CLOU GLOBAL TECHNOLOGY provides energy management products and customized solutions for efficient energy usage, cost reduction, and sustainability compliance.
Here we are publishing answers to your questions related to our products and services.
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Recent Articles
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What is a Load-Switch?
A latching relay keeps its contact position indefinitely without power applied to the coil.
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Make the Most of Portable Meter Test
In order to protect the utility revenue it's essential to do regular on-site tests on meter installations.
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Johannesburg Ransomware Attack
Cyberattacks against critical infrastructure have become common…
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Security for Optical Ports on Energy Meters
Optical ports provide local access for service engineers during installation or maintenance of energy meters. Households have physical access to their energy meter and might try to get access to the meter software.
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European Accreditation
The European Accreditation Association has per country one member. This members are allowed to approve test laboratories for calibration.
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What is DLMS/COSEM ?
DLMS stands for Device Language Message Specification, a generalised concept for abstract modelling of communication entities
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Calculation methods for energy
We've got several questions related to the different recording methods for electrical energy meters. Here is the behaviour with different settings…
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General information for wiring diagrams
CLOU follows the DIN EN 81346-2 for marking and identification of components inside of automated test equipment.
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Environmental Conditions For Meter Test
Laboratory meter test equipment should operate under defined climatic conditions.
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Acceptance tests for energy meters
From time to time there are some questions regarding the acceptance inspection (FAT) for energy meters. This paper is to clarify the legal and metrological matters.
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The difference between adjustment and calibration
Calibration means the comparison of a unit under test with test equipment with higher accuracy.
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Pulse Calculation for Stationary Test Benches
All energy meters used for billing purpose have a test output for calibration. This can be flashing diode, a pulse output at the terminal or the mark of a rotating disk. This test output gives us information about the power consumption.
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Terminal wiring for electrical energy meters
In meter- or test bench descriptions you can find various expressions, all with the same meaning.
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How long does a no-load test take?
When the voltage is applied with no current flowing in the current circuit, the test output of the meter shall not produce more than one pulse.
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The different current subscripts
Together with tender documents and meter specifications you will find various subscripts related to current. Now let's look more in detail: Starting current Ist according to IECThe starting current is a fraction of the basic current or nominal current. See the multiplication factors below: IEC 62053-11 direct connected class 1: 0.004 Ibclass 2: 0.005 Ib…
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When do I need Isolation Current Transformers?
Isolation Current Transformers (ICT) are needed to test more than one direct connected energy meter on a test bench with multiple positions, assuming that the I-P links can not be opened.
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The Standard Transfer Specification STS
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.
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The four-quadrant diagram in electricity metering
The interactive diagram shows the relationship between the phase angle φ, apparent-, active- and reactive power respective energy in accordance with clauses 12 and 14 of IEC 60375.
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