TS 4781

TS 4781 is a terminology standard for stabilized power supplies with d.c. output. Its subject is the naming and definition of power supplies that are fed from either an a.c. or d.c. source and deliver a stabilized direct-current output; it is concerned with common technical language rather than with product design requirements.

How stabilized d.c. power supplies are described

In general technical use, stabilized power supplies aim to reduce the effect of input variations so that the output remains as steady d.c. as practical. Their behaviour is typically discussed in terms such as input source, load response, protection, dynamic performance and environmental influence. A terminology standard like this helps engineers, writers and manufacturers use those terms consistently across specifications, manuals and test discussions.

According to the scope, the standard brings together general terms, protection terms, and terms related to physical and environmental aspects. It also covers terminology for static operation, dynamic operation, and combined operation of two or more conditions. This distinction matters because a power supply may look acceptable at nominal conditions while behaving differently under changing load, input or environmental conditions.

• D.c.-output power supplies powered from a.c. or d.c. sources
• General terminology and protection-related terms
• Physical and environmental terminology
• Terms for static, dynamic and combined operating conditions