ABB ACS2000 AFE 2MVA - Page 101

101 ACS2000 AFE 2MVA UM 3BHS355653 ZAB E01 REV. H
Bolted connections
Material requirements
• Use stainless steel bolts and nuts with the
appropriate steel grade and property class for
the connection (recommended: A2-70 [designa-
tion according to ISO 3506]).
• Nuts with bonded coating can be used as an
alternative to uncoated stainless steel nuts.
Connection type
The following connection type is recommended
when a cable lug (4) is connected to a busbar:
• Spring washer (1) and flat washer (2) on each
side of the busbar (3).
Other washers can be used, provided they
maintain the required contact pressure.
• Cable lugs suitable for M12 bolts.
Lubrication
• If stainless steel bolts and nuts are used, lubri-
cate the thread and head contact surface of the
bolt using recommended pasts, eg, Molykote D
paste
—
If a coated nut (eg, with bonded
molybdenum-disulfide [MoS
2
]
coating) is used, the connection
does not have to be lubricated.
Tightening torque
• Tighten bolted connections with bolts of sizes
M10 and greater with the recommended nomi-
nal torque for the bolt size used.
—
References
—
6-8 Bolted busbar
connection
—
6-8
1
2
3
2
1
4