In order to serve the special requirements for electricity safety in radio and television communication industry, sbw-gd series is developed. SBW-GD samples and calculates the average trms value over all three phases, accurately detecting the effective value of various voltage waveform, guarding against electromagnetic and radio interference, and effectively filtering the grid pollution. The monolithic model with intelligent controlling functionalities is better in the following aspects: continuous operation mode (no accidental power cut-off), error log system, its voltage regulator can be remotely accessed and operated, and it has impeccable protecting functions., operating mode of the special stabilizer for radio and television communications: touch- membrane switches, parameter setting: displayed in chinese, digital parameter adjustment, display carrier: high backlit lcd display