Here we are publishing answers on your questions related to electrical energy and metering. If you have questions, please use our contact form or write a comment below the related article.
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Recent Articles
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Cross-sections for electricity wiring
Each conductor wire has a resistance. Resistance means heat development inside the wire. Technically it’s a loss.
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Electrical Power Supply Systems
Usually the power supply systems are named with single phase, three-phase three wire or three-phase four-wire. The German VDE and the IEC60364-1 have unified the supply systems based on grounding.
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Maximum Current for Energy Meters
An energy meter has certain specifications, including maximum current. This is the base for all kind of meter type tests.
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The TID Clock is ticking
If you are using STS prepayment energy meters you might remember that updates are required for the key management centre (KMC), the security modules and the vending software.
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Markings on the Case of Energy Meters
The IEC 62052-11 Edition 2 has introduced some changes for the meter marking and documentation. Today we cover the mandatory content of the nameplate for IEC meters.
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Pairing of a User Interface Unit with a Meter
A user interface unit (UIU) is a remote access terminal for STS prepayment meters. The device is placed inside the users premisses while the energy meter is mounted outside and mostly not direct accessible.
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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.
Thank You! So much for a great blog and best of luck for the future,
I’ll be in touch.
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Kindly how can I silence my meter even after dailing 812# still it will revive on its own and starts beeping its really annoying.
The beep can only switch off temporarily for just one minute.
The beep appears because there is an alarm, either low credit, or overload, or tamper.
You can silence your meter permanently after you solve the alarm.
I have a clou meter token and am just wondering how i can silence the beeping alarm that goes off when your are low on tokens. Its kinda annoying. Ypur help will be highly appreciated.
Regards,
Steve
Steve, try code 812 on your UIU (user interface unit) and confirm by pressing the enter-button (blue or red). If it doesn’t work, please tell us the meter model type.
How can someone test reactive energy kvarh in a meter test bench?
If the energy meter has a function for measuring reactive energy, it must have a test output (a flashing diode) indicating the reactive consumption. This test output has a meter constant, indicated in e.g. pulses per kvarh. You set measurement mode in your test plan to reactive measurement and adjust the scanning heads in front of the reactive diode. All other procedure is the same like active accuracy test. The settings for reactive power is done inside the test bench and reference standard automatically.
which is the standard to be used for testing of for Reactive power in energy meter and what are the acceptable error margins?
The IEC 62053-23 is applicable for static meters for reactive energy (classes 2 and 3). The allowed errors for accuracy are given in the related tables. If you have a meter with reactive class 2, the allowed error is +/-2% for all balanced loads above 0.1 Ib and power-factor 1.
My CLOU (CL710K11) just shows zeros when I try to enquire balance or input new token, I think it is not communicating with the power source
The possible reason could be long communicate distance or the power cable quality,plsase use another socket and try again. if still doesn’t work,pls confirm whether the UIU address is right one( enter 1593570 plus the meter number to set the UIU address).
Where can I find the operational manual for clou meter, with series number CL710K11
Thank you for your message. The operation manual is for the power company or utility. End users get an introduction by the power company and a reference card with the user interface short codes. The configuration for each power company is different. If you are in doubt about a function, ask your power supplier.
My CL710K11 meter
Red light is lit next to the word “WIRING” and I noticed low power in house today. Any idea what could be the problem.
It indicates a poor communication between the user interface unit and the meter. One reason behind can be a very low supply voltage from the grid.