Siemens 8BT2 Installation And Operating Instructions Manual page 34

Main Busbar systems of feeders
34
ATTENTION!
Please ensure that the bolt directions are applied correctly as mentioned at fig19 –
fig28. It is important to provide the sufficient clearances between phases and
earthed parts.
Apply the exact bolt sizes listed in below table due to the critical electrical
clearances between live parts under the voltage. Longer the bolt is used, more
risks it is taken at the insulation.
The threads of the bolts and nuts must be dry and non-greasy.
Check contact surfaces of busbars, brush if necessary and apply a thin film of Shell
Vaseline 8422 DAB 8.
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!
All bolts used in main busbar assembly are "mushroom head type".
Mushroom head bolt with nut
Revision 04 * INSTALLATION AND OPERATING INSTRUCTIONS 8BT2 * 881-4027.9