1、CSP油浸式低压断路器分为有单相和三相之分，分别用于单相变压器和三相变压器，它安装于变压器的低压侧，对变压器起过载保护和短路保护作用，主要用途是保护变压器。

   There are single phase and three phase circuit breakers, used for single and three phase transformers. Circuit breaker are installed on the secondary winding of the transformer,are used for over load protection and short circuit protection. Circuit breaker are mainly used for transformer protection.

2、CSP单相和三相油浸式低压断路器的主要型号及规格 Specification and model

---------single phase circuit breaker ------------

----------- Three phase circuit breaker  ------------

型号说明：3P42TXX (3P表示两相，42表示额定电流，TXXX表示温度，如果是T120表示跳闸温度为120度,温度或设定范围为100~150度,+/-10%偏差。直流电阻值和损耗有+10%偏差。

Note:3P42TXX (“3P” means 3 poles，”42” means rated current，”TXXX” means trip temperature，for example “T120” means the trip temperature is 120degree.  Temperature can be set from 100 to 150 degree，with +/-10% tolerance. And there are +10% tolerance for resistance and losses.   

3、CSP油浸式低压断路器的主要电气性能

   Electrical specification for CSP oil type circuit breaker

4、断路器的开断能力interrupting capacity