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STS Prepayment Metering

American National Standard for Electric Meters

Code for Electricity Metering

Categories: index, Standards

American National Standard for Electric Meters

0.1, 0.2, and 0.5 Accuracy Classes

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BS 7856

Code of practice for special design and other features of alternating current watthour meters for active energy
(MID accuracy classes A and B) for use in the UK

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COSEM
COmpanion Specification for Energy Metering
sets the rules, based on existing standards, for data exchange with energy meters
used together with DLMS

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DIN 43857-1

Watthour meters in moulded insulation case without instrument transformers, up to 60 A rated maximum current
principal dimensions for single-phase meters

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DIN 43857-2

Watthour meters in moulded insulation case without instrument transformers, up to 60 A rated maximum current;
principal dimensions for poly-phase meters

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DIN 43857-3

Watthour meters in moulded insulation case without instrument transformers, up to 60 A rated maximum current;
principal dimensions for meter terminal cover for single-phase meters

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DIN 43857-4

Watthour meters in moulded insulation case without instrument transformers, up to 60 A rated maximum current;
principal dimensions for meter terminal cover for poly-phase meters

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DIN 43859

Watthour meters for instrument-transformer connection;
main dimensions for three-phase meters

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Directive 2014/32/EU

Measuring Instrument Directive (MID)

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Device Language Message specification
a generalised concept for abstract modelling of communication entities
Official website

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EN 50470-1
Electricity metering equipment (a.c.)
– Part 1: General requirements, tests and test conditions
– Metering equipment (class indexes A, B and C)

Category: Standards

DIN EN BS 50470-3, VDE 0418-0-3
Electricity metering equipment (a.c.)
– Part 3: Particular requirements
– Static meters for active energy (class indexes A, B and C)

Categories: Glossary, index, Standards

The European Accreditation Association has per country one member. This members are allowed to approve test laboratories for e.g. calibration according to according to ISO / IEC 17025. The approved test laboratories are so-called Notified Bodies.
The members of the Association will never issue a type-test certificate by themselves, but they guarantee that the certificates issued by their notified bodies are in compliance with the relevant standards.

Example: Type Test Certificate, issued by KEMA, Netherlands
The responsible member of the European Accreditation Association is the Dutch Accreditation Council (RvA). The RvA has issued under the registration no. K006 and K009 the approval for DNV GL Netherlands B.V. to issue calibration certificates.
KEMA is operating under the umbrella of DNV GL Netherlands B.V. For recognition purpose still the old name “KEMA” is in use.
So a KEMA certificate is traceable to the European Accreditation Association.

References:
European Accreditation Association
Dutch Accreditation Council
KEMA / DNV GL

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IEC 60068-2-11

Environmental testing
Part 2-11: Tests; Test Ka
Salt mist

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IEC 60068-2-27

Environmental testing
Part 2-27: Tests; Test Ea and guidance
Shock

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IEC 60068-2-30

Environmental testing
Part 2-30: Tests; Test Db
Damp heat, cyclic (12 h + 12 h cycle)

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IEC 60068-2-6

Environmental testing
Part 2-6: Tests; Test Fc
Vibration (sinusoidal)

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IEC 60068-2-75

Environmental testing
Part 2-75: Tests; test Eh:
Hammer tests

This test is also called “spring hammer test”.

Spring Hammer Test
spring hammer test

The meter is positioned flat on solid material and the spring hammer acts on the outer surfaces of the meter cover (including windows) and on the terminal cover with a kinetic energy of 0,2 J ± 0,02 J.
The result of the test is satisfactory if the meter case and terminal cover do not sustain damage that could affect the function of the meter and if it is not possible to touch live parts. Slight damage that does not impair the protection against indirect contact or the penetration of solid objects, dust and water is acceptable.

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IEC 60529

Degrees of protection provided by enclosures
(IP Code)

IP stands for Ingress Protection

This standard describes a system for classifying the degrees of protection provided by the enclosures of electrical equipment. The Chinese standard GB 4208 is equivalent. GB 4208-2008外壳防护等级(IP代码)

The IP code consists of the marking IP plus two digits. The first digit stands for dust-protection. The second digit represents the protection against water.

Personal safety:
A protective mask must be worn when operating with open chamber door and during examination.

