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D-68
Permissible current and selection of horizontal busbars
The goal is to optimise busbar size according to the installation and operating criteria.
Lateral flat busbars
Fupact INF/ISFT
Flat busbars, 5 mm thick
Type of bars
Permissible current (A)
Ambient temperature around the switchboard
25 °C
30 °C
35 °C
40 °C
45 °C
50 °C
Size per phase
IP
y
31 IP > 31 IP
y
31 IP > 31 IP
y
31 IP > 31 IP
y
31 IP > 31 IP
y
31 IP > 31 IP
y
31 IP > 31
1 bar, 60 x 5 mm
800
750
760
700
710
650
660
600
610
550
560
b
1 bar, 80 x 5 mm
1000 910
970
860
910
810
860
750
810
700
750
b
2 bars, 60 x 5 mm
1400 1250 1320 1160 1250 1070 1160 980
1070 880
980
b
2 bars, 80 x 5 mm
1700 1500 1600 1400 1500 1280 1400 1160 1280 1030 1160
b
Flat busbars, 10 mm thick
Type of bars
Permissible current (A)
Ambient temperature around the switchboard
25 °C
30 °C
35 °C
40 °C
45 °C
50 °C
Size per phase
IP
y
31 IP > 31 IP
y
31 IP > 31 IP
y
31 IP > 31 IP
y
31 IP > 31 IP
y
31 IP > 31 IP
y
31 IP > 31
1 bar, 50 x 10 mm
1150 1000 1080 930
1000 850
930
760
850
670
760
b
1 bar, 60 x 10 mm
1400 1250 1320 1160 1250 1070 1160 980
1070 880
980
b
1 bar, 80 x 10 mm
1700 1500 1600 1400 1500 1280 1400 1160 1280 1030 1160
b
2 bars, 50 x 10 mm
1940 1690 1810 1560 1700 1420 1560 1270 1420 1100 1270
b
2 bars, 60 x 10 mm
2170 1900 2040 1750 1900 1590 1750 1420 1590 1240 1420
b
2 bars, 80 x 10 mm
2670 2340 2500 2160 2340 1970 2160 1770 1970 1550 1770
b
2 x 1 bar, 80 x 10 mm
3020 2650 2840 2450 2650 2230 2450 2010 2230 1760 2010
b
Lateral Linergy busbars
Fupact INF/ISFT
Linergy bar
Type of bars
Permissible current (A)
Ambient temperature around the switchboard
25 °C
30 °C
35 °C
40 °C
45 °C
50 °C
IP
y
31 IP > 31 IP
y
31 IP > 31 IP
y
31 IP > 31 IP
y
31 IP > 31 IP
y
31 IP > 31 IP
y
31 IP > 31
Linergy 630
680
590
630
550
590
530
550
500
530
460
460
b
Linergy 800
840
760
800
720
760
680
720
640
680
600
640
b
Linergy 1000
1040 950
990
900
950
850
900
800
850
750
800
b
Linergy 1250
1290 1170 1230 1100 1170 1030 1100 970
1050 910
980
b
Linergy 1600
1580 1390 1480 1320 1390 1250 1320 1180 1250 1110 1180
b
Linergy 2000 (2 x 1000)
1900 1720 1820 1620 1720 1520 1620 1420 1520 1320 1420
b
Linergy 2500 (2 x 1250)
2380 2120 2260 2020 2120 1900 2020 1780 1900 1660 1780
b
Linergy 3200 (2 x 1600)
3060 2780 2920 2640 2780 2500 2640 2360 2500 2220 2360
b
connection impossible due to operating-temperature limits of the devices installed
in the switchboard.
b
Designing busbars
Fupact INF, ISFT
Vertical busbars
Additional informations
Designing electrical
characteristics