27V

27V denotes an electrical potential difference of approximately 27 volts. In technical specifications, the value is usually a nominal voltage, with actual voltage varying under load, temperature, battery state, and regulation method.

Common use and context: 27V DC provides a mid-range supply used in some industrial, automation, and portable electronics applications where 24V systems are too low and 28V nominal systems are used elsewhere. It may appear in battery packs, DC-DC converters, LED lighting drivers, and control electronics. It is not a universal standard, but it often sits alongside 24V and 28V rails, with equipment designed to tolerate small tolerances around 27V (for example, roughly 26–29V).

Safety and standards: In many jurisdictions voltages at or below 50V AC or 120V DC are considered low voltage and may be covered by SELV or PELV safety schemes. 27V DC generally presents a low shock hazard, but safe handling is still required, especially in damp or conductive environments. Standard precautions include proper insulation, enclosure, and protection against short circuits and accidental contact with exposed conductors.

Measurement and variation: A 27V supply can be produced by batteries or regulated power supplies. Tolerances depend on the design; devices specified for 27V will typically accommodate a few volts of variation and may specify acceptable ranges around the nominal value.

Overall, 27V functions as a nominal DC rail used in various equipment where a balance between higher voltage than 24V and avoiding higher, more hazardous levels is advantageous.