Develop guidance for protection of stationary battery systems up to the first battery disconnecting switch or device. Philosophy of battery protection as well as dc interruptions or ratings of fuses and circuit breakers are not addressed by current standards. The sub-committee will assist industry by providing guidance in these areas. New IEEE Standard - Inactive-Reserved. Guidance in the protection of stationary battery systems is provided. For the purposes of this guide, stationary battery systems include the battery and dc components to and including the first protective device downstream of the battery terminals. This guide does not set requirements; rather it presents a number of options to the dc system designer of the different types of stationary battery system protection available.