UL 9540:2020 free download

UL 9540:2020 free download Energy Storage Systems and Equipment
1 Scope
1.1 These requirements cover energy storage systems that are intended to receive and store energy in some form so that the energy storage system can provide electrical energy to loads or to the local/area electric power system (EPS) when needed. The types of energy storage covered under this standard include electrochemical, chemical, mechanical and thermal. The energy storage system shall be constructed either as one unitary complete piece of equipment or as matched assemblies, that when connected, form the system. This standard is a system standard, where an energy storage system consists of the an energy storage mechanism, power conversion equipment and balance of plant equipment as shown in Figure 6.1. Individual parts (e.g. power conversion system, battery system, etc.) of an energy storage system are not considered an energy storage system on their own. This standard evaluates the compatibility and safety of these various components integrated into a system.
NOTE: Energy storage systems may include equipment for charging, discharging, control, protection, power conversion, communication, controlling the system environment, air, fire detection and suppression system, fuel or other fluid movement and containment, etc.
1.2 The systems covered by this standard include those intended to be used in a standalone mode (e.g. islanded) including “self-supply” systems to provide electrical energy and those used in parallel with an electric power system or electric utility grid such as “grid-supply” systems, or applications that perform ancillary operational modes associated with power generation such as voltage support and regulation, frequency support and regulation, volt-var, capacity reserve, energy shifting or other utility grid support services.
1.3 Energy storage systems are intended for installation and use in accordance with the National Electrical Code, NFPA 70, the Canadian Electrical Code, Part I Safety Standard for Electrical Installations, CSA C22.1, the National Electrical Safety Code, IEEE C2, the International Fire Code, ICC IFC, the International Residential Code, ICC IRC, the National Fire Code of Canada, NRC NFC, the Fire Code, NFPA 1, and the Standard for the Installation of Stationary Energy Storage Systems, NFPA 855. Requirements for installation, with the exception of installation manuals and documents for installation provided with the system are outside the scope of this standard.
1.4 This standard covers energy storage systems for stationary indoor and outdoor installations. This standard also covers mobile energy storage systems as defined by this standard. The standard includes requirements for energy storage systems used in residential installations, non-residential installations and wall-mounted applications.
1.5 Systems using lead acid or Ni-cad batteries that fall within the scope of UL 1778 and only serve an uninterruptible power system (UPS) application are outside the scope of this standard.
1.6 The maximum energy capacity of individual electrochemical ESS shall not exceed the following values: