In order to protect the utility’s revenue it’s essential to do regular on-site tests on meter installations. If you are suffering huge losses you should focus on transformer operated meters first.
Those meter installations can be faulty at different points: Insulation Oil Dielecric Strength Tester
![Make the most of portable meter test | Smart Energy International](http://cdn.globalso.com/hnmctech/Multi-function-Partial-Discharger-Tester-MCPD004-5.jpg)
Wrong Installation The screenshots below are taken from our wiring simulator. This simulator is part of the portable test equipment RS350.
In our example we have a three-phase four wire CT-operated meter 2500/5 A, like it’s installed in shopping malls and for small industry. We assume that the consumption is equal to the nominal load.
The wiring looks like this:
What happens when by mistake an instrument transformer for one phase is reversed?
We see that this simple mistake is causing a loss of 66%. Or in terms of money $165,600 per month. (20ct/kWh)
In Germany, utilities are inspecting CT installations every 6 months. CT/PT installations are inspected every 3 months.
The real loss reduction does mainly comes mainly from good maintenance of the transformer operated metering installations.
Read more news from Shenzhen CLOU.
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