Applications 
It is used for supervising and controlling return circuit and protective circuit of A.C rated voltage of 450/750V or lower.

Executive standard: 
GB9330-88




Working Conditions
1、  Rated Voltage U0/U: 450/750V;
2、 Conductor temperature allowed for long-term working is 70 ℃; 
3、 Ambient temperature in installation should be no lower than 0℃，and allowed bending radius recommended are as follows: It should be no less than 6 times that of cable outer diameter for cable without armor, no less than 12 times that of cable oouter diameter for cable with armor or Cu tape shielding structure, and no less than 6 times that of cable outer diameter for soft cable with shielding structure.. 

Cable Length  
1、Generally, it should be no less than 100m, pieces of the cable no shorter than 20m are allowed for delivery, which account for no more than 10% of the total length with length error allowance no more than ±0.5%;
2、It depends on final both agreements.