Table basic PDU and PDB series             

    
Model code meaning
NI:Network intelligence
SI:Surveillance intelligence
V: With anti-trip
LT:Power Indicator
SH: double-break switch
CB2P: 2P empty switch
SP: Lightning protection device
CB1P: 1P open switch
OPSH: Overload protection switch
OP:overload protection button
EMI-EMI filter