The minimum span when the commonly used rectangular busbars are arranged relative to the thickness direction of the busbars
For example: for a 31.5kA system, ich takes 80kA, such as for KYN28-12 switchgear a=27.5cm, for TMY100×10 and LMY100×10
Then: L copper MAX≤755 (mm).
L aluminum MAX≤530 (mm).
80×10 theoretical value 1680 1830 1900 2160 2475 1340 1460 1530 1725 1980
Recommended value 1400 1400 1600 1800 1800 1200 1200 1200 1400 1400
TMY
80×8 theoretical value 1500 1630 1710 1930 2210 1195 1300 1370 1540 1770
Recommended value 1200 1200 1400 1400 1800 1000 1000 1000 1200 1400
TMY
60×6 theoretical value 970 1060 1110 1255 1440
Recommended value 800 800 800 1000 1000
LMY
100×10 theoretical value 1475 1610 1690 1900 2185 1180 1290 1350 1525 1750
Recommended value 1200 1200 1200 1400 1600 1000 1000 1000 1200 1400
LMY
80×10 theoretical value 1180 1290 1350 1525 1750 945 1030 1080 1215 1395
Recommended value 1000 1000 1000 1200 1400 800 800 800 1000 1000
LMY
80×8 theoretical value 1050 1150 1205 1360 1560 845 925 970 1100 1250
Recommended value 800 800 1000 1000 1200 800 800 800 800 1000
(Table 2)
The minimum span (mm) when commonly used rectangular bus bars are arranged relative to each other in the width direction of the bus bar:
Short-circuit capacity KA/4S 31.5 40
Distance (mm) 275 400 460 275 400 460
TMY
100×10 theoretical value 755 910 980 605 730 780
Recommended value 600 800 800 600 600 600
