Features:
1) BY1 series complex type (SPD)
2) This complex type includes limited SPD and switch SPD, suitable for AC
50/60Hz, 380V and below electrical system
3) Protects the electric power system from high pulse caused by thunder
or over voltage with full protection mode
4) Theory of operating: between every line wires and null lines be connected
with SPD
5) In addition, null line and earthing also connected with SPD, thus electric
power system can be protected with full mode and more safe