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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My meter is running too slow
The end-user had an energy meter with rotating disk (electromechanical). These meters are usually already in the field for more than 30 years.
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Energy Saving with Little Helpers?
I recently stumbled over some advertisements related to plug-in or paste devices which are claimed to reduce the electricity bill by an average of 10%.
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User Interface Unit Simulator
By now the UIU/CIU short-codes are not unified. We have collected and merged all recent requests.
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How Mean is the Value?
CLOU energy meters and test equipment is measuring the true RMS value by waveform sampling. There are other methods, but they are less accurate.
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Power Grid Stability and Renewable Energy
With increasing percentage of renewable energy on power generation we will see more disturbances in the grid.
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Waveform Sampling for Electrical Measurements
The interactive graphics below shows the impact on sampling rates on different waveforms. The error calculation is based on true-rms for a wave with 360 samples and for training purpose only.
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The Over- and Under Voltage Disconnection
The phase to neutral supply voltage is controlled by the power generation companies and utilities by using transformers with on-load tap changers. Depending on the region you can find different supply voltages.
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The Over-Current Disconnect Function
Electronic meters with build-in relays can serve for various functionalities. By IEC62052-11 Ed.2 the name for this sort of relays is Supply Control Switch (SCS).
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Who pays for the Beep?
Electronic energy meters, especially those with STS payment functions have the ability to give an alarm. Low credit is a typical example.
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Load Limiting for Energy Meters
Electronic energy meters with a load switch can be programmed for a maximum load. If a consumer exceeds the limit, he will be disconnected
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Selection of Voltage Transformers
Voltage instrument transformers (VT, sometimes also abbreviated with PT) are used on the primary side of medium- and high voltage distribution transformers.
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Selection of Current Instrument Transformers
Transformer operated energy meters need instrument transformers to reduce high voltage- and current values to lower quantities for measurement purpose.
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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
Energy meters have certain characteristics, including maximum current. It is the basis for all types of meter tests.
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The TID Clock is ticking – Historical Context Before the 2024 Rollover
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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