led吊頂燈，led日光燈都已經可以批量生產了。例如10瓦的led日光燈就可以替換40瓦的普通日光燈或者節能燈。
變壓器按用途可以分為：電力變壓器和特殊變壓器電爐變、整流變、工頻試驗變壓器、調壓器、礦用變、音頻變壓器、中頻變壓器、高頻變壓器、沖擊變壓器、儀用變壓器、電子變壓器、電抗器、互感器等。
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按鈕開關是一種結構簡單，應用十分廣泛的主令電器。在電氣自動控制電路中，用于手動發出控制信號以控制接觸器、繼電器、電磁起動器等。
固態繼電器已廣泛應用于計算機---接口設備、恒溫系統、調溫、電爐加溫控制、電機控制、數控機械等等
2三繞組變壓器：一般用于電力系統區域變電站中，連接三個電壓等級。
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