1 00:00:26,981 --> 00:00:27,043 I 2 00:00:27,044 --> 00:00:27,106 In 3 00:00:27,107 --> 00:00:27,170 Int 4 00:00:27,171 --> 00:00:27,233 Intr 5 00:00:27,234 --> 00:00:27,296 Intro 6 00:00:27,297 --> 00:00:27,359 Introd 7 00:00:27,360 --> 00:00:27,422 Introdu 8 00:00:27,423 --> 00:00:27,485 Introduc 9 00:00:27,486 --> 00:00:27,548 Introduci 10 00:00:27,549 --> 00:00:27,611 Introducin 11 00:00:27,612 --> 00:00:27,674 Introducing 12 00:00:27,675 --> 00:00:27,737 Introducing 13 00:00:27,738 --> 00:00:27,801 Introducing “ 14 00:00:27,802 --> 00:00:27,864 Introducing “A 15 00:00:27,865 --> 00:00:27,927 Introducing “AM 16 00:00:27,928 --> 00:00:27,990 Introducing “AMT 17 00:00:27,991 --> 00:00:28,053 Introducing “AMT 18 00:00:28,054 --> 00:00:28,116 Introducing “AMT D 19 00:00:28,117 --> 00:00:28,179 Introducing “AMT Di 20 00:00:28,180 --> 00:00:28,242 Introducing “AMT Dif 21 00:00:28,243 --> 00:00:28,305 Introducing “AMT Diff 22 00:00:28,306 --> 00:00:28,368 Introducing “AMT Diff. 23 00:00:28,369 --> 00:00:28,432 Introducing “AMT Diff. 24 00:00:28,433 --> 00:00:28,495 Introducing “AMT Diff. H 25 00:00:28,496 --> 00:00:28,558 Introducing “AMT Diff. Ha 26 00:00:28,559 --> 00:00:28,621 Introducing “AMT Diff. Har 27 00:00:28,622 --> 00:00:28,684 Introducing “AMT Diff. Harm 28 00:00:28,685 --> 00:00:28,747 Introducing “AMT Diff. Harmo 29 00:00:28,748 --> 00:00:28,810 Introducing “AMT Diff. Harmon 30 00:00:28,811 --> 00:00:28,873 Introducing “AMT Diff. Harmoni 31 00:00:28,874 --> 00:00:28,936 Introducing “AMT Diff. Harmonic 32 00:00:28,937 --> 00:00:29,000 Introducing “AMT Diff. Harmonics 33 00:00:29,001 --> 00:00:29,063 Introducing “AMT Diff. Harmonics” 34 00:00:29,064 --> 00:00:29,126 Introducing “AMT Diff. Harmonics” 35 00:00:29,127 --> 00:00:29,189 Introducing “AMT Diff. Harmonics” r 36 00:00:29,190 --> 00:00:29,252 Introducing “AMT Diff. Harmonics” ro 37 00:00:29,253 --> 00:00:29,315 Introducing “AMT Diff. Harmonics” roo 38 00:00:29,316 --> 00:00:29,378 Introducing “AMT Diff. Harmonics” room 39 00:00:29,379 --> 00:00:29,441 Introducing “AMT Diff. Harmonics” room: 40 00:00:29,442 --> 00:00:29,942 Introducing “AMT Diff. Harmonics” room: 41 00:00:29,967 --> 00:00:36,014 “Differential Harmonic” test or “Inrush Blocking” test is performed in “AMT Diff. Harmonics” room. 42 00:00:36,039 --> 00:00:39,724 This room opens by clicking on “AMT Diff Harmonics” option. 43 00:00:39,749 --> 00:00:46,121 At the moment of initiation, power transformers draw a great deal of inrush current named “Inrush”. 44 00:00:46,146 --> 00:00:55,516 If the transformer is not completely “Demagnetized”, and has some residue, it makes it to draw a great deal of inrush current which can damage the transformer. 45 00:00:55,541 --> 00:01:04,645 One of the ways for detecting this inrush current at the moment of transformer initiation is to compare the secondary harmonic current with the main harmonic. 46 00:01:04,677 --> 00:01:11,066 “AMT Diff Harmonics” room consists of two main windows of “Test View” and “Harmonic Restraint View”. 47 00:01:11,141 --> 00:01:20,568 “Shot”, “Check” and “Search” tests are performed in “Test View” window and in “Harmonic Restraint View” the harmonic differential characteristic curve is displayed. 