ABB DPT-CB010系列双电源自动转换开关；DPT63-CB010 C16 3P
1、两者机构设计理念不同
1. The design ideas of the two institutions are different
CB级是由断路器组成，而断路器是以分断电弧为己任，要求机构快速脱扣。因而可能存在滑扣、再扣不可靠因素；而PC级机构不存在该方面问题。PC级产品的可靠性远高于CB级产品。断路器（MCCB）一般不承受短时耐受电流，触头压力较小。当供电电路发生短路时，断路器的动触头被斥开并产生限流作用，从而分断短路电流；而PC级ATSE应承受20Ie及以上过载电流，触头压力要求较大，因而ATSE触头不易被斥开，也不易被熔焊。这一特性对消防供电系统尤为重要。
The CB level is made up of circuit breakers, and the circuit breaker takes the breaking arc as its responsibility, which requires the mechanism to release quickly. Therefore, there may be some factors such as slipping and re bucking, but there is no such problem in PC level institutions. The reliability of the PC grade products is much higher than that of the CB grade products. Circuit breaker (MCCB) generally does not withstand short time withstand current, and contact pressure is small. When the power supply circuit is short circuited, the movable contact of the circuit breaker is removed and the current limiting action is produced to break the short circuit current; and the PC level ATSE should withstand the overload current of 20Ie and above, and the pressure of the contact is very demanding, so the ATSE contact is not easy to be denounced and is not easily welded. This characteristic is particularly important for the fire power supply system.
2、两路电源在转换过程中存在电源叠加问题。
2, there is power overlay problem in the transformation of two power sources.
PC级ATSE充分考虑了这一因素。PC级ATSE的电气间隙、爬电距离一般是断路器的电气间隙、爬电距离的180%、150%（标准要求）。因而PC级ATSE安全性更好。
This factor is fully taken into account by the PC level ATSE. The electrical clearance and creepage distance of PC ATSE are generally 180% and 150% of the electrical clearance and creepage distance of the circuit breaker (standard requirement). Therefore, PC level ATSE is more secure.
3、触头材料的选择角度不同。
3, the choice angle of the contact material is different.
断路器常常选择银钨、银碳化钨材料配对，这有利于分断电弧，但该类触头材料易氧化，备用触头长期暴露在外，在其表面易形成阻碍导电、难驱除的氧化物，当备用触头一但投入使用，触头温升增高易造成开关烧毁甚至爆炸；而PC级ATSE充分考虑了触头材料氧化带来的后果。
The circuit breaker is often paired with silver tungsten and silver tungsten carbide, which helps to break off the arc, but the contact material is easy to oxidize and the contact head is exposed to the outside for a long time. It is easy to form the oxide that hinders the conduction and the hard drive on its surface. When the contact head is put into use, the increase of the contact temperature is easy to cause the switch to burn and even explode; and the PC class ATSE fully considers the oxide belt of the contact material. The consequences.