ABSTRACT
Stationary lead-acid accumulator batteries (ABs) are the most important component of auxiliary DC power supply systems at substations and power plants. In Russia, the availability of ABs at substations is compulsory for voltage rates of 110 kV and higher, whereas in many Western countries an AB is the most important part of substations of all classes. Unfortunately, multiple regulatory documents-operational manuals and standards-cannot answer a number of questions that arise when working with ABs. This chapter is not meant to be a substitute for actual manuals and standards, but rather to supplement them with data necessary for understanding the arrangement of ABs and processes that take place inside them. This knowledge is compulsory for the correct selection of an AB type and its proper implementation.
