CLOU GLOBAL TECHNOLOGY provides energy management products and customized solutions for efficient energy usage, cost reduction, and sustainability compliance.
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Recent Articles
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Swapping Phase and Neutral
Will an electronic energy meter measure accurate when I invert phase and neutral during installation? This question came up recently.
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Ring Wave Immunity Test
The IEC 62052-11 Ed.2 comes with a lot of changes for meter type testing. Another new introduced test for electromagnetic compatibility (EMC) is the ring wave immunity test.
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The Uttar Pradesh Smart Meter Shutdown
A sudden shutdown of 150,000 smart meters happened recently in the Uttar Pradesh province, India.
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Electrostatic Discharge Test for Energy Meters
Sometimes it happens that you touch the door knob and you get an electrical shock. It's not dramatically for your body but an unpleasant feeling.
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Don't touch anything!
In your utility laboratory and for your on-site workers you take of course care for a proper training on the job and especially for personal safety.
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The Stability of IEC Standards
Meter manufacturers, utility laboratories and type testing institutes have planning security until year 2025.
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The Critical Change Value
The critical change value indicates the maximum amount of change allowed in the meter's energy registers during disturbance tests without any current flowing in the meter's current circuits.
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The Optical Test Output and Pulses
Each electronic energy meter must have at least one optical test output. Commonly its named with flashing pulse diode or similar.
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Test Bench Stability of the Output Settings
In customer requests and tenders you can still find extensive requirements for the stability of the output settings.
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Where is the Basic Current?
In the last 100 years we had a lovely Ib for direct connected meters. Now the name has changed to nominal current In.
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The Initial Start-Up for Energy Meters
Electronic energy meters are like small computers. The need some time for starting up.
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Influence of Fast Load Current Variations
The load current can vary frequently with high amplitude. The test conditions in the older versions of the IEC62052-11 have all be static…
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Repeatability Test for Energy Meters
Another new test introduced by the IEC62052-11 Edition 2 is the repeatability test.
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Influence of Self Heating
We need to figure out whether the occurring internal heat is causing a temporary error drift above the allowed limits for variation.
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No Load Test for Energy Meters 2020
With publishing of the Edition 2 of IEC62052-11 the minimum run time calculation formula has changed.
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Odd Harmonics in the Current Circuit
Two more tests for odd harmonics have been added to IEC 62052-11 edition 2.
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Which Meter Constant should a Meter have?
Higher constant means faster testing. The most time-savings are coming from the no-load test and the starting test.
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The Energy Meter Register Resolution
The main purpose of an electronic energy meter is the accurate metering of the customer consumption. The meter has registers for storing the various consumption values
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