JBK4 series machine tool control transformer is suitable for AC 50-60Hz, input voltage not exceeding 220V, output rated voltage not exceeding 660V circuit, as mechanical equipment of various industries, general electrical control power supply and lighting, signal lamp power supply. This series of transformers are manufactured by advanced technology. They have the characteristics of reliable operation, low energy consumption, small size, safe wiring and wide applicability. They meet the international and national standards such as VDE0550, IEC204-1, IEC439, GB5226, etc. The protection level improves IP2LX to prevent accidental contact with the circuit.