... , output short-circuit protection, overload protection, over-temperature protection)9. With fans to controlTechnical Parameter:Technical ... inverter output)Frequency46-54Hzz (AC input is normal)50Hz±1% (AC input is abnormal)Dynamic Voltage Transients<5%Dynamic ... ProtectionDC input over-voltage, under-voltage, overload, over-temperature, short-circuit, output over-voltage, under-voltageTransmission ...