REG 316*4 1MRB520049-Uen / Rev. F
ABB Switzerland Ltd
3-99
An alternative is to adjust the position of the IDMT characteristic
to match the rated load of the protected unit and set the base
current to its rated current instead of its load current.
Enabling the characteristic ‘I-Start’
The IDMT characteristic is enabled when the current exceeds
the setting ‘I-Start’. A typical setting for ‘I-Start’ is 1.1 I
B
.
Choice of characteristic ‘c-Setting’
The constant ‘c-Setting’ determines the shape of the IDMT char-
acteristic. The settings for the standard characteristics according
to B.S. 142 are:
“normal inverse”
: c = 0.02
“very inverse” and “long time earth fault” : c = 1.00
“extremely inverse”
: c = 2.00.
Fig. 3.5.8.1 Operating characteristic of the directional IDMT
overcurrent function
Summary of Contents for REG316 4 Series
Page 4: ......
Page 6: ......
Page 90: ...ABB Switzerland Ltd REG 316 4 1MRB520049 Uen Rev F 3 52 ...
Page 96: ...ABB Switzerland Ltd REG 316 4 1MRB520049 Uen Rev F 3 58 ...
Page 108: ...ABB Switzerland Ltd REG 316 4 1MRB520049 Uen Rev F 3 70 ...
Page 116: ...ABB Switzerland Ltd REG 316 4 1MRB520049 Uen Rev F 3 78 ...
Page 142: ...ABB Switzerland Ltd REG 316 4 1MRB520049 Uen Rev F 3 104 ...
Page 148: ...ABB Switzerland Ltd REG 316 4 1MRB520049 Uen Rev F 3 110 ...
Page 154: ...ABB Switzerland Ltd REG 316 4 1MRB520049 Uen Rev F 3 116 ...
Page 176: ...ABB Switzerland Ltd REG 316 4 1MRB520049 Uen Rev F 3 138 ...
Page 182: ...ABB Switzerland Ltd REG 316 4 1MRB520049 Uen Rev F 3 144 ...
Page 190: ...ABB Switzerland Ltd REG 316 4 1MRB520049 Uen Rev F 3 152 ...
Page 216: ...ABB Switzerland Ltd REG 316 4 1MRB520049 Uen Rev F 3 178 ...
Page 234: ...ABB Switzerland Ltd REG 316 4 1MRB520049 Uen Rev F 3 196 ...
Page 256: ...ABB Switzerland Ltd REG 316 4 1MRB520049 Uen Rev F 3 218 ...
Page 330: ...ABB Switzerland Ltd REG 316 4 1MRB520049 Uen Rev F 3 292 ...
Page 338: ...ABB Switzerland Ltd REG 316 4 1MRB520049 Uen Rev F 3 300 ...
Page 342: ...ABB Switzerland Ltd REG 316 4 1MRB520049 Uen Rev F 3 304 ...
Page 348: ...ABB Switzerland Ltd REG 316 4 1MRB520049 Uen Rev F 3 310 ...
Page 352: ...ABB Switzerland Ltd REG 316 4 1MRB520049 Uen Rev F 3 314 ...
Page 356: ...ABB Switzerland Ltd REG 316 4 1MRB520049 Uen Rev F 3 318 ...
Page 360: ...ABB Switzerland Ltd REG 316 4 1MRB520049 Uen Rev F 3 322 ...
Page 366: ...ABB Switzerland Ltd REG 316 4 1MRB520049 Uen Rev F 3 328 ...
Page 370: ...ABB Switzerland Ltd REG 316 4 1MRB520049 Uen Rev F 3 332 ...
Page 374: ...ABB Switzerland Ltd REG 316 4 1MRB520049 Uen Rev F 3 336 ...
Page 388: ...ABB Switzerland Ltd REG 316 4 1MRB520049 Uen Rev F 3 350 ...
Page 427: ...REG 316 4 1MRB520049 Uen Rev B ABB Switzerland Ltd 4 29 Fig 4 13 Locus of the load angle d 90 ...
Page 444: ......
Page 626: ......
Page 628: ......
Page 684: ......
Page 688: ......
Page 802: ......
Page 810: ......
Page 824: ......
Page 825: ......
Page 826: ......
Page 827: ......
Page 828: ......
Page 829: ......
Page 830: ......
Page 831: ......
Page 832: ......
Page 833: ......
Page 834: ......
Page 835: ......
Page 836: ......
Page 837: ......
Page 838: ......
Page 839: ......
Page 840: ......
Page 841: ......
Page 842: ......
Page 843: ......
Page 844: ......
Page 845: ......
Page 846: ......
Page 847: ......
Page 848: ......
Page 849: ......
Page 850: ......
Page 851: ......
Page 852: ......
Page 853: ......
Page 854: ......
Page 855: ......
Page 856: ......
Page 857: ......
Page 858: ......
Page 859: ......
Page 860: ......
Page 861: ......
Page 862: ......
Page 863: ......
Page 864: ......
Page 865: ......
Page 866: ......
Page 867: ......
Page 868: ......
Page 869: ......
Page 870: ......
Page 871: ......
Page 872: ......
Page 873: ......
Page 874: ......
Page 875: ......
Page 876: ......
Page 877: ......
Page 878: ......
Page 879: ......
Page 880: ......
Page 881: ......
Page 882: ......
Page 883: ......
Page 884: ......
Page 885: ......
Page 886: ......
Page 887: ......
Page 888: ......
Page 889: ......
Page 890: ......
Page 891: ......
Page 892: ......
Page 893: ......
Page 894: ......
Page 895: ......
Page 896: ......
Page 897: ......
Page 898: ......
Page 899: ......
Page 900: ......
Page 901: ......
Page 902: ......
Page 903: ......
Page 904: ......
Page 905: ......
Page 906: ......
Page 907: ......
Page 908: ......
Page 909: ......
Page 910: ......
Page 911: ......
Page 912: ......
Page 913: ......
Page 914: ......
Page 915: ......
Page 916: ......
Page 917: ......
Page 918: ......
Page 919: ......
Page 920: ......
Page 921: ......
Page 922: ......
Page 923: ......
Page 924: ......
Page 925: ......
Page 926: ......
Page 927: ......
Page 928: ......
Page 929: ......
Page 930: ......
Page 931: ......
Page 932: ......
Page 933: ......
Page 934: ......
Page 935: ......
Page 936: ......
Page 937: ......
Page 938: ......
Page 939: ......
Page 940: ......
Page 941: ......
Page 942: ......
Page 943: ......
Page 944: ......
Page 945: ......
Page 946: ......
Page 947: ......
Page 948: ......
Page 949: ......
Page 950: ......
Page 951: ......
Page 952: ......
Page 953: ......
Page 954: ......
Page 955: ......
Page 956: ......
Page 957: ......
Page 958: ......
Page 959: ......
Page 960: ......
Page 961: ......
Page 962: ......
Page 963: ......
Page 964: ......
Page 965: ......
Page 966: ......
Page 967: ......
Page 968: ......
Page 969: ......
Page 970: ......
Page 971: ......
Page 972: ......
Page 974: ......
Page 976: ......