1 00:00:18,765 --> 00:00:23,123 Directional overcurrent protection test in AMR relay (simple test using templates) 2 00:00:23,156 --> 00:00:28,476 AMR modular relay of Vebko company supports various protection functions. 3 00:00:28,508 --> 00:00:32,687 Explanations of the capabilities and software environment of this relay 4 00:00:32,680 --> 00:00:37,085 have already been presented in the video related to differential protection test. 5 00:00:37,117 --> 00:00:40,017 After connecting to the AMR relay at first, 6 00:00:40,185 --> 00:00:47,801 simply load the device's hardware configuration from the Device menu by selecting the Read Hardware from Relay option. 7 00:00:47,800 --> 00:00:53,820 The default password is 123456 in order to receive elements. 8 00:00:53,991 --> 00:00:58,695 At this point, a message is given to remove the signal, which if confirmed, 9 00:00:58,800 --> 00:01:02,320 if the current hardware is not the same as the relay hardware, 10 00:01:02,359 --> 00:01:08,398 the current hardware signals used in the VFC section are deleted. 11 00:01:08,423 --> 00:01:16,148 It should be noted that the settings for the conversion ratio of voltage and current transformers are determined in the related card. 12 00:01:16,200 --> 00:01:21,257 Here the ratio of current card conversion is 200A to 1A. 13 00:01:21,240 --> 00:01:24,406 As mentioned earlier in the AMR software, 14 00:01:24,531 --> 00:01:31,351 configuring some of the most widely used functions as examples are placed in the software and the user can send 15 00:01:31,359 --> 00:01:38,531 new settings to the relay by selecting each of them and applying the desired changes. 16 00:01:39,406 --> 00:01:46,126 For this purpose, a set of functions can be seen in the Relay VFC tab and in the Temp Functions section. 17 00:01:46,201 --> 00:01:52,820 It should be noted that by selecting each Temp Function, the blocks in the VFC are removed. 18 00:01:52,845 --> 00:01:58,523 Here the directional overcurrent function displayed with the name OC 67 is selected. 19 00:01:58,560 --> 00:02:05,726 In Configuring, this function uses an OC Inverse block and two OC Definite blocks that have 20 00:02:05,751 --> 00:02:09,539 different settings and the signals of a current card are assigned to their input (from a measuring point). 21 00:02:09,566 --> 00:02:17,702 Finally, output signals are assigned to Binary Outputs and relay LEDs by Output and LED blocks. 22 00:02:24,297 --> 00:02:31,085 To change the settings, simply right-click on each block to access a set of options. 23 00:02:31,421 --> 00:02:35,007 Finally, the changes are sent to the relay. 24 00:02:35,320 --> 00:02:42,390 In this video, by double-clicking on blocks that contain constant time stages for the directional overcurrent function, 25 00:02:42,400 --> 00:02:51,789 disables them and define the 1A and TMS current settings equal to 0.1 by double-clicking on the first stage, 26 00:02:51,844 --> 00:02:56,843 which is defined as reverse time. By double-clicking on the Direction block, 27 00:02:56,880 --> 00:03:03,546 the elements related to the directional function include rotation angle and ground polarization. 28 00:03:03,602 --> 00:03:10,000 After this, the changes will be sent to the relay by selecting send config and setting to relay option. 29 00:03:10,089 --> 00:03:15,414 In the next step, by running AMPro software and opening the AMT Overcurrent room, 30 00:03:15,445 --> 00:03:22,523 it is enough to go to the Object Parameters test section and create the test characteristic after entering the information. 31 00:03:22,548 --> 00:03:28,367 Keep in mind that it is also possible to test this function using the Xrio file. 32 00:03:28,695 --> 00:03:33,140 Here, the current setting value is equal to 1 amp, TMS is 0.1. 33 00:03:33,160 --> 00:03:40,328 In the overcurrent test, it is required to set two parameters maximum torque angle and sector operation. 34 00:03:40,353 --> 00:03:44,585 To do this from the Overcurrent window and the Relay Parameters tab, 35 00:03:44,610 --> 00:03:50,726 the directional option is selected and from the Element tab, the Directional section is placed on forward. 36 00:03:51,109 --> 00:04:05,531 Then enter under the Define Element Directional Behavior tab and the maximum torque angle and Sector operation parameters are equal to -45 and 172 degrees, respectively. 37 00:04:05,563 --> 00:04:09,070 In directional overcurrent relays, In order to better performance of relay, 38 00:04:09,120 --> 00:04:16,234 in orientation and reaching the MTA value ,the rotation of the reference voltage angle is used. 39 00:04:16,273 --> 00:04:25,835 The performance area or forward area in this relay is set from -131 degrees to +41 degrees. 