... thyristor voltage(power) regulator is used to form a complete set with the XMT-89, N-84 I1 / I2 instrument series and ... complete variety of the NZK series products that are provided with the merits of excellent performance, convenient usage, high stability and ... voltageAlternative current 220V±10% or 380V, 50±1 Hz (synchrony with the power supply)Usage environmentTemperature 0~50°c,relative humidity ...