TechTopics No. 92 Heat generation estimation for ... - Siemens

Approximate heat generation (in watts) for SIMOVAC non-arcresistantand SIMOVAC-AR arc-resistant medium-voltage controllersComponentsizeContactor 400 AFuse sizeTypical fullloadamperes(FLA) 1Full-voltagenon-reversing(FVNR)Full-voltagereversing (FVR)2R 27 A 43 W3R 40 A 57 W4R 60 A 88 W6R 83 A 118 A9R 121 A 181 W12R 151 A 228 W18R 241 A 451 W24R 343 A 692 W15E 11 A 22 W20E 14 A 24 W25E 18 A 27 W30E 21 A 30 W40E 28 A 43 W50E 35 A 46 W65E 46 A 59 W80E 56 A 70 W100E 72 A 87 W125E 88 A 104 W150E 105 A 120 W175E 130 A 167 W200E 140 A 186 W250E 180 A 254 W300E 225 A 354 W350E 263 A 448 W400E 300 A 562 W450E 348 A 659 WApproximate heat generation (in watts) for SIMOVAC non-arcresistantand SIMOVAC-AR arc-resistant medium-voltage controllersComponentsizeContactor 720 AComponentsizeLIS switch 600 ALIS switch1,200 AComponent sizeFuse size Typical FLA 1 FVNRFVR38R 490 A 758 W48X 600 A 956 W57X 689 A 1,247 W450E 348 A 503 W600E 451 A 724 W750E 520 A 956 WFuse sizeVertical section with main busCurrentFVNRFVR450E 348 A 439 W600E 451 A 586 W750E 520 A 650 W900E 630 A 1,015 WComponent sizeSpace heaters per vertical sectionRated currentVoltage transformers (VTs) (set of three, includingisolation switch)FVNRFVR1,200 A 188 W2,000 A 206 W3,000 A 250 W4,000 A 413 WConversion factor: Watts x 3.415179 = BTU/hour.FVNRFVR200 W50 WFootnote:1See text for assumptions used for typical current. For motors, typicalcurrent is that for a machine typically protected by the size of fuseshown. For transformers, current is in the range of 70 percent to 80percent of the fuse E-rating, with specific value considered typicalfor a transformer protected by the fuse size shown.2