Discussion about Application of SPD in TT System
Rongxing Jiang · Low Voltage Apparatus · 2008
The mutual relationship and influence of all kinds of protection in the safety protection of building electrical equipment were analyzed.The advantages and disadvantages of two modes of over voltage protection in TT system,3+1mode and 4+1mode,were analyzed.It was expounded that 3+1mode which was recommended in standard was feasible.