48 00:01:20,593 --> 00:01:25,693 This diagram is based on a percentage of the harmonic current of the “n”th level and “Idiff”. 49 00:01:25,717 --> 00:01:32,598 Note that in this window it is possible to manage the settings up to 20th harmonic and inject it into the relay. 50 00:01:32,622 --> 00:01:40,993 In this room, three current outputs of the device are used to perform the injection into the relay because the transformer turns via, three phases. 51 00:01:41,018 --> 00:01:41,076 R 52 00:01:41,077 --> 00:01:41,135 Re 53 00:01:41,136 --> 00:01:41,195 Rel 54 00:01:41,196 --> 00:01:41,254 Rela 55 00:01:41,255 --> 00:01:41,313 Relay 56 00:01:41,314 --> 00:01:41,372 Relay 57 00:01:41,373 --> 00:01:41,432 Relay s 58 00:01:41,433 --> 00:01:41,491 Relay se 59 00:01:41,492 --> 00:01:41,550 Relay set 60 00:01:41,551 --> 00:01:41,609 Relay sett 61 00:01:41,610 --> 00:01:41,669 Relay setti 62 00:01:41,670 --> 00:01:41,728 Relay settin 63 00:01:41,729 --> 00:01:41,787 Relay setting 64 00:01:41,788 --> 00:01:41,846 Relay settings 65 00:01:41,847 --> 00:01:41,906 Relay settings 66 00:01:41,907 --> 00:01:41,965 Relay settings i 67 00:01:41,966 --> 00:01:42,024 Relay settings in 68 00:01:42,025 --> 00:01:42,083 Relay settings in 69 00:01:42,084 --> 00:01:42,143 Relay settings in “ 70 00:01:42,144 --> 00:01:42,202 Relay settings in “A 71 00:01:42,203 --> 00:01:42,261 Relay settings in “AM 72 00:01:42,262 --> 00:01:42,320 Relay settings in “AMT 73 00:01:42,321 --> 00:01:42,380 Relay settings in “AMT 74 00:01:42,381 --> 00:01:42,439 Relay settings in “AMT D 75 00:01:42,440 --> 00:01:42,498 Relay settings in “AMT Di 76 00:01:42,499 --> 00:01:42,557 Relay settings in “AMT Dif 77 00:01:42,558 --> 00:01:42,617 Relay settings in “AMT Diff 78 00:01:42,618 --> 00:01:42,676 Relay settings in “AMT Diff. 79 00:01:42,677 --> 00:01:42,735 Relay settings in “AMT Diff. 80 00:01:42,736 --> 00:01:42,794 Relay settings in “AMT Diff. H 81 00:01:42,795 --> 00:01:42,854 Relay settings in “AMT Diff. Ha 82 00:01:42,855 --> 00:01:42,913 Relay settings in “AMT Diff. Har 83 00:01:42,914 --> 00:01:42,972 Relay settings in “AMT Diff. Harm 84 00:01:42,973 --> 00:01:43,031 Relay settings in “AMT Diff. Harmo 85 00:01:43,032 --> 00:01:43,091 Relay settings in “AMT Diff. Harmon 86 00:01:43,092 --> 00:01:43,150 Relay settings in “AMT Diff. Harmoni 87 00:01:43,151 --> 00:01:43,209 Relay settings in “AMT Diff. Harmonic 88 00:01:43,210 --> 00:01:43,268 Relay settings in “AMT Diff. Harmonics 89 00:01:43,269 --> 00:01:43,328 Relay settings in “AMT Diff. Harmonics” 90 00:01:43,329 --> 00:01:43,387 Relay settings in “AMT Diff. Harmonics” 91 00:01:43,388 --> 00:01:43,446 Relay settings in “AMT Diff. Harmonics” r 92 00:01:43,447 --> 00:01:43,505 Relay settings in “AMT Diff. Harmonics” ro 93 00:01:43,506 --> 00:01:43,565 Relay settings in “AMT Diff. Harmonics” roo 94 00:01:43,566 --> 00:01:43,624 Relay settings in “AMT Diff. Harmonics” room 95 00:01:43,625 --> 00:01:43,683 Relay settings in “AMT Diff. Harmonics” room: 96 00:01:43,684 --> 00:01:44,084 Relay settings in “AMT Diff. Harmonics” room: 97 00:01:44,109 --> 00:01:49,988 As mentioned before, before testing the relay, its information must be entered in “Test Object” window. 