Siemens 8BT2 Installation And Operating Instructions Manual page 40

Bolt sizes used in lower main busbar assembly
Rated current
of bus–tie panel
800A
1250A
2000A
2500A / 3150A
40
ATTENTION!
Lower main busbars are separately provided with panels. Their surfaces are partly
covered by heat shrinkable insulation material as shown below:
L1 phase......
L2 phase......
L3 phase......
Depending on the current rating, the copper bar quantity is various in 1 pc ( 1250A), 2pcs
(2000A) and 3 pcs (2500A – 3150A) per phase. In each phase, they are covered together
with heat shrinkable insulation material.
Do not separate copper bars in a phase covered by a common heat shrinkable
insulation material. It will be assembled as a whole.
Do not cause any damage on heat shrinkable insulation material during the
assembly. There is a high risk to have a flashover because of the damaged
insulation material.
NOTE!
The strain washers at the busbars have one side cambered inwards and one side
cambered outwards. Observe correct position of strain washers for assembly.
Mount the strain washers so that the side cambered outwards points at the bolt
head or the nut.
NOTE!
Bolt types for connections of lower main busbars:
Hexagon head bolt without nut, used only at Current Transformer or Post
Insulator connections in the sectionalizing panel.
Mushroom head bolt with nut, used at connections of lower main
busbars in the sectionalizing and busriser panels.
Lower Main
Riser bars
Busbars
(mm)
(mm)
40x10
80x10
2x40x10
2x80x10 2x80x10
3x80x10 3x80x10
Please see the following drawings related to the connection details of lower main busbars for
all current rating combinations in the sectionalizing and busriser panels:
Revision 04 * INSTALLATION AND OPERATING INSTRUCTIONS 8BT2 * 881-4027.9
Sectionalizing panel
Current transformer Current transformer
with earthing without earthing
switch
M12x40
M12x50
M12x60
Busriser
panel
switch
M12x35
M12x30
M12x50
M12x40 M12x60
M12x50 M12x75