CHINT NH40 series manual change over switches, including models NH40-125/4CS, NH40-162/4CS, NH40-250/4CS, NH40-400/4CS, NH40-630/4CS, NH40-1000/4CS, and NH40-1252, are designed to manually switch between power sources.  These switches, with 4 poles, provide a reliable way to transfer loads between different supplies, such as main power and a backup generator. They are used to ensure continuity of power supply in various applications. Features of CHINT NH40 Change Over Switches (Manual): Manually switch between power sources 4 poles Reliable way to transfer loads Specifications of CHINT NH40 Change Over Switches (Manual): Models: NH40-125/4CS, NH40-162/4CS, NH40-250/4CS, NH40-400/4CS, NH40-630/4CS, NH40-1000/4CS, NH40-1252 Rated Current: NH40-1000/4CS, 160A, 250A, 400A, 630A, 1000A, 1250A Poles: 4 Uses: Transfer loads between different power supplies (e.g., main and backup) Ensure continuity of power supply Benefits: Provides a reliable way to switch between power sources Ensures continuity of power supply Package includes: 1x CHINT NH40 Change Over Switches (Manual)