General description

high voltage cable brach box(outdoor ring main unit,cablejunction box), is widely used for influx and dispart branchconnecting cable under 40.5kV system from switchgear cabinetoutgoing cable with its free maintenance purpose. Its cableconnector adopt high advanced insulation material(Silicone rubberclad),without bareness electrification. Combination cable cabinetwith SF6 load break switch. with high safety andreliableprotection class Ip33, underground cable branchcabinet can service for niagara cover and heavy rain.This productis widel y used for city, industrial zone, civil zone,businesscenter, coal zone,steel factory,petroleum zone,distribution grid,especially in suitable to city power grid alteration upgrade.

The main technical parameter

Name                                                                    Data

Rated voltage,Ratedcurrent                                12KV  630A

Rated Therrmal withstandcurrent                              20KA

Rated Dynamic withstandcurrent                              50KA

Rated short-circuit Breakingcurrent                           50KA

Rated Transfercurrent                                              2000A

Impulse withstandvoltage                                         85KV

AC 50HZ 1 min withstandvoltage                              48KV

MechanismLife                                                        2000

Rated press of SF6Gas                                           0.03Mpa

Cable branch box