1、 Purpose:
The SG series isolated step-up and down transformer is a multi-purpose AC current power supply that isolates input and output, and can perform 220V and 380V three-phase AC conversion for both input and output. Easy to use, safe and reliable. All instruments and equipment that require isolation from the power grid and AC voltage conversion can use this product.
2、 Main technical indicators
1. Maximum output capacity

2. Input voltage: three-phase 220V, 380V optional
3. Output voltage: Three phase 220V, 380V optional
4. Power frequency: 50-60Hz
5. Insulation resistance:>5M Ω
6. Insulation strength: withstand voltage test with AC 2000V 1min.
3、 Structural features
Both the primary and secondary windings are made of electromagnetic copper wire. The transformer core adopts a core type core, which is made of stacked electrical silicon steel sheets. The iron column adopts a multi-stage stepped circular cross-section, and the iron yoke adopts a rectangular cross-section. Channel steel is used as clamping pieces on both sides of the upper and lower iron yokes, and clamping screws are used to tighten the iron yoke. The upper and lower clamping pieces are tightened by lifting screws to fix the coil.
4、 Working conditions
1. The altitude high voltage shall not exceed 1000 meters. If it exceeds 1000 meters, the capacity shall be converted according to the standard of power transformers.
2. The temperature of the surrounding medium shall not exceed+40 ℃.
3. The relative humidity of the air should not exceed 85%.
4. There is no strong vibration or severely corrosive gas.
5、 Usage method
1. Before use, users must select appropriate power wires and local grid voltage and transformer nameplates based on the transformer power, and correctly connect the power wires to the input terminals.
2. Connect the output wires to the appropriate output terminals based on the user’s required voltage.
3. The load shall not exceed the data specified on the nameplate.
4. Before turning on the power switch, check that the input and output power lines are connected correctly.
5. This series uses an air switch. If there is no corresponding AC voltage output after the air switch is closed, check whether the input and output wire connections are reliable.
6、 Customized special transformer input, output voltage, and connection method are determined according to the requirements of the customer.