High- high- VV fuse-links imum cold resistance power dissipation pre-arcing I t value total I t value [kv] (mm) I n [A] (ka) [mω] [W] [A s] [A s] 1 580,1 57 A 0 370 9 17,3 1 A 5 00 10 3 30 10 A 55 7 11 1 530 1 A 0 37 13 70 0 A 80 31 15 30 3 7 5 A 105.5 0 5 0 19 3 130 18. 8 1 10 10 100 0 A 178 13. 33 70 18 100 A 0 8.5 70 31 300 3 A 70 7.0 3 10 00 800 80 A 30 5. 18 700 93 0 100 A. 38 000 197 000 15 A 10 3. 101 1 0 319 000 10 A 810.7 135 10 00 58 000 A 5 00 10 3 30 10 A 55 7 11 1 530 1 A 0 37 13 70 3/7. 0 A 80 31 15 30 3 7 5 A 105.5 0 5 0 3 130 18. 8 1 10 10 100 0 A 178 13. 33 70 18 100 9 A 0 8.5 70 31 300 3 A 70 7.0 3 10 00 800 80 A 30 5. 18 700 93 0 100 A. 38 000 197 000 15 A 10 3. 101 1 0 319 000 10 A 810.7 135 10 00 58 000 00 A 1000.1 155 151 780 789 70 A 1 1.7 19 8 10 1 188 800 3 A 70 8.5 10 00 800 80 A 30.5 77 18 700 93 0 100 A 5.7 105 38 000 197 000 15 A 10 115 1 0 319 000 10 A 810 3. 151 10 00 58 000 00 A 1000.5 195 151 780 789 70 A 1. 53 8 10 1 188 800 315 A 1575 1.75 30 38 0 1 91 930 101
imum cold resistance power dissipation pre-arcing I t value total I t value [kv] (mm) I n [A] (ka) [mω] [W] [A s] [A s] 1 980,1 57 A 0 15 17,3 1 A 7 00 1 3 30 10 A 87 8 11 1 530 19 1 A 80 0,5 19 70 0 A 100 7 30 3 7 5 A 15 37 3 5 0 3 10 7 3 10 10 100 0 A 00 1 5 70 18 100 A 1 70 31 300 1 980,1 57 A 0 15 17,3 1 A 5 00 1 3 30 10 A 87 8 11 1 530 1 A 0 0,5 19 70 0 A 80 7 30 3 7 9 5 A 105 37 3 5 0 3 130 7 3 10 10 100 0 A 178 1 5 70 18 100 A 0 1 70 31 300 3 A 70 10.5 5 10 00 800 /1 80 A 30 8 73 18 700 93 0 100 A 7.3 109 38 000 197 000 15 A 10 5.1 137 1 0 319 000 10 A 810 189 10 00 58 000 1 980,1 57 A 0 15 17,3 1 A 5 00 1 3 30 10 A 87 8 11 1 530 1 A 0 0.5 19 70 0 A 80 7 30 3 7 5 A 105 37 3 5 0 3 130 7 3 10 10 100 0 A 178 1 5 70 18 100 A 0 1 70 31 300 3 A 70 10.5 5 10 00 800 80 A 30 8 73 18 700 93 0 100 A 7.3 109 38 000 197 000 15 A 10 5.1 137 1 0 319 000 10 A 810 189 10 00 58 000 00 A 1000 3.3 38 151 780 789 70 537 10 A 810 189 10 00 58 000 00 A 1000 3.3 38 151 780 789 70 A 1.5 305 810 1 188 800 10
imum cold resistance power dissipation pre-arcing I t value total I t value [kv] (mm) I n [A] (ka) [mω] [W] [A s] [A s] 1 100 8,1 57 A 0 900 17 17,3 1 A 7 70 35 3 30 10 A 100 11 11 1 530 1 A 80 8 8 70 9 0 A 100 5 38 30 3 7 5 A 15 5 5 5 0 3 10 38 1 10 10 100 0 A 00 9 9 70 18 100 A 19 3 70 31 300 3 A 83 15 91 10 00 800 80 A 00 11 118 18 700 93 0 1 100 8,1 57 A 0 900 17 17,3 1 A 5 70 35 3 30 10 A 100 11 11 1 530 1 A 0 8 8 70 0 A 80 5 38 30 37 5 A 105 5 5 50 37 3 130 38 1 10 10 100 10/17.5 0 A 178 9 9 70 18 100 A 0 19 3 70 31 300 3 A 70 15 91 10 00 800 80 A 30 11 118 18 700 93 0 100 A 9.5 15 38 000 197 000 15 A 10.8 193 1 0 319 000 10 A 810 5.5 55 10 00 58 000 1 100 8,1 57 A 0 900 17 17,3 1 A 5 70 35 3 30 10 A 100 11 11 1 530 1 A 0 8 8 70 0 A 80 5 38 30 3 7 5 A 105 5 5 5 0 3 130 38 1 10 10 100 0 A 178 9 9 70 18 100 A 0 19 3 70 31 300 3 A 70 15 91 10 00 800 80 A 30 11 118 18 700 93 0 100 A 9.5 15 38 000 197 000 15 A 10.8 193 1 0 319 000 103
