Application
HUF360 type residua l current c ircuit breaker without over current protection conforms to the standards of GB16916.1, IEC1008, BS4293 etc.It is used in the circuits of AC50~60HZ,single phase 230V(220V),three phases 400V(380V) in industrial & mining enterprises,commercial buildings and housing for protection of personal electric shock hazard and electric equipment and for unfrequent switchover of circuits under normal conditions.
Structure and operation principle
Structure
HUF360 type residual current circuit breaker co nsists of zero phase sequence current transformer, electromagnetic release,operation device,contactor system,arc- extinguishing device,insulation shell etc.
Operation principle
When the circuit works normally,residual current operated circuit breaker is in onposition.When leakage or electric shock hazard occurs in the circuit,the current transformer puts out a signal to make electromagnetic release work,and cut
off power source within 0.1 second to prevent leakage.
Normal operation condition
1. Ambient air temperature:ambient air temperature ranges from-5 ~40 ,not exceeding 35 averagely in 24 hours.
2. Location:Installation location can not exceed 2000 meters above sea level.
3. Air conditions:Relative humidity in the installation place can not exceed 50% when the air reaches the highest temperature 40 ,the average minimum tempera- ture when it is the wettest can not exceed 25 .Relative humidity does not exceed 90%.
4. Installation classification: grade ,grade .
5. Installation pollution grade: ,
6. Installation rype: din rail mounting
7. Installation conditions:magnetic field outside the installation place can not exceed 5 times of the site of magnetism in all direction.Normally speaking,RCCB should be vertically instoled. If the operation handle puts through power source upward,there should be no compact and vibration in the installation place.
8. Connection:It can be connected by screws or busbar.