Neutral position is functioned to cut off both power sources
In case UPS is applied, It is available to transfer to neutral position by tripping mechanism after checking circuit stability and safety instaneous transfer as follows. A ⇒ Off ⇒ B, B ⇒ Off ⇒ A and A ⇒ Off ⇒ A, B⇒ Off ⇒ B instaneous transfer can be avaiable also by operating signal.
Sufficient contact capacity against accidental current. (20 times of operating current)
On-load break and make type.
Easy busbar arrangement.
Prevent the simultaneous closing by complete mechanical and electrical tripping mechanism
Current carrying capacity of of N-phase is 100% same as other phases.
N-phase is closed earlier and opened later.