06 ELECTRICAL INSTALLATION
3BHS842007 E01 REV C
ACS6080
USER MANUAL
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6.7.5.4
Bolted busbar connections – non-marine drives
Figure 6-24 Bolted busbar connection - non-marine drive
6.7.5.4.1 Material requirements
Use stainless steel bolts and nuts with the appropriate steel grade and
property class for the connection (recommended: A2-70 - designation
according to ISO 3506-1)
Nuts with bonded coating can be used as an alternative to uncoated
stainless steel nuts.
6.7.5.4.2 Connection type
The following connection type is recommended when connecting a cable
lug to a busbar.
• Spring washer and flat washer on each side of the busbar.
The spring washer and flat washer can be replaced by a conical
spring washer (Fig. 6-23). Other washers can be used, provided they
maintain the required contact pressure.
• Use cable lugs suitable for M12 bolts.
6.7.5.4.3 Lubrication
If stainless steel bolts and nuts are used, lubricate 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 need to be lubricated.
6.7.5.4.4 Tightening torque
ABB recommends a tightening torque of 40 Nm for M12 bolts. For other
sizes, follow the manufacturer’s recommendations.
(1) Spring washer
(2) Flat washer
(3) Busbar
(4) Cable lug
1
1
2
2
3
4
