The benefit of change-over switch is that the switch can be used for the conversion of two or more power sources.
FAQ
What's key features of Change-over Products?
Standard: IEC/EN 60669-1; Rated voltage is up to 250V; Rated currents up to 32A
What's the difference between NZK1 and NZK2?
NZK1 is three-way switch, contact 1-2 is closed when the handle is at position I, contact 1-4 is closed when the handle is at position II. NZK2 is two-way switch,Contact 1-2 is closed when the handle is at position I, and contact 1-4 is opened, contact 1-4 is closed when the handle is at position II, and contact 1-2 is opened.