imum cold resistance power dissipation pre-arcing I t value total I t value [kv] (mm) I n [A] (ka) [mω] [W] [A s] [A s] 1 00 1,1 57 A 0 1300 35 17,3 1 A 7 900 5 3 30 10 A 10 19 11 1 530 9 1 A 80 10 35 70 0 A 31,5 100 85 30 3 7 5 A 15 7 58 5 0 3 10 8 71 10 10 100 0 A 00 37.5 95 70 18 100 A 5 81 70 31 300 3A 83 0 10 10 00 800 1 00 1,1 57 A 0 1300 35 17,3 1 A 5 900 5 3 30 10 A 10 19 11 1 530 1 A 0 10 35 70 0 A 80 85 30 3 7 5 A 105 7 58 5 0 3 130 8 71 10 10 100 10/ 0 A 178 37.5 95 70 18 100 A 0 5 81 70 31 300 3A 70 0 10 10 00 800 80 A 30 15 157 18 700 93 0 100 A 13.8 35 38 000 197 000 15 A 10 9. 30 1 0 319 000 1 00 1,1 57 A 0 1300 35 17,3 1 A 5 900 5 3 30 10 A 10 19 11 1 530 1 A 0 10 35 70 0 A 80 85 30 3 7 537 5 A 105 7 58 5 0 3 130 8 71 10 10 100 0 A 178 37.5 95 70 18 100 A 0 5 81 70 31 300 3A 70 0 10 10 00 800 80 A 30 15 157 18 700 93 0 100 A 13.8 35 38 000 197 000 15 A 10 9. 30 1 0 319 000 10 A 810 8 10 7 388 180 10
imum cold resistance power dissipation pre-arcing I t value total I t value [kv] (mm) I n [A] (ka) [mω] [W] [A s] [A s] 1 900 17,1 57 A 0 1870 5 17,3 1 A 0 7 1390 73 3 30 10 A 08 8 11 1 530 1 A 80 1 53 70 1 900 17,1 57 A 0 1870 5 17,3 1 A 5 1390 73 3 30 0/3 10 A 08 8 11 1 530 1 A 0 1 53 70 537 0 A 80 1 7 30 3 7 31,5 5 A 105 95 87 5 0 3 130 9 111 1 0 10 100 0 A 178 5 139 70 18 100 A 0 35 15 70 31 300 3 A 70 8 185 10 00 800 80 A** 30 1 13 18 700 93 0 Force / travel striker pin diagram Connection in indoor switchgear, example: striker force 10 N VVT-D striker force 80 N VVC striker force N 105
Fuse-link - VV Cut-off diagram for VV-Thermo fuse links Cut-off Prospective Prearcing time (s) Time- characteristics for VV-thermo fuse links 10 3 10 10 1 10 0-1 10 A A A 1A 5A 0A A 80A 15A 10A 0A 3A 3A 100A 10A Prearcing time (s) - 10 1 10 100 1000 10000 Prospective Prospective 10
Selection of fuses for transformer protection For HV fuse-link selection, following transformer technical features has to be known: power P n (kva) Short-circuit U cc (%) I nt usually between 8-1xI nt Short-circuit I cc Overload usually 1. I nt Maximum short-circuit duration. Standard sec for transformers up to 30 kva and 3 sec for higher powers Following HV fuse-link technical features has to be known: U n (kv) I n I/t Characteristics According to the curves Melting (0.1sec) I f (0.1sec) Melting at s ec or 3sec melting time Minimum I 3 Breaking I 1 (ka) General about transformer protection: Fuse-link U n must be higher then network. Maximum fuse-link I 1 must be higher then short circuit- Icc. should not melt the fuse-link. Melting at 100 msec must be higher than 1 times transformer Fuse-link has to operate before the expected short-circuit damage the transformer Icc > I f ( sec) or Icc > I f (3 sec) Fuse-link must be able to withstand possible short duration overloads. I n FUSE > 1. I n TRAFO Selection table for VV - THERMO back-up fuse links Pt (kva) Ip at kv /7, kv 10/1 kv 15/17.5kV Ip at 10 kv Ip at 15 kv 5 58 10 1 3 3 35 10 3 3 10 3 75 7 8 1 0 100 5 10 1 100 3 35 10 100 100 10 115 5 3 15 70 10 1 15 10 1 15 15 1 15 3 0 10 7 8 1 0 10 5 58 10 1 10 10 15 185 0 00 9 110 0 5 00 7 1 0 00 00 19 30 0 1 