First digit: Solid particle protection

The first digit indicates the level of protection that the enclosure provides against access to hazardous parts (e.g., electrical conductors, moving parts) and the ingress of solid foreign object.

levelEffective againstDescription
0No protection against contact and ingress of objects
1>50 mmAny large surface of the body, such as the back of a hand, but no protection against deliberate contact with a body part
2>12.5 mmFingers or similar objects
3>2.5 mmTools, thick wires, etc.
4>1 mmMost wires, slender screws, large ants etc.
5Dust protectedIngress of dust is not entirely prevented, but it must not enter in sufficient quantity to interfere with the satisfactory operation of the equipment.
6Dust tightNo ingress of dust; complete protection against contact (dust tight). A suction must be applied. Test duration of up to 8 hours based on air flow.

Second digit: Liquid ingress protection

The second digit indicates the level of protection that the enclosure provides against harmful ingress of water.

levelEffective againstDescription
0NoneNo protection against contact and ingress of objects
1Dripping waterDripping water (vertically falling drops) shall have no harmful effect on the specimen when mounted in an upright position onto a turntable and rotated at 1 RPM. Test duration: 10 minutes, Water equivalent to 1 mm rainfall per minute
2Dripping water when tilted at 15°Vertically dripping water shall have no harmful effect when the enclosure is tilted at an angle of 15° from its normal position. A total of four positions are tested within two axes. Test duration: 2.5 minutes for every direction of tilt (10 minutes total), Water equivalent to 3 mm rainfall per minute
3Spraying water,
Any ingress of water shall be only in a quantity not impairing the operation of the meter
Water falling as a spray at any angle up to 60° from the vertical shall have no harmful effect, utilizing either:
a) an oscillating fixture
Test duration: 10 minutes, Water Volume: 0.07 l/min per hole
b) a spray nozzle with a counterbalanced shield
Test duration: 1 minute per square meter for at least 5 minutes
Water volume: 10 litres per minute, Pressure: 50–150 kPa
4Splashing water,

any ingress of water shall be only in a quantity not impairing the operation of the meter.

Water splashing against the enclosure from any direction shall have no harmful effect, utilizing either:
a) an oscillating fixture, spray ±180° from vertical, water flow 0.07 liter per minute per needle. We have usually 25 needles, so the water flow is 1.75 liter per minute. Duration 10 minutes.b) same as IPX3 spray nozzle with the shield removed
5Water jets,
Water projected by a nozzle (6.3 mm) against enclosure from any direction shall have no harmful effects.
Test duration: 1 minute per square meter for at least 3 minutes

Water volume: 12.5 litres per minute, distance 2.5 m to 3 m.
Pressure: 30 kPa at distance of 3 m

6Powerful water jets,
Water projected in powerful jets (12.5 mm nozzle) against the enclosure from any direction shall have no harmful effects.
Test duration: 1 minute per square meter for at least 3 minutes

Water volume: 100 litres per minute
Pressure: 100 kPa at distance of 3 m

Categories: index, Standards, typetest

IEC 60654-1

Industrial-process measurement and control equipment
operating conditions
part 1: climatic conditions

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IEC 60695-2-10

Fire hazard testing
Part 2-10: Glowing/hot-wire based test methods
Glow-wire apparatus and common test procedure

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IEC 60999-1

Connecting devices
Electrical copper conductors; Safety requirements for screw-type and screwless-type clamping units
Part 1: General requirements and particular requirements for clamping units for conductors 0,2 mm² up to 35 mm²

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IEC 61000-3-8

Electromagnetic compatibility (EMC) – Limits
Guide to signalling on low-voltage electrical installations
Emission levels, frequency bands and electromagnetic disturbance levels

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IEC 61000-4-2

Electromagnetic compatibility (EMC)
Part 4-2: Testing and measurement techniques
Electrostatic discharge immunity test

Chinese equivalent:
GB/T 17626.2-2006 电磁兼容 试验和测量技术 静电放电抗扰度试验

current output waveform
Current output waveform
LevelContact dischargeAir discharge
1±2 kV±2 kV
2± 4 kV±4 kV
3±6 kV±8 kV
4±8 kV±15 kV
Categories: index, Standards, typetest