98 00:01:50,012 --> 00:01:59,640 In “Device” block, information such as nominal characteristics of the relay, serial number, location of the relay and “CT” and “PT” characteristics of the relay are entered. 99 00:01:59,665 --> 00:02:02,993 This section has been thoroughly explained in previous videos. 100 00:02:03,018 --> 00:02:09,927 But the main block of this room is “Differential” by double-clicking on which “Differential Protection Parameters” window opens. 101 00:02:09,951 --> 00:02:13,136 This window consists of four tabs of “Protected Object”, 102 00:02:13,160 --> 00:02:14,417 “Protection Device”, 103 00:02:14,441 --> 00:02:19,248 “Characteristic Definition” and “Harmonic” where the differential relay settings is entered. 104 00:02:19,272 --> 00:02:19,316 “ 105 00:02:19,317 --> 00:02:19,362 “P 106 00:02:19,363 --> 00:02:19,407 “Pr 107 00:02:19,408 --> 00:02:19,452 “Pro 108 00:02:19,453 --> 00:02:19,498 “Prot 109 00:02:19,499 --> 00:02:19,543 “Prote 110 00:02:19,544 --> 00:02:19,588 “Protec 111 00:02:19,589 --> 00:02:19,634 “Protect 112 00:02:19,635 --> 00:02:19,679 “Protecte 113 00:02:19,680 --> 00:02:19,724 “Protected 114 00:02:19,725 --> 00:02:19,770 “Protected 115 00:02:19,771 --> 00:02:19,815 “Protected O 116 00:02:19,816 --> 00:02:19,861 “Protected Ob 117 00:02:19,862 --> 00:02:19,906 “Protected Obj 118 00:02:19,907 --> 00:02:19,951 “Protected Obje 119 00:02:19,952 --> 00:02:19,997 “Protected Objec 120 00:02:19,998 --> 00:02:20,042 “Protected Object 121 00:02:20,043 --> 00:02:20,087 “Protected Object” 122 00:02:20,088 --> 00:02:20,133 “Protected Object” 123 00:02:20,134 --> 00:02:20,178 “Protected Object” t 124 00:02:20,179 --> 00:02:20,223 “Protected Object” ta 125 00:02:20,224 --> 00:02:20,269 “Protected Object” tab 126 00:02:20,270 --> 00:02:20,314 “Protected Object” tab: 127 00:02:20,315 --> 00:02:20,615 “Protected Object” tab: 128 00:02:20,639 --> 00:02:26,367 In this tab the information of the transformer on which the “Inrush Blocking” protection is done is entered. 129 00:02:26,392 --> 00:02:30,585 Frist, from “Protected Object” section, the “Transformer” option is selected. 130 00:02:30,609 --> 00:02:42,322 Other information of this tab such as the number of coils of the transformer, nominal voltage, nominal power, vector group characteristics and “CTs” characteristic should be entered at the two sides of the relay. 131 00:02:42,347 --> 00:02:48,788 This information is the same as that of the “AMT Differential” room and has been explained in previous videos. 132 00:02:48,812 --> 00:02:48,848 “ 133 00:02:48,849 --> 00:02:48,885 “P 134 00:02:48,886 --> 00:02:48,923 “Pr 135 00:02:48,924 --> 00:02:48,960 “Pro 136 00:02:48,961 --> 00:02:48,997 “Prot 137 00:02:48,998 --> 00:02:49,034 “Prote 138 00:02:49,035 --> 00:02:49,071 “Protec 139 00:02:49,072 --> 00:02:49,108 “Protect 140 00:02:49,109 --> 00:02:49,146 “Protecti 141 00:02:49,147 --> 00:02:49,183 “Protectio 142 00:02:49,184 --> 00:02:49,220 “Protection 143 00:02:49,221 --> 00:02:49,257 “Protection 144 00:02:49,258 --> 00:02:49,294 “Protection D 145 00:02:49,295 --> 00:02:49,331 “Protection De 146 00:02:49,332 --> 00:02:49,369 “Protection Dev 147 00:02:49,370 --> 00:02:49,406 “Protection