The ZW2-27.5(55)/T1250-2500/25-31.5 outdoor two pole vacuum circuit breaker is developed on the basis of the 3AF technology introduced from German Siemens in 1983. Its maximum rated current is 2,500A; the short-circuit breaking current reaches 31.5kA; and the mechanical life is up to 10,000 times.
This product is the first domestically produced outdoor double pole vacuum circuit breaker dedicated for electrified railways. It replaces the product imported from Japan Meidensha.
Our outdoor two pole vacuum circuit breaker was put into operation in the Houma power supply segment of Taiyuan Railway Bureau in 1993. Up to now, it has been widely used in many electrified railway projects, including Houma-Yueshan railway, Datong-Qinhuangdao railway, Lanzhou-Xinjiang railway, Qianan-Caofeidian railway, Sanxin railway, Shuohuang railway, Zhundong railway, and other coal transportation trunk lines in China.Technical Parameters
|Rated Insulation Level||Rated Lightning Impulse
|Between Open Contacts||kV||185|
|Phase to Ground||185|
|Rated Power Frequency
|Between Open Contacts||80|
|Phase to Ground||80|
|Rated Short-circuit Breaking Current||kA||25~31.5|
|Rated Short-circuit Closing Current (Peak)||kA||80|
|3s Thermal Stable Current||kA||25~31.5|
|Rated Operating Sequence||O-0.3s-CO-180s-CO|
|Rated Short-circuit Current Breaking Times||times||20|
|Rated Voltage of the Closing and Opening Coils||V||DC 220 110|
|Rated Current of the Closing and Opening Coils||A||DC 0.91 1.9|
|Power of the Energy Storage Motor||W||275|
|Voltage of the Energy Storage Motor||V||∽220 110|
|Energy Storage Time (Maximum)||s||15|
|Rated Current of the Auxiliary Switch||A||AC10 DC5|
|Rated Working Current Breaking Times||times||10000|
BBE is an experienced outdoor two pole vacuum circuit breaker manufacturer in China. In addition to railway circuit breaker, we also offer high voltage vacuum contactor, gas insulated switchgear (GIS), withdrawable switchgear, and more.