How to cut current transformer test time in halfDecember 5, 2014 REDWIRE is news you can use from leading suppliers. Powered by FRASERS.
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Imagine a system that could simultaneously measure all taps during CT saturation, ratio and polarity, winding resistance and insulation resistance testing, and eliminate the need to test each tap sequentially and independently. Such a system would dramatically reduce testing time.
Well, there’s no need to imagine it, because that system exists today.
The new Megger MRCT is an evolution in instrument transformer testing technology. This unit will simultaneously measure voltages on all taps during CT saturation, ratio and polarity tests, as well as calculate knee points and ratios on all windings, reducing test time by up to 50 per cent.
In fact, Megger, a Markham, Ont.-based company that designs and manufactures portable electrical test equipment, says the MRCT has the shortest test duration in the industry.
Not only is it fast, but it’s accurate. With up to ±0.1 per cent ratio accuracy, the MRCT can be used to test both metering and protection class CTs.
Another bonus — it’s fully automated. The MRCT automatically performs preset test routines on all taps without changing leads and at a single push of a button. But it also allows field users to manually configure all test settings through a user-friendly touchscreen interface. The system is available with or without a built-in touchscreen controller that eliminates the need for a separate laptop or PC for automated testing.
Multiple instantaneous saturation curves and their knee points are plotted and calculated on the fly as the test is being performed. And all test results and saturation curves can be catalogued and stored within the MRCT. Test files are saved in a versatile format and can be exported into data management software.
At 35 pounds, the MRCT is the smallest and lightest secondary voltage injection unit on the market, according to Megger.
For more details on how this product can help you, contact Megger.