Devi 148 00:02:49,407 --> 00:02:49,443 “Protection Devic 149 00:02:49,444 --> 00:02:49,480 “Protection Device 150 00:02:49,481 --> 00:02:49,517 “Protection Device” 151 00:02:49,518 --> 00:02:49,554 “Protection Device” 152 00:02:49,555 --> 00:02:49,592 “Protection Device” t 153 00:02:49,593 --> 00:02:49,629 “Protection Device” ta 154 00:02:49,630 --> 00:02:49,666 “Protection Device” tab 155 00:02:49,667 --> 00:02:49,703 “Protection Device” tab: 156 00:02:49,704 --> 00:02:50,004 “Protection Device” tab: 157 00:02:50,028 --> 00:02:57,113 After entering the transformer information, the information and differential relay characteristics are entered in “Protection Device” tab. 158 00:02:57,137 --> 00:03:05,939 This information includes determining the calculation formula of “I bias” or “I Restraint” current by the relay, determining the reference winding 159 00:03:05,963 --> 00:03:14,651 specifying the maximum fault injection time and delay time after the “Trip”, entering the minimum and maximum differential current in the relay characteristic curve, 160 00:03:14,675 --> 00:03:26,430 entering the nominal relay operation time and specifying the current and time tolerances of the relay which are the same as “AMT Differential” room and have been thoroughly explained in previous videos. 161 00:03:26,455 --> 00:03:26,507 “ 162 00:03:26,508 --> 00:03:26,560 “C 163 00:03:26,561 --> 00:03:26,613 “Ch 164 00:03:26,614 --> 00:03:26,666 “Cha 165 00:03:26,667 --> 00:03:26,719 “Char 166 00:03:26,720 --> 00:03:26,772 “Chara 167 00:03:26,773 --> 00:03:26,825 “Charac 168 00:03:26,826 --> 00:03:26,878 “Charact 169 00:03:26,879 --> 00:03:26,930 “Characte 170 00:03:26,931 --> 00:03:26,983 “Character 171 00:03:26,984 --> 00:03:27,036 “Characteri 172 00:03:27,037 --> 00:03:27,089 “Characteris 173 00:03:27,090 --> 00:03:27,142 “Characterist 174 00:03:27,143 --> 00:03:27,195 “Characteristi 175 00:03:27,196 --> 00:03:27,248 “Characteristic 176 00:03:27,249 --> 00:03:27,301 “Characteristic 177 00:03:27,302 --> 00:03:27,354 “Characteristic D 178 00:03:27,355 --> 00:03:27,407 “Characteristic De 179 00:03:27,408 --> 00:03:27,460 “Characteristic Def 180 00:03:27,461 --> 00:03:27,513 “Characteristic Defi 181 00:03:27,514 --> 00:03:27,566 “Characteristic Defin 182 00:03:27,567 --> 00:03:27,619 “Characteristic Defini 183 00:03:27,620 --> 00:03:27,672 “Characteristic Definit 184 00:03:27,673 --> 00:03:27,725 “Characteristic Definiti 185 00:03:27,726 --> 00:03:27,777 “Characteristic Definitio 186 00:03:27,778 --> 00:03:27,830 “Characteristic Definition 187 00:03:27,831 --> 00:03:27,883 “Characteristic Definition” 188 00:03:27,884 --> 00:03:27,936 “Characteristic Definition” 189 00:03:27,937 --> 00:03:27,989 “Characteristic Definition” t 190 00:03:27,990 --> 00:03:28,042 “Characteristic Definition” ta 191 00:03:28,043 --> 00:03:28,095 “Characteristic Definition” tab 192 00:03:28,096 --> 00:03:28,148 “Characteristic Definition” tab: 193 00:03:28,149 --> 00:03:28,549 “Characteristic Definition” tab: 194 00:03:28,573 --> 00:03:33,163 In this tab the information related to the differential characteristic curve is entered. 195 00:03:33,187 --> 00:03:38,851 This section is similar to “AMT Differential” room which has been thoroughly explained in previous videos. 