40 00:04:25,890 --> 00:04:30,757 In order to investigate the directional overcurrent function, in addition to the time of operation and current, 41 00:04:30,781 --> 00:04:33,710 the angle of performance should also be investigated. 42 00:04:33,735 --> 00:04:39,390 For this purpose, performance time tests are performed along with amplitude and phase tests. 43 00:04:39,415 --> 00:04:45,726 In the time test, the accuracy of the performance time is investigated and in the amplitude and phase test, 44 00:04:45,720 --> 00:04:56,414 the detection and evaluation of the accuracy of the actual current and the actual angle of the performance threshold and reset threshold are considered. 45 00:04:56,438 --> 00:05:03,976 Cross Polarized method is used in AMR Vebko relay, i.e. using healthy phases to detect fault direction. 46 00:05:04,016 --> 00:05:12,976 For example, in case of faults in phase A, the relay uses VBC reference voltage and IA current to detect the fault current direction. 47 00:05:13,023 --> 00:05:22,500 The Forward or Reverse area means the part where the relay must detect the fault will be determined by the start angle and end angle. 48 00:05:22,555 --> 00:05:23,459 Time Test 49 00:05:23,484 --> 00:05:26,820 In order to test the DOC function, three states are considered. 50 00:05:26,845 --> 00:05:35,213 The first state for 500 milliseconds, normal conditions this means that it will inject a nominal voltage with zero current. 51 00:05:35,238 --> 00:05:46,726 In the second state, the fault conditions are applied and the current is selected for all phases of L1E-L2E-L3E in the range of 2 to 4 times the nominal current. 52 00:05:46,750 --> 00:05:51,289 The duration of this state should be greater than the nominal time of the relay trip. 53 00:05:51,314 --> 00:05:57,804 The third state will also be activated as post-Fault with zero voltage and current for 500 milliseconds. 54 00:05:57,840 --> 00:06:04,484 In order to see better performance of the function, from the View menu, the Detail View window opens. 55 00:06:04,523 --> 00:06:10,781 After adding double points and four times the regulatory current at the best possible angle 56 00:06:10,800 --> 00:06:18,281 in terms of performance of the function i.e. -45 degrees for the L1E-L2E-L3E falt types, 57 00:06:18,306 --> 00:06:21,328 a point in the No Trip area (here at an angle of 135 degrees) is tested. 58 00:06:21,353 --> 00:06:23,734 Due to the nature of the two-phase fault, 59 00:06:23,759 --> 00:06:36,000 the currents in this fault will have a phase difference of 180 degrees so that the 3I0 current is not created and the 67N function is not activated. 60 00:07:01,734 --> 00:07:03,334 Pickup-Drop off Test 61 00:07:03,359 --> 00:07:05,340 In order to perform the Pickup-Drop off test, 62 00:07:05,365 --> 00:07:11,662 you can also use a relay or LED contact and even a setting change to instantaneous the function. 63 00:07:11,687 --> 00:07:17,531 For this purpose, three states are needed for example in the first state, the normal network conditions, 64 00:07:17,556 --> 00:07:23,015 applied, in the second state the pickup test and in the third state the drop-off test is performed. 65 00:07:23,040 --> 00:07:29,500 In the second state, for pickup and drop-off test of angle, the current value will be twice the regulatory current. 66 00:07:29,525 --> 00:07:36,093 these states are performed in the Overcurrent room automatically by entering the settings by the user. 67 00:07:36,322 --> 00:07:44,179 The performance range of overcurrent curves in the AMR relay starts from 1.1 regulatory current in the relay. 68 00:07:44,383 --> 00:07:51,703 Therefore, first, by enabling the Active Range Limits option in the Overcurrent Protection Parameters window, 69 00:07:51,734 --> 00:07:57,523 the Imin value is set to 1.1 Iref. In the next step, 70 00:07:57,555 --> 00:08:03,452 the current adjustment value for the pickup test of the current value is placed on 1.1*1=1.1 amps. 71 00:08:03,484 --> 00:08:11,421 This test is performed at the best possible angle in terms of relay performance i.e. -45 degrees. 72 00:08:11,400 --> 00:08:16,250 After the current pick up-drop off, it is time to Pick up-drop off on the angle. 73 00:08:16,275 --> 00:08:21,140 For this purpose, as mentioned above, the current value is applied twice as much as the regulatory current, 74 00:08:21,120 --> 00:08:26,432 and once the trend is performed for the upper limit of the angle, i.e. 41 degrees, 75 00:08:26,457 --> 00:08:31,601 and once for the lower limit of the angle, i.e. -131 degrees. 76 00:08:31,600 --> 00:08:39,789 By adding the necessary tests and performing, you can finally add favorites items to the report.