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Overvoltage protection test in AMR relay (simple test using templates)

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AMR modular relay of Vebko company supports various protection functions.

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Explanations of the capabilities and software environment of this relay have already been presented in the video related to differential protection test.

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‫After connecting to the AMR relay at first,

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simply load the device's hardware configuration from the Device menu by selecting the Read Hardware from Relay option.

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The default password is 123456 in order to receive elements.

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At this point, a message is given to remove the signal, which if confirmed,

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if the current hardware is not the same as the relay hardware,

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the current hardware signals used in the VFC section are deleted.

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It should be noted that the settings for the conversion ratio of voltage and current transformers are determined in the related card.

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Here, the ratio of the current card conversion is 200A to 1A and the voltage card conversion ratio is 63,000 to 100V.

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(First, enter the VFC page):

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As mentioned earlier in the AMR software,

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configuring some of the most widely used functions as examples are placed in the software and

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the user can send new settings to the relay by selecting each of them and applying the desired changes.

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For this purpose, a set of functions can be seen in the Relay VFC tab and in the Temp Functions section.

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It should be noted that by selecting each Temp Function, the blocks in the VFC are removed.

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Here the overvoltage function displayed with the name OV 59 is selected.

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In the config of this function, first to calculate the line-by-line voltages,

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the relay voltage card signals are assigned to the Voltage Quantities block inputs and then assigned to the Overvoltage block.

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Finally, overvoltage output signals are assigned to Binary Output and relay LEDs by Output and LED blocks.

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Since the purpose is to test the overvoltage function with OR logic,

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analog signals related to the voltage sample must be applied directly to the overvoltage

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block to increase the voltage of each phase, the relay function should occur.

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By double-clicking the Overvoltage block, two stages will be defined here.

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The first stage with a 65V set and a performance time of 2 seconds and a second stage with a 70V set and a performance time of 4 seconds.

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Also, Operation Quantity is placed on Vphn/V1/V2 to include single-phase performance.

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Finally, the changes will be sent to the relay.

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In the next step, by running AMPro software and opening the AMT Under/Over Voltage Test,

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simply go to the Object Parameters test section and enter the basic information.

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Testing this function can also be performed in AMT sequencer room,

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but in order to make the states and test management more comfortable,

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this process is performed in the AMT Under/Over Voltage Test.

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Firstly, the information is entered in the General Information section.

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This information can include relay type, serial number and other information such as post name and feeder/b number.

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In the Test Setting section, the OV (59) option is selected. Here Vnom sec, 100 volts is selected.

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Also, the performance mode is located on the OR logic to increase the voltage of each phase from the specified value to provide the test.

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In order to evaluate the performance of overvoltage protection,

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two time tests (Trip time) and Voltage Performance Test (pickup/drop-off) are performed.

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Assuming two performance stages for overvoltage protection, regulatory voltage value, voltage type,

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performance time and more are entered in the Data Table section for both stages of operation.

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After this, in order to be more accurate in testing,

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continuous ramp option is selected in state setting section and C1 and C2

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contacts are considered for diagnosis of trip and pickup/drop-off, respectively.

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The status of the relay pickup can be recorded with LED in addition to contact, or even adjusting to instantaneous over-voltage protection.

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By entering the necessary settings in the Test Plan section,

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schedule the test in a way that both time test and voltage performance testing are performed.

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In fault type, by selecting L1E, L2E and L3E,

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states are created to test the function based on the voltage increase of each phase independently.

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By enabling Time Test, the state related to the performance time check is created.

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Vtest is the voltage value at which the performance of the function in each stage is guaranteed.

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By selecting yes for PU Test and DOU Test elements,

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it will be confirmed to perform pickup drop-off tests. In the PU Val.

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Assessment section, the evaluation of the pickup value of the function, in the PU Start section,

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the initial voltage of the pickup process, in the PU end section,

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the final voltage limit for the pickup test, and in the DOU End section, the final value for the drop-off test is entered.

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In the Total section, the total duration of the test is entered.

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By Clicking on the Init Test option, creating states will be done based on user-imported settings.

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These states can be seen in the Table View window.

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In this way, can perform the test to evaluate the necessary items.

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In the Measurement View section,

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Assessment ramp tab you can see the assessment of the pickup drop-off and in the Time Assessment tab,

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you can see the performance time assessments of each stage.

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Keep in mind that when the test reaches the second stage assessment section,

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a message has appeared to tell the user to disable the first stage in order to provide the conditions for non-interference.

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This can be done by removing elements related to the first stage from the blocks

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associated with pickup and trip.

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Another solution is to equalize the setting of two stages.

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For this purpose, once again refer to AMR software and set the first stage equal to the second stage settings and the settings will be sent to the relay.

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In the end, the results are added to the report by clicking on the Add to Report option.

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These results will be visible in the Report window.