1 00:00:29,719 --> 00:00:29,771 I 2 00:00:29,772 --> 00:00:29,823 In 3 00:00:29,824 --> 00:00:29,876 Int 4 00:00:29,877 --> 00:00:29,929 Intr 5 00:00:29,930 --> 00:00:29,981 Intro 6 00:00:29,982 --> 00:00:30,034 Introd 7 00:00:30,035 --> 00:00:30,087 Introdu 8 00:00:30,088 --> 00:00:30,139 Introduc 9 00:00:30,140 --> 00:00:30,192 Introduci 10 00:00:30,193 --> 00:00:30,244 Introducin 11 00:00:30,245 --> 00:00:30,297 Introducing 12 00:00:30,298 --> 00:00:30,350 Introducing 13 00:00:30,351 --> 00:00:30,402 Introducing “ 14 00:00:30,403 --> 00:00:30,455 Introducing “V 15 00:00:30,456 --> 00:00:30,508 Introducing “VI 16 00:00:30,509 --> 00:00:30,560 Introducing “VI 17 00:00:30,561 --> 00:00:30,613 Introducing “VI S 18 00:00:30,614 --> 00:00:30,666 Introducing “VI St 19 00:00:30,667 --> 00:00:30,718 Introducing “VI Sta 20 00:00:30,719 --> 00:00:30,771 Introducing “VI Star 21 00:00:30,772 --> 00:00:30,824 Introducing “VI Start 22 00:00:30,825 --> 00:00:30,876 Introducing “VI Starti 23 00:00:30,877 --> 00:00:30,929 Introducing “VI Startin 24 00:00:30,930 --> 00:00:30,981 Introducing “VI Starting 25 00:00:30,982 --> 00:00:31,034 Introducing “VI Starting” 26 00:00:31,035 --> 00:00:31,087 Introducing “VI Starting” 27 00:00:31,088 --> 00:00:31,139 Introducing “VI Starting” r 28 00:00:31,140 --> 00:00:31,192 Introducing “VI Starting” ro 29 00:00:31,193 --> 00:00:31,245 Introducing “VI Starting” roo 30 00:00:31,246 --> 00:00:31,297 Introducing “VI Starting” room 31 00:00:31,298 --> 00:00:31,350 Introducing “VI Starting” room: 32 00:00:31,351 --> 00:00:31,851 Introducing “VI Starting” room: 33 00:00:32,744 --> 00:00:40,883 “VI Starting” room is designed to test “51V” function. In this function, the Over current unit trip depends on the voltage drop. 34 00:00:40,908 --> 00:00:46,431 In fact, “VI Starting” is a current function whose “Pickup” is linked to voltage. 35 00:00:47,186 --> 00:00:55,275 Note that in “51V” function test, evaluation of detecting or not detecting fault is performed based on the test 36 00:00:55,299 --> 00:01:07,429 voltage and current amount which can be “Voltage-Controlled” or “Voltage-Restrained” and is used as generator-differential protection backup as well as for coordinating high-current relays in power systems. 37 00:01:07,453 --> 00:01:13,561 To explain the difference between these two functions, characteristic curve and examples are used. 38 00:01:13,855 --> 00:01:21,714 If the “51V” function is “Voltage-Controlled”, its characteristic curve will look like what you can see in this picture. 39 00:01:21,738 --> 00:01:32,399 For a relay with this characteristic curve, the relay performs the pickup in currents higher than “5A” and for currents lower than “4A” the relay does not perform the pickup. 40 00:01:32,423 --> 00:01:40,024 But if the current is between “4A” and “5A”, the relay performs the pickup only if the voltage is lower than “50V”. 41 00:01:40,048 --> 00:01:47,820 In the settings of this function, “4A” and “5A” currents are specified as “I>” and “I>>” respectively. 42 00:01:47,844 --> 00:01:52,345 In the second mode, if the characteristic curve is “Voltage-Restrained”, like the previous mode, 43 00:01:52,370 --> 00:02:00,094 the relay detects a fault if the current is higher than “5A” and in currents lower than “4A” it does not perform the pickup. 44 00:02:00,118 --> 00:02:05,941 The difference is that between “4A” and “5A”, the pickup voltage value has a linear increase. 45 00:02:05,965 --> 00:02:12,774 In this function, it is possible to specify the settings for phase to phase and phase to earth voltage faults separately. 46 00:02:12,798 --> 00:02:21,949 This is also considered in the characteristic curve page of this function so that if you add a shot on the characteristic curve in single-phase “Fault Type”, 47 00:02:21,973 --> 00:02:28,230 the specified voltage is the voltage of the phase and if you select two-phase or three-phase “Fault Type”, 48 00:02:28,254 --> 00:02:37,452 the specified voltage is line-to-line voltage in which case the device produces the corresponding voltage to produce the line-to-line voltage. 