ABB.OVR series surge protector 
 The product information published by DDB Electric Co., Ltd., intends, please call: 
 Tang: 18324299998 
 Tel :0577 -27888998 
 Fax 577 -27885998 
 QQ: 2261580 

 In an electrical circuit, when the electrical equipment failure, the current from the line to stay to the earth, and then returned to the power, this current is referred to as a ground fault current. 

 The ground fault current is very dangerous. Its degree of risk depends on the size and the surrounding environment of the fault current conditions, if the long duration of the earth fault current in the device will cause the device fires, and can even cause death. The ground fault is difficult to prevent, but the residual current operated protective devices installed in your device, then the fault current can quickly be detected and breaking. 

 The following sections Product Model 
 OVR BT2-15-1P 
 OVR BT2-40-1P 
 OVR BT2-70-1P 

 OVR BT2-15-1P + N 
 OVR BT2-40-1P + N 
 OVR BT2-70-1P + N 

 OVR BT2-15-3P + N 
 OVR BT2-40-3P + N 
 OVR BT2-70-3P + N