138 5 3 8 9 0 5 89 3 315 1 173 3 0 315 10 115 5 3 315 315 30 3 3 00 18 18 0 00 1 15 3 0 00 00 39 3 80 0 3 7 3 0 15 185 0 0 0 8 577 80 100 30 9 3 3 30 19 30 0 30 30 1 77 100 15 800 3 37 3 80 800 93 3 800 800 77 93 100 15 1000 55 80 100 1000 31 370 3 80 1000 1000 9 115 15 10 1 58 9 100 15 1 38 80 100 1 1 10 10 10 00* 1 7 8 100 15 1 8 577 100 15 1 100 15 188 00* * 10 9 1109 15 10 10 739 15 10 10 000 19 310 * 315* 100 115 1380 10 00* 100 * Note: nonstandard tube dimmension 107
Selection table for VV - THERMO back-up fuse links Pt (kva) Ip at 0 kv 0/ kv 30/3 kv Ip at 30 kv 1 18 3 1 1 3 75 100 1 17 100 100 3 35 10 15 3 10 15 15 3 10 10 9 10 10 10 5 55 10 1 00 3 37 10 00 00 70 10 1 10 1 7 8 1 0 315 5 58 10 1 315 315 9 109 0 5 00 73 1 0 00 00 1 138 5 3 0 8 9 0 5 0 0 1 173 3 0 30 10 115 0 5 30 30 18 17 0 800 1 15 5 3 800 800 3 77 3 1000 15 185 0 1000 1000 9 3 3 1 19 30 3 1 1-pole fuse-base INDOOR MOUNTING OUTDOOR MOUNTING [kv] A [mm] B [mm] C [mm] D [mm] E [mm] F [mm] 7, and 1 05 05 35 15 195 17,5 and 555 335 75 5 95 3 3 570 33 375 30 7, and 1 05 05 35 179 77 17,5 and 555 335 75 5 95 3 3 570 337 380 35 internal fuse base 108
external fuse base Definitions and terms Back-up fuse-links According to standard IEC 08-1 Fifth edition (00-01), item 3.3.3, Back-up fuse is -limiting fuse capable of, under specified conditions of use and behaviour, all s from the imum (I 1 ) down to the imum (I 3 ). Back-up fuse links should not operate below theirs Ľimum ę. If the short-circuit of the transformer is lower than the imum, additional protection must be provided. range s ETI VV Thermo fuse-links must be ope at the. At lower operating s without limitation provided, please contact ETI team. Breaking I 1 This value (sometimes named imum of indicates, that this is the imum which can be interrupted by the fuse-link. I 1 should be greather than the imum expected short circuit at the fuse-link site. Minimum I 3 This value (sometimes named imum is specified for Back-up fuse-links. Up from this, fuse-link is capable to fault. Power dissipation of a fuse-link P n The power dissipation of a VV Thermo fuse-link is specified at the of the fuse-link. For calculations of protection with VV Thermo fuse-link, it should be noted, that operating is normally below half of the. Time- characteristics I/t characteristics represents the correlation between and time up to the melting of a silver fuse element. For coordination with other protection devices, melting integral must be referred for melting times below 100ms. Current limitation This is most significant advantage of fuse-links compared to mechanical switches. Contacts of that switches need much longer time as fuse-link to interrupt fault s. VV fuse-link interrupt fault within few miliseconds and sinusoidal does not reach its peak value. Switching s Between -limiting process, short circuit must be limited and reduced as soon as possible. This require a switching that exceed the normal system and force the to zero. Permissible value of switching is. times peak value of the imum. 109