196 00:03:38,875 --> 00:03:49,694 However, in this room, it is not necessary to enter the differential characteristic curve because in this room only the harmonic characteristic is displayed and “Inrush Blocking” test is performed. 197 00:03:49,718 --> 00:03:54,051 This information is mentioned here so that the “Xrio” file is correctly “Loaded”. 198 00:03:54,076 --> 00:03:54,126 “ 199 00:03:54,127 --> 00:03:54,177 “H 200 00:03:54,178 --> 00:03:54,228 “Ha 201 00:03:54,229 --> 00:03:54,278 “Har 202 00:03:54,279 --> 00:03:54,329 “Harm 203 00:03:54,330 --> 00:03:54,380 “Harmo 204 00:03:54,381 --> 00:03:54,431 “Harmon 205 00:03:54,432 --> 00:03:54,482 “Harmoni 206 00:03:54,483 --> 00:03:54,533 “Harmonic 207 00:03:54,534 --> 00:03:54,584 “Harmonic” 208 00:03:54,585 --> 00:03:54,635 “Harmonic” 209 00:03:54,636 --> 00:03:54,685 “Harmonic” t 210 00:03:54,686 --> 00:03:54,736 “Harmonic” ta 211 00:03:54,737 --> 00:03:54,787 “Harmonic” tab 212 00:03:54,788 --> 00:03:54,838 “Harmonic” tab: 213 00:03:54,839 --> 00:03:55,139 “Harmonic” tab: 214 00:03:55,163 --> 00:04:00,470 The information related to the harmonic differential characteristic curve of the relay is entered in this tab. 215 00:04:00,494 --> 00:04:10,302 In “Harmonic” field, the harmonic level is specified and it is possible to specify the information second to 20th harmonic and inject it by the device. 216 00:04:10,326 --> 00:04:17,175 Note that, “n/a” in front of any harmonic level means that the settings related to that harmonic is not specified. 217 00:04:17,199 --> 00:04:24,750 In “Ixf/Idiff” field, which is disabled, the proportion of the “nth” harmonic to the differential current is displayed. 218 00:04:24,774 --> 00:04:37,599 In “Tol. Relative” and “Tol. Absolute” fields, the relay tolerances are entered in terms of a percentage of the nominal value or as “Abs” respectively and the software picks the highest tolerance amount as the reference. 219 00:04:37,623 --> 00:04:42,292 Next, the differential characteristic curve is entered based on the relay parameters. 220 00:04:42,316 --> 00:04:49,053 20 percent and 45 percent are set on the level 2 and level 5 harmonic current relays. 221 00:04:49,077 --> 00:04:53,310 First click on “Remove All” to remove all previous lines. 222 00:04:53,334 --> 00:05:05,248 Then, after entering the start point coordination in “New Start Point” section and then end point coordination in “New End Point” section in terms of “Idiff” and “Ixf/Idiff” click on 223 00:05:05,273 --> 00:05:13,368 “Add” to display the information of this line in the table at the bottom of the page and display the characteristic curve in the diagram at the right side. 224 00:05:13,392 --> 00:05:19,285 Note that it is also possible to edit the start and end points from the box at the bottom of the page. 225 00:05:19,310 --> 00:05:29,647 To enter the fifth harmonic information, select 5 in “Harmonic” field and enter the start point and end point coordinates in the table at the bottom of the page. 226 00:05:29,671 --> 00:05:37,395 Then click on “Ok” and close “Test Object”. You can see that the second harmonic differential characteristic curve is displayed by default.