Main technique parameter:
1. Input voltage: 130~280V
2. Input frequency: 35~70Hz
3. Output voltage: 220V±0.5%
4. Output frequency: 50Hz±0.01%
5. Wave distortion: <1%
6. Isolation transformer output, safe and credible
7. Auto-protection and alarm for output overvoltage, overcurrent, overheat, short circuit.
8. Efficiency is more than 90%, adapt to large range of load, inductance, capacitance, resistance, and any mixed load.  
9. Quick dynamic feedback,  when the load changes from 0 to 100%, the steady reaction time<0.1S.
10. Regarding the input/output voltage and frequency, please explain when you purchase.
Adaptation range:
Railway, aviation, navigation system
Precision test, medical treatment electron equipment
power supply for the imported electron and electric equipment
Test for exported electron and wiring
numerical control machine tool, light industry weave, automatic product line
High performance UPS for the generator factory