Siemens 8BT2 Installation And Operating Instructions Manual page 35

Bolted joints for busbar connections
Rated current Main Busbars
of main
busbars
800A 40x10
80x10
1250A
80x10
2x80x10
2000A
2x80x10
3x80x10
2500A / 3150A 3x80x10
3x80x10
881-4027.9 * INSTALLATION AND OPERATING INSTRUCTIONS 8BT2 * Revision 04
Dropper bars (mm)
(mm)
40x10
40x10.......or......80x10
2x40x10
40x10.......or......80x10
2x40x10
40x10.......or......80x10
2x40x10....or...2x80x10
3x80x10
Please see the below drawings related to the connection details between main busbars,
dropper bars and intermediate copper spacers according to the different combination of current
ratings.
Fig19. Main busbar / Dropper bars ratings _ 800A / 800A
Fig20. Main busbar / Dropper bars ratings _ 1250A / 800A
Bolted joints with Nut with
strain washer strain washer
M12x40
M12x40
M12x50
M12x50
M12x60
M12x60
M12x70
M12x75
Tightening
torque
M12
M12
M12
M12
70 Nm
M12
M12
M12
M12
Control
tightening
torque
60 Nm
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