1 Scope
This part of IEC 62053
applies only to static watt-hour meters of accuracy classes 0,5 and 1 for the measurement
of DC electrical energy in DC systems, and it applies to their type tests only.
NOTE 1 For other general requirements, such as safety, dependability, etc., see the relevant
parts of IEC 62052 or IEC 62059.
This document
applies to electricity metering equipment designed to:
-
• measure and control electrical energy on electrical networks with two poles where
one of the poles is connected to earth and with voltage up to 1 500 V DC;
NOTE 2 There are DC networks with other configurations or with more than 2 poles (for example
networks with earth and both a positive and a negative pole).
-
• have all functional elements, including add-on modules, enclosed in, or forming a
single meter case with the exception of indicating displays;
-
• operate with integrated or detached indicating displays, or without an indicating
display;
-
• be installed in a specified matching socket or rack;
-
• optionally, provide additional functions other than those for measurement of electrical
energy.
The electricity metering equipment covered by this document may be used for measuring
DC electrical energy in the following, or similar, application areas:
-
• in EV (electrical vehicle) charging stations or in EV charging infrastructures, if
the measurement is placed on the DC side;
-
• in information technology (IT) server farms;
-
• in DC supply points for communication equipment;
-
• in low voltage DC networks for residential or commercial areas, if the measurement
is placed on the DC side;
-
• in solar PV (photovoltaic) systems where DC power generation is measured;
-
• in DC supply points for public transport networks (e.g. trolleybus, etc.).
Meters designed for operation with low power instrument transformers, LPITs as defined
in the IEC 61869 series, may be tested for compliance with this document only if such meters and their LPITs
are tested together and meet the requirements for directly connected meters.
NOTE 3 Modern electricity meters typically contain additional functions such as measurement
of voltage magnitude, current magnitude, power, etc.; measurement of power quality
parameters; load control functions; delivery, time, test, accounting, recording functions;
data communication interfaces and associated data security functions. The relevant
standards for these functions may apply in addition to the requirements of this document.
However, the requirements for such functions are outside the scope of this document.
This document
does not apply to:
-
• meters for which the voltage between the two poles, where one of the poles is connected
to earth, exceeds 1 500 V DC;
-
• meters to be used in networks other than with two poles in which one of the poles
is connected to earth;
-
• meters intended for connection with low power instrument transformers (LPITs as defined
in the IEC 61869 series) when tested without such transformers;
-
• metering systems comprising multiple devices physically (except LPITs) remote from
one another;
-
• portable meters;
NOTE 4 Portable meters are meters that are not permanently connected.
-
• meters used in rolling stock, vehicles, ships and airplanes;
-
• laboratory and meter test equipment;
-
• reference standard meters;
-
• data interfaces to the register of the meter;
-
• matching sockets or racks used for installation of electricity metering equipment;
-
• any additional functions provided in electrical energy meters.
This document
does not cover measures for detection and prevention of fraudulent attempts to compromise
a meter’s performance (tampering).
NOTE 5 Nevertheless, specific tampering detection and prevention requirements, and test methods,
as relevant for a particular market are subject to agreement between the manufacturer
and the purchaser.
NOTE 6 Specifying requirements and test methods for fraud detection and prevention would
be counterproductive, as such specifications would provide guidance for potential
fraudsters.
NOTE 7 There are many methods of tampering with meters reported from various markets; designing
meters to detect and prevent all kinds of tampering would lead to unjustified increase
in costs of meter design, verification and validation.
NOTE 8 Billing systems, such as, smart metering systems, are capable of detecting irregular
consumption patterns and irregular network losses which enable discovery of suspected
meter tampering.
NOTE 9
This document
does not specify emission requirements, these are specified in IEC 62052‑11:2020, 9.3.14.
NOTE 10 DC meters for rolling stock are covered by other IEC standards, e.g., from TC 9 for
railway applications: IEC 62888‑1:2018, IEC 62888‑2:2018, IEC 62888‑3:2018, IEC 62888‑4:2018, IEC 62888‑5:2018.