49 00:02:37,476 --> 00:02:42,294 “Test View” and “VI Starting Characteristic” are the two main windows of this room. 50 00:02:42,319 --> 00:02:47,531 In “Test View” window, the three main tests of this function are performed in “Shot Test”, 51 00:02:47,556 --> 00:02:59,390 “Check Test” and“Search Test” tabs which will be explained in future videos. In “VI Starting Characteristic” window, the characteristic curve of the function is displayed according to the current and voltage. 52 00:02:59,414 --> 00:03:06,585 To specify the settings of this function, select “Test Object” from the toolbar and double-click on “VI Starting” 53 00:03:06,609 --> 00:03:17,036 from the tree diagram and then enter your desired settings to be displayed in “VI Starting Characteristic” characteristic curve in “VI Starting Parameters” page. 54 00:03:17,060 --> 00:03:17,113 R 55 00:03:17,114 --> 00:03:17,166 Re 56 00:03:17,167 --> 00:03:17,220 Rel 57 00:03:17,221 --> 00:03:17,274 Rela 58 00:03:17,275 --> 00:03:17,327 Relay 59 00:03:17,328 --> 00:03:17,381 Relay 60 00:03:17,382 --> 00:03:17,435 Relay s 61 00:03:17,436 --> 00:03:17,489 Relay se 62 00:03:17,490 --> 00:03:17,542 Relay set 63 00:03:17,543 --> 00:03:17,596 Relay sett 64 00:03:17,597 --> 00:03:17,650 Relay setti 65 00:03:17,651 --> 00:03:17,703 Relay settin 66 00:03:17,704 --> 00:03:17,757 Relay setting 67 00:03:17,758 --> 00:03:17,811 Relay settings 68 00:03:17,812 --> 00:03:17,864 Relay settings 69 00:03:17,865 --> 00:03:17,918 Relay settings i 70 00:03:17,919 --> 00:03:17,972 Relay settings in 71 00:03:17,973 --> 00:03:18,026 Relay settings in 72 00:03:18,027 --> 00:03:18,079 Relay settings in “ 73 00:03:18,080 --> 00:03:18,133 Relay settings in “V 74 00:03:18,134 --> 00:03:18,187 Relay settings in “VI 75 00:03:18,188 --> 00:03:18,240 Relay settings in “VI 76 00:03:18,241 --> 00:03:18,294 Relay settings in “VI S 77 00:03:18,295 --> 00:03:18,348 Relay settings in “VI St 78 00:03:18,349 --> 00:03:18,401 Relay settings in “VI Sta 79 00:03:18,402 --> 00:03:18,455 Relay settings in “VI Star 80 00:03:18,456 --> 00:03:18,509 Relay settings in “VI Start 81 00:03:18,510 --> 00:03:18,562 Relay settings in “VI Starti 82 00:03:18,563 --> 00:03:18,616 Relay settings in “VI Startin 83 00:03:18,617 --> 00:03:18,670 Relay settings in “VI Starting 84 00:03:18,671 --> 00:03:18,724 Relay settings in “VI Starting” 85 00:03:18,725 --> 00:03:18,777 Relay settings in “VI Starting” 86 00:03:18,778 --> 00:03:18,831 Relay settings in “VI Starting” R 87 00:03:18,832 --> 00:03:18,885 Relay settings in “VI Starting” Ro 88 00:03:18,886 --> 00:03:18,938 Relay settings in “VI Starting” Roo 89 00:03:18,939 --> 00:03:18,992 Relay settings in “VI Starting” Room 90 00:03:18,993 --> 00:03:19,493 Relay settings in “VI Starting” Room 91 00:03:19,517 --> 00:03:29,200 In VI Starting Parameters page, you can enter the characteristic curve information in characteristic section. In I> and I>> fields, 92 00:03:29,224 --> 00:03:33,463 the lower and upper limits of the “Pick up” current are entered. 93 00:03:33,487 --> 00:03:40,666 In this protection, for currents lower than I>, the function does not give a trip regardless of the voltage. 94 00:03:40,690 --> 00:03:46,984 Also, for current higher than I>>, this function gives a trip regardless of the voltage. 95 00:03:47,009 --> 00:03:53,380 The range between these two values is where the voltage value is influential for the performance of the function. 96 00:03:53,404 --> 00:03:58,322 Voltage settings of this function is entered in VLN and VLL fields. 97 00:03:58,346 --> 00:04:04,099 As mentioned before, this function needs different settings for phase to earth and phase to phase faults. 98 00:04:04,123 --> 00:04:17,891 VLN is used for specifying phase to earth faults settings; VLN (I>) and VLN (I>>) are used for specifying the voltage value of lower and upper limits respectively. 99 00:04:17,915 --> 00:04:25,229 VLL (I>) and VLL (I>>) have the same function for phase to phase faults. 100 00:04:25,261 --> 00:04:34,230 Note that for VI Starting-Controlled function, the same value must be entered for the lower and upper limits of VLN and VLL. 101 00:04:34,255 --> 00:04:38,936 But for Restrained mode, the lower limit must be lower than the upper limit. 102 00:04:38,960 --> 00:04:44,867 Also, current and voltage tolerances of this function are entered in “Tolerances” section.