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Offload test second part

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In addition to the tests that the user can perform by specifying different points on the energy meter characteristic,

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in the offload section, 5 other tests are availabe in this section as follows:

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Load Test

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Mechanism Test-

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Injection Test-

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No-Load Test-

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Creep Test-

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As mentioned in the first part, before performing any of the tests,

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we enter the information about the energy meter in the Test Object section.

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First, enter the CT and PT conversion ratio data, and then, in the Transducer Properties section,

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enter the meter constant.

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After confirming the entered information,

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select the test from the Test Mode to be performed and after adding the points, run the test.

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Load Test

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In this section, the voltage injection and current for a specific time is set to evaluate the number of pulses.

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Finally, the overall energy performance of the meter can be checked.

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 The purpose of this test is to evaluate the error rate for measuring different elements in the meter.

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To execute the test, first go to the Advanced View section, here we need to adjust the active power in the supported range of energy meter.

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Then, we add three points with 5, 10, 15 pulses to run the test, and we run the test.

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As you can see in the Test Point section, information about watt-hour,

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pulses, test duration and time and its frequency can be set.

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Mechanism Test

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In this section, the injection of rated current and rated voltage is done for a certain period of time to evaluate the amount of transmission energy.

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The purpose of this test, in addition to evaluating the error rate in the overall measurement,

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is to evaluate the error rate of the device in measuring various elements.

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Since the number of pulses is not important, points can be entered for testing based on watt-hour and time elements.

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The evaluation conditions of this test are based on the use of the Open Loop feature so that at the end of the test,

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the user can enter the measured value manually.

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Injection Test

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In this test, voltage and current are continuously injected to ensure the accuracy of the wiring as well as the initial function of the meter.

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Adjustable elements in the Test Point section for this test are: watt-hour,

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pulses, test duration and time, and frequency.

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To perform the test, add a dot and run the test.

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No-Load Test

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The focus of this test is injecting 150% of the rated voltage and zero current; to check the performance or non-performance of the meter.

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The relationship between the minimum test duration is specified as follows:

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In this test, to achieve 150% of the rated voltage, the voltage limit should be changed from the Test Object section,

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if necessary.

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Then, the test should be performed by setting the voltage to 150% of the rated voltage.

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As you can see, there is no current injection in this section.

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Creep Test

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Injecting 0.5% of the rated current with the rated voltage is performed in this section to check the performance or non-performance of the meter.

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In this section, you can also add points to perform the test based on the amount of watt-hour, pulse or duration.

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After each test, you can view the results in the Report window by selecting the Report View option.