Solar Isolator Disconnect: 1500V DC, IP67, Arc-Quenching

ZHNYU ELECTRIC's solar isolator disconnects support system voltages up to 1500V DC, accommodating high-power PV modules and series strings with elevated open-circuit voltages common in large installations. This capacity ensures compatibility with utility-scale projects, reducing the number of switches required for high current paths and enabling simpler string designs. By choosing a 1500V-rated disconnect, system designers can future-proof their installations as module voltages continue rising (e.g., 700V+ panels). Our switches have been tested for 2,000 operations under 1500V and full rated current, confirming their durability. In addition, the higher voltage rating allows longer series strings, reducing wiring costs. Our products meet the latest international standards, including those from IEEE and IEC, ensuring safety and performance.

A solar isolator disconnect must safely break heavy DC currents without damaging the contacts or causing an arc flash. Traditional switches often lack the speed needed to extinguish DC arcs, leading to pitting and overheating. ZHNYU ELECTRIC has innovated a dual breaking system that accelerates arc quenching, reducing the arc time to under 5 milliseconds. This is achieved through a specially designed arc runner, deionizing plates, and a spring-loaded mechanism that provides consistent snap-action. The result is minimal contact erosion, ensuring a mechanical lifespan of up to 10,000 cycles (versus 3,000 for typical units). This technology also allows the switch to have a higher breaking capacity—up to 2,000A for short-circuit protection. For example, in a recent test, our switch successfully interrupted a fault current of 2,000A at 1500V, with no damage to the contacts or enclosure.