Voltage class is the term manufacturers and utilities use for the system voltage that a piece of equipment is meant to connect to. One voltage class can cover several nominal operating voltages. For example, a breaker in the 125 kV class may run on a nominal 115 kV system. NETA testing standards call nominal system voltages of 1000 V or less low voltage. Voltages above 1000 V and below 100,000 V are medium voltage. Customer service voltages such as 208Y/120, 240/120, 480Y/277 and 600 V all fall in the low-voltage class. Smaller residential inverters are often rated for a 600 V maximum. Utility-scale central inverters are rated for a 1500 V maximum DC input.
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related_toc1 drafted · lead Voltage levels
NETA defines low voltage as nominal system voltages of 1000 V or less and medium voltage as above 1000 V and below 100,000 V; a voltage category groups several voltage classes.
sec=h107 h=a8275f210e5asec=h600 h=220f2245214bsec=h92 h=7b9d9eadee34tbl=6 h=f4c326638895c2 drafted · lead Sunny Central UP-US
Example of 1500 V class equipment: maximum DC input voltage 1500 V.
tbl=174.r24 h=c3732eb3d053tbl=2.r4 h=0af1426c61bctbl=176.r5 h=c3732eb3d053review note: support check: partial - Max DC input 1500 V is stated for SC UP-US, but passages don't call it a 1500 V class equipment relation explicitly.
c3 drafted · lead Solectria PVI 3800-7600TL
Example of 600 V class equipment: maximum system voltage 600 V.
tbl=51.r2 h=fefbd0daf618review note: support check: partial - Max system voltage 600 V is stated for the PVI TL models, but the '600 V class' link is not stated in the passages.
related_to c7related_to c3