BY4 type SPD is series surge protective device (protector in short) is applied in A.C 50/60 Hz , ≤380V electric power system such as TT,IT ,TN-S,TN-C and TN-C-S, and used at the equipotential connection of LPZ0A and LPZ31 zone or LPZ0B and LPZ1 zone, which protects the electric network shocked by the thunder or surge over voltage.
The protector can be made connecting with remote signaling contact, which is a normal open contact. If one or more of modular of the protector is in malfuction, the contact will be closed, and sending the malfunction signal. The rated value of remote signaling contact is AC36V,1A.
Maximum continuous operating voltage:                              Uc 320, 385VAC
test classification:                                                                II grade
voltage protection level:                                                       uP< 2.0 2.5 3.0 kV
max. discharging current (8/20µs):                                     Imax 60 80 100kA
Nominal discharge current (8/20µs):                                   In 30 40 60kA