IEC 61000-4-3

Electromagnetic compatibility (EMC)
Part 4-3: Testing and measurement techniques
Radiated, radio-frequency, electromagnetic field immunity test

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IEC 61000-4-30

Electromagnetic compatibility (EMC)
– Part 4-30: Testing and measurement techniques
– Power quality measurement methods
German version EN 61000-4-30
VDE 0847-4-30

Category: Standards

IEC 61000-4-4

Electromagnetic compatibility (EMC)
Part 4-4: Testing and measurement techniques
Electrical fast transient/burst immunity test

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IEC 61000-4-6

Electromagnetic compatibility (EMC)
Part 4-6: Testing and measurement techniques
Immunity to conducted disturbances, induced by radio-frequency fields

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IEC 61000-4-7

Electromagnetic compatibility (EMC)
– Part 4-7: Testing and measurement techniques
– General guide on harmonics and interharmonics measurements and instrumentation, for power supply systems and equipment connected thereto
German version EN 61000-4-7
VDE 0847-4-7

Category: Standards

IEC 62052-11

Electricity metering equipment (AC)
General requirements, tests and test conditions
Part 11: Metering equipment

Chinese equivalent:
GB/T 17215.211-2006 交流电测量设备通用要求试验和试验条件 第11部分

Tests:
short-time overcurrent, #7.2

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IEC 62053-21

Electricity metering equipment (a.c.)
Particular Requirements
Part 21: Static meters for active energy (classes 1 and 2)

Chinese equivalent:
GB/T 17215.321-2008 交流电测量设备 特殊要求第21部分:静止式有功电能表(1级和2级)

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IEC 62053-22

Electricity metering equipment
Particular Requirements
Part 22: Static meters for active energy (classes 0.1 S, 0.2 S and 0.5 S)

Chinese equivalent (class 0.1 not covered)
GB/T 17215.322-2008 交流电测量设备 特殊要求第22部分:静止式有功电能表(0.2S级和0.5S级)

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IEC 62053-23

Electricity metering equipment (a.c.)
Particular Requirements
Part 23: Static meters for reactive energy (classes 2 and 3)

Chinese equivalent:
GB/T 17215.323交流电测量设备 特殊要求 第23部分:静止式无功电能表(2级和3级)

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IEC 62055-31
EN 62055-31
VDE 0418-5-31

Electricity metering
– Payment systems
– Part 31: Particular requirements
– Static payment meters for active energy (classes 1 and 2)

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IEC 62055-41
Electricity metering
– Payment systems – Part 41:
Standard transfer specification (STS)
– Application layer protocol for one-way token carrier systems

Categories: Glossary, index, Standards, STS

IEC 62058-11

Electricity metering equipment (a.c.)
Acceptance inspection
Part 11: General acceptance inspection methods

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IEC 62058-31

Electricity metering equipment (a.c.)
Acceptance inspection
Part 31: Particular requirements for static meters for active energy (classes 0,2 S, 0,5 S, 1 and 2, and class indexes A, B and C)

IEC 62058-31:2008, modified, German version EN 62058-31

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International Vocabulary of Metrology

– Basic and General Concepts and Associated Terms (VIM)

Vocabulary, prepared by a joint working group consisting of experts appointed by BIPM, IEC, IFCC, ISO, IUPAC, IUPAP, and OIML

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International vocabulary of terms in legal metrology (VIML)

The VIML includes only the concepts used in the field of legal metrology. These concepts concern the activities of the legal metrology service, the relevant documents, as well as other problems linked with this activity. Also included in this Vocabulary are certain concepts of a general character which have been drawn from the VIM.

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The Standard Transfer Specification (STS) has become recognised as the only globally accepted open standard for prepayment systems, ensuring inter-operability between system components from different manufacturers of prepayment systems.
The application of the technology is licensed through the STS Association, thus ensuring that the appropriate encryption key management practices are applied to protect the security of the prepayment transactions of utilities operating to protect the security of the prepayment transactions of utilities operating STS systems.
It has become established as a worldwide standard for the transfer of electricity prepayment tokens since its introduction in South Africa in 1993 and subsequent publication by the International Electrotechnical Commission as the IEC62055 series of specifications.

Shenzhen CLOU is member of the STS association. See a member list here.

Categories: Glossary, index, Standards, STS