kyb1-60 mcb is an all new high performance current limiting device with the ability to disconnect short circuits of up to 10ka.which is the newest model in 21st century. 3kyb1-60 mcb has many nerits of high protective grade (up to ip20), high breaking capacity,good reliability of sensitive action,convenient multi-pole assorting,long using life etc.they are mainly used for overload and short circuit protection within the circuit of ac 50hz,230v in single pole,400v in double,three&four poles of lighting distribution system in industry & commerce.meanwhile,they are also used in turning on or off the electric apparatus and lighting circuit under the normal condition.