DIN EN 50470-4:2024-08

This document applies only to static watt-hour meters of accuracy classes A, B and C for the measurement of direct current electrical active energy in DC systems and it applies to their type tests. This document applies to electricity metering equipment designed to: - measure and control electrical energy on DC electrical networks with voltages up to 1 500 V; - form a complete meter including the legally relevant display of measured values; - operate with integrated or detached legally relevant displays; - optionally, provide additional functions other than those for measurement of electrical energy. Meters designed for operation with external DC instrument transformers, transducers or shunts can be tested for compliance with this document only if such meters and their transformers, transducers or shunts are tested together and meet the requirements for directly connected meters. Requirements in this document and in EN IEC 62052-11:2021/A11:2022 applying to meters designed for operation with DC LPITs also apply to meters designed for operation with external instrument transformers, transducers or shunts. This document does not apply to: - portable meters; - meters used in rail vehicles (railway applications), ships, and aircraft; - laboratory and meter testing equipment; - standard meters; - data interfaces to the meter's counting device; - suitable holders or frames used for installing electricity meters; - all other functions of electricity meters. Measures for detecting and preventing fraudulent attempts to influence the performance of meters (tampering) are not covered by this document. They can be used for measuring DC electrical energy, amongst others, in the following application areas: - in EV (electrical vehicle) charging stations or in EV charging infrastructure (also called EVSE, electric vehicle supply equipment), if energy is measured on the DC side; - in solar PV (photovoltaic) systems where DC power generation is measured; - in low voltage DC networks for residential or commercial areas, if energy is measured on the DC side, including similar applications like information technology (IT) server farms or DC supply points for communication equipment; - in DC supply points for public transport networks (for example, for trolleybuses); - in mobile applications on vehicles for e-road (electric road) systems.