Methods for defining the dc load and for sizing a lead-acid battery to supply that load for stationary battery applications in float service are described in this recommended practice. Some factors relating to cell selection are provided for consideration. Installation, maintenance, qualification, testing procedures, and consideration of battery types other than lead-acid are beyond the scope of this recommended practice. Design of the dc system and sizing of the battery charger(s) are also beyond the scope of this recommended practice.
Vented lead-acid (VLA), valve-regulated lead-acid (VRLA), and nickel-cadmium (NiCd) stationary battery installations are discussed in this guide, written to serve as a bridge between the electrical designer and the heating, ventilation, and air-conditioning (HVAC) designer. Ventilation of stationary battery installations is critical to improving battery life while reducing the hazards associated with hydrogen production. This guide describes battery operating modes and the hazards associated with each. It provides the HVAC designer with the information to provide a cost effective ventilation solution.
Proper installation design and installation procedures are prerequisite to long and reliable service of large stationary lead storage batteries. A definite need exists within the industry for recommendations that provide a uniform method for the design of the installation and the installation procedures of all batteries to meet station requirements. However, to provide practices that can be used immediately (especially for nuclear power generating stations), this document will limit its scope to the installation design and installation procedures of large stationary lead storage batteries. Included will be the seismic considerations for new battery installations.
Large stationary lead storage batteries play an ever increasing role in substation and generating station control and power systems and in providing the back-up energy for emergencies. This Recommended Practice fulfillls the need within the industry to provide common or standard practices for the design of battery installations and the battery installation procedures. The methods described are applicable to all installations and battery sizes.
Although the storage battery is of primary importance in assuring the satisfactory operation of generating stations and substations, no single up-to-date guide exists to aid engineers in sizing the battery for a particular installation. This Recommended Practice is based on commonly accepted methods used to define the load and to ensure adequate battery capacity. The method described is applicable to all installations and battery sizes. The installations considered herein are designed for "full float" operation with a battery charger serving to maintain the battery in a charged condition as well as to supply the normal dc load.
The current issue of this Standard is a revision of the previous issue C62.1-1957 to change many of the definitions, to add a new definition titled "Virtual Duration of Wave Front" which changes the method of measuring time to crest value, to eliminate the word "type" from arrester classification designations as superfluous, to add a 10 kv distribution arrester and 90 kv intermediate and station arresters to the list of standard ratings, to change the standard ratings above 90 kv to multiples of 3, 6, and 12 kv, and to make many editorial changes for purposes of clarification or conciseness.
Recommended practices for the design of dc power systems for stationary applications are provided in this document. The components of the dc power system addressed by this document include lead-acid and nickel-cadmium storage batteries, static battery chargers, and distribution equipment. Guidance in selecting the quantity and types of equipment, the equipment ratings, interconnections, instrumentation and protection is also provided. This recommendation is applicable for power generation, substation, and telecommunication applications.
Descriptions of products, methods, and procedures relating to stationary batteries, battery electrolyte spill mechanisms, electrolyte containment and control methodologies, and firefighting considerations are provided.
Large stationary lead storage batteries play an ever increasing role in substation and generating station control systems and in providing the backup energy for emergencies. A definite need exists within the industry for an application guide and testing procedure to provide a common or standard method for selecting, applying, and installing batteries to meet station requirements. However, to provide a guide that can be used for determining the available capacity of the battery (especially for nuclear stations), this document will limit its scope to recommended practice for lead storage battery maintenance, testing. and replacement.