... power control circuit of the filament enables longer service life of the magnetron by adjusting the power supply of ... , cooling water, magnetron, waveguide system, etc.2. General specificationsPower source: 380VAC +/-10%, 50Hz, 3 phase 4 wires 30APower consumption: ... variation of < +-1% (at 5kW output ) during power source variation of +-10%VSWR tuning range: > 20VSWR allowable: 